Specifications

ManualsBrandsAgilent Technologies ManualsAnalytical InstrumentsHP 8566B

About this Manual

We’ve added this manual to the Agilent website in an effort to help you support

your product. This manual is the best copy we could find; it may be incomplete

or contain dated information. If we find a more recent copy in the future, we will

add it to the Agilent website.

Support for Your Product

Agilent no longer sells or supports this product. Our service centers may be able

to perform calibration if no repair parts are needed, but no other support from

Agilent is available. You will find any other available product information on the

Agilent Test & Measurement website, www.tm.agilent.com.

HP References in this Manual

This manual may contain references to HP or Hewlett-Packard. Please note that

Hewlett-Packard's former test and measurement, semiconductor products and

chemical analysis businesses are now part of Agilent Technologies. We have

made no changes to this manual copy. In other documentation, to reduce

potential confusion, the only change to product numbers and names has been in

the company name prefix: where a product number/name was HP XXXX the

current name/number is now Agilent XXXX. For example, model number

HP8648A is now model number Agilent 8648A.

Summary of content (405 pages)

PAGE 1
About this Manual We’ve added this manual to the Agilent website in an effort to help you support your product. This manual is the best copy we could find; it may be incomplete or contain dated information. If we find a more recent copy in the future, we will add it to the Agilent website. Support for Your Product Agilent no longer sells or supports this product. Our service centers may be able to perform calibration if no repair parts are needed, but no other support from Agilent is available.
PAGE 2
Performance Tests and Adjustments Manual HP 8566B Spectrum Analyzer F!a HEWLETT PACKARD HP Part No.
PAGE 3
Notice. The information contained in this document is subject to change without notice. Hewlett-Packard makes no warranty of any kind with regard to this material, including but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.
PAGE 4
Certification Hewlett-Packard Company certifies that this product met its published specifications at the time of shipment from the factory. Hewlett-Packard further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology, to the extent allowed by the Institute’s calibration facility, and to the calibration facilities of other International Standards Organization members.
PAGE 5
Assistance Product maintenance agreements and other customer omistance agreemxmts are available for Hewlett-Rzckard products. Fbr any assistance, contact your nearest Hewlett-Fbckard Sales and Service Ome. Safety Notes Caution Caution denotes a hazard. It calls attention to a procedure that, if not correctly performed or adhered to, could result in damage to or destruction of the instrument. Do not proceed beyond a caution sign until the indicated conditions are fully understood and met.
PAGE 6
General Safety Considerations Warning Before this instrument is switched on, make sure it has been properly grounded through the protective conductor of the ac power cable to a socket outlet provided with protective earth contact. Any interruption of the protective (grounding) conductor, inside or outside the instrument, or disconnection of the protective earth terminal can result in personal injury. Warning There are many points in the instrument which can, if contacted, cause personal injury.
PAGE 7
How to Use This Manual This manual uses the following conventions: HP 8566B Documentation Description Front-Panel Ke r) Screen Text This represents a key physically located on the instrument. This indicates text displayed on the instrument’s screen. Included with the HP Model 8566B spectrum analyzer are manuals: The Installation and Verification Manual, the Operating and Programming Manual, and the Performance Tests and Adjustments Manual.
PAGE 8
Contents 1. General Information Introduction . . . . . . . . . . . . Instruments Covered by this Manual Operation Verification . . . . . . . Option 462 Instruments . . . . . . Option 857 Instruments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . l-l l-2 l-2 l-2 l-2 2. Performance Tests Introduction . . . . . . . . . . . . . . . . . . . . . 2-l Verification of Specifications . . . . . . . . . . . . . 2-l Calibration Cycle . . . . . . . . . .
PAGE 9
Test 11. Sweep Time Accuracy . . . . . . . . . . . 2-103 Test 12. Noise Sidebands Test . . . . . . . . . . . . 2-104 Test 13. Line-Related Sidebands . . . . . . . . . . . 2-105 Test 14. Average Noise Level . . . . . . . . . . . . 2-106 Test 15. Residual Responses . . . . . . . . . . . . . 2-107 Test 16. Harmonic And Intermodulation Distortion . . 2-108 Test 17. Image, Multiple, and Out-of-Band Responses . 2-109 Test 18. Gain Compression . . . . . . . . . . . . . 2-l 11 Test 19. 1st LO Output Amplitude . . .
PAGE 10
Crystal Filter Bypass Network Configuration . . . . . 3-219 4. Option 462 Introduction . . . . . . . . . . . . . . . . . . . . . 3. 6 dB Resolution Bandwidth Accuracy Test . . . . . 3. Impulse and Resolution Bandwidth Accuracy Test . 4. 6 dB Resolution Bandwidth Selectivity Test . . . . 4. Impulse and Resolution Bandwidth Selectivity Test . 5. Impulse and Resolution Bandwidth Switching Uncertainty Test . . . . . . . . . . . . . . . . Test 3.
PAGE 11
Figures l-l. Service Accessories, HP Part Number 08566-60001 . . 2-l. Center Frequency Test Setup . . . . . . . . . . . . 2-2. Center Frequency Accuracy Measurement . . . . . . 2-3. Narrow Span Test Setup . . . . . . . . . . . . . . . 2-4. Wide Span Test Setup . . . . . . . . . . . . . . . . 2-5. Resolution Bandwidth Measurement . . . . . . . . . 2-6. 60 dB Bandwidth Measurement . . . . . . . . . . . 2-7. Bandwidth Switching Uncertainty Measurement . . . 2-8. Log Scale Switching Uncertainty Measurement . .
PAGE 12
3-8. Location of AlA Components . . . . . . . . . . . 3-9. CRT Cut-Off Voltage 3-10. Waveform at AlA3TP5’ : : : : : : : : : : : : 1 : : 3-l 1. Discharging the CRT Post-Accelerator Cable . . . . . 3-12. High Voltage Adjustment Setup . . . . . . . . . . . 3-13. Location of High Voltage Adjustments . . . . . . . . 3-14. Location of AlA Label and Test Point . . . . . . . . 3-15. Discharging the CRT Post-Accelerator Cable . . . . . 3-16. Preliminary Display Adjustments Setup . . . . . . . 3-17.
PAGE 13
3-56. Sweep and DAC Adjustments Setup . . . . . . . . . 3-114 3-57. OV to + 1OV Sweep Ramp at A16TP3 . . . . . . . . . 3-115 3-58. Location of Sweep and DAC Adjustments . . . . . . . 3-116 3-59. Properly Adjusted DC Levels Between Sweep Ramps . 3-117 3-60. Improperly Adjusted DC Levels Between Sweep Ramps 3-117 3-61. YTO Main Coil Driver Adjustments Setup . . . . . . . 3-120 3-62. Location of YTO Main Coil Driver Adjustments . . . . 3-121 3-63. YTO Main Coil Driver Adjustments Setup (Alternate Procedure) .
PAGE 14
3-106. Sample and Hold Balance Adjustment Waveforms . 3-107. Waveform Before Adjustment . . . . . . . . . . 3-108. Low-Noise DC Supply . . . . . . . . . . . . . . 3-109. Crystal Filter Bypass Network Configurations . . . 4-l. Resolution Bandwidth Measurement . . . . . . . 4-2. Impulse Bandwidth Test Setup . . . . . . . . . . 4-3. 6 dB Resolution Bandwidth Measurement . . . . 4-4. 60 dB Bandwidth Measurement . . . . . . . . . 4-5. 60 dB Bandwidth Measurement . . . . . . . . . 4-6.
PAGE 15
!Ihbles 2-l. Performance Test Cross-Reference . . . . . . . . . . 2-2. Center Frequency Readout Accuracy . . . . . . . . . 2-3. Narrow Span Accuracy . . . . . . . . . . . . . . . 2-4. Wide Span Accuracy . . . . . . . . . . . . . . . . 2-5. Bandwidth Accuracy . . . . . . . . . . . . . . . . 2-6. Resolution Bandwidth Selectivity . . . . . . . . . . 2-7. Bandwidth Switching Uncertainty . . . . . . . . . . 2-8. Log Scale Switching Uncertainty . . . . . . . . . . . 2-9. IF Gain Uncertainty, 10 dB Steps . . . . .
PAGE 16
3-19. Crystal Filter Bypass Network Configuration for A4A7 (3MHz) . . . . . . . . . . . . . . . . . . . . . 3-219 4-l. 6 dB Resolution Bandwidth Accuracy . . . . . . . . 4-3 4-2. Impulse Bandwidth Accuracy . . . . . . . . . . . . 4-9 4-3. 6 dB Resolution Bandwidth Accuracy . . . . . . . . 4-9 4-4. 6 dB Resolution Bandwidth Selectivity . . . . . . . . 4-12 4-5. Impulse and Resolution Bandwidth Selectivity . . . . 4-15 4-6. Bandwidth Switching Uncertainty . . . . . . . . . . 4-17 5-l.
PAGE 17
1 General Information Introduction This HP 8566B Tests and Adjustments Manual contains two main sections: Performance Tests and Adjustments Procedures. This chapter lists the required test equipment for both sections. The performance tests provided should be performed for the following reasons: w If the test equipment for the Operation Verification Program is not available. w If the instrument does not pass all of the Operation Verification tests.
PAGE 18
Instruments Covered by this Manual This manual contains procedures for testing and adjusting HP 8566B spectrum analyzers, including those with Option 400 (400 Hz operation), Option 462 (impulse bandwidths and 6 dB bandwidths), and Option 857 installed. The procedures in this manual can also be used to adjust HP 8566A spectrum analyzers that have been converted into HP 8566B spectrum analyzers through the installation of an HP 8566AB Retrofit Kit (formerly HP 8566A+OlK Retrofit Kit).
PAGE 19
‘lhble l-l. Recommended Test Equipment (1 of 6) Critical Specifications for Equipment Substitution Instrumenl Recommended Perf. Adj. Model Test SIGNAL SOURCES HP 8340A/B X X Synthesized Frequency: 2 - 18 GHz Signal Stability: ~5 x lo-lo Generator HP 8672A X X Frequency Frequency: 200 Hz to 80 MHz Synthesizer Stability: fl x IO-“/day Amplitude Range: + 13 to -86 dBm with 0.01 dB resolution Attenuator Accuracy: < f0.
PAGE 20
‘able l-l. Recommended Test Equipment (2 of 6) Instrument Critical Specifications for Equipment Substitution Recommenda Model Perf Test X ANALYZERS - Adj X Spectrum Analyzer Frequency: 100 Hz to 2.
PAGE 21
‘Ihble l-l. Recommended Test Equipment (3 of 6) Instrument Critical Specifications for Equipment Substitution Recommended Perf, Model Test Adj METERS Digital Voltmeter Resolution: fO.l mV Range: 0 Vdc to 100 Vdc Input Impedance 100 V Range: 10 M62 HP-IB Compatible DC High Voltage 1000: 1 Divider Probe Impedance: lOM62 HP 3456A or HP 3455A HP 34111A Power Meter Range: -20 dBm to + 10 dBm Accuracy: f0.02dB Power Sensor Frequency: .
PAGE 22
‘Ihble l-l. Recommended Test Equipment (4 of 6) Instrument Critical Specifications for Equipment Substitution Recommended Perf, Adj, Model Test X 1 dB Step Attenuator Steps: 1 dB from 0 to 12 dB Frequency: 20 MHz to 1500 MHz Calibrated to uncertainty error of f(0.02 dB +O.
PAGE 23
‘able l-l. Recommended Test Equipment (5 of 6) Instrument AC Line-Power Source Critical Specifications for Equipment Substitution Recommended Model Perf, Adj. Test California Instr- X (Rx- Option 400) Frequency: 400 Hz Voltage :lOO, 120, 220, or 240 V,, Power: >6OOVA Power Splitter Frequency: 1 MHz to 22 GHz Tracking: ~0.
PAGE 24
‘Ihble l-l. Recommended Test Equipment (6 of 6) Instrument Critical Specifications for Equipment Substitution Recommended Model Perf.
PAGE 25
6X2 18 x 2 18 x 2 kern G 1 1 Extender Board: 20 contacts, 2 rows of 10 85680-60028 2 2 Extender Board: 12 contacts, 2 rows of 6 08505-60109 3 2 Cable: 4-foot long; BNC to SMB snap-on 85680-60093 4 1 Adapter: SMB snap-on male to SMB snap-on male 5 1 PC Board: Display Adjustment Test 85662-60088 6 3 Extender Board: 30 contacts; 2 rows of 15 08505-60041 7 1 Extender Board: 44 contacts; 2 rows of 22 08505-60107 8 1 Extender Board: 50 contacts; 2 rows of 25 85680-60034 9 2 E
PAGE 26
2 Performance Tksts Introduction Verifkation of Specifications The procedures in this section test the instrument’s electrical performance using the Specifications in the Installation and Verification Manual as the performance standards. None of the tests require access to the interior of the instrument.
PAGE 27
‘Ihble 2-1. Performance Test Cross-Reference Function or Characteristic Tested Test No.
PAGE 28
Equipment Required Performance Test Record Note Equipment required for the manual performance tests and adjustments is listed in ‘Ikble l-l, Recommended Test Equipment. Any equipment that satisfies the critical specifications given in the list may be substituted for the recommended model. The Operation Verification Program provides a detailed test record when a printer is used with the controller.
PAGE 29
1. Center Frequency Readout Accuracy ‘l&t Related Adjustments 10 MHz Standard Adjustment Sweep, DAC, and Main Coil Driver Adjustments Specifications For spans n X 5 MHz, f (2% of frequency span + n X 100 kHz + frequency reference error X center frequency). n* 1 Center Frequency 100 Hz to 5.8 GHz 2 5.8 3 GHz to 12.5 GHz 12.5 GHz to 18.6 GHz 4 >18.
PAGE 30
1. Center Frequency Readout Accuracy Test Description A synthesized signal source that is phase-locked to a known frequency standard is used to input a signal to the analyzer. The frequency readout of the analyzer is compared to the actual input frequency for several different frequency settings over the analyzer’s range.
PAGE 31
1. Center Frequency Readout Accuracy Test Figure 2-2. Center Frequency Accuracy Measurement Note 2-6 Performance Tests The spectrum analyzer CENTER FREQUENCY readout may fall outside of the specified limits if the internal frequency reference of the analyzer has not been calibrated within the past year. To eliminate the “frequency reference error X center frequency” error, the analyzer’s 10 MHz Frequency Reference Output (on the rear panel) may be substituted for the frequency standard.
PAGE 32
1. Center Frequency Readout Accuracy Test ‘lhble 2-2.
PAGE 33
2. Frequency Span Accuracy ‘I&t Related Adjustment Specification Sweep, DAC, and Main Coil Driver Adjustments For spans In X 5 MHz, fl% of indicated frequency separation. For spans >n X 5 MHz, f 3% of indicated frequency separation. 1 1 n* 1 Center Frequency 1 100 Hz to 5.8 GHz 2 5.8 GHz to 12.5 GHz 3 12.5 GHz to 18.6 GHz 4 >18.6 GHz * n is the harmonic mixing number, depending on center frequency.
PAGE 34
2. Frequency Span Accuracy Test Equipment Procedure Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A Synthesized Sweeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8340A Adapter, Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . 1250-0780 Adapter, Type N (m) to SMA (f) . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1250 Adapter, SMA Female Connectors . . . . . . . . . . . . . . . . . . . . .
PAGE 35
2. Frequency Span Accuracy Test SPECTRUM ANALYZER SYNTHESIZED SWEEPER 'PUT ADAPTER P AD1APTER Figure 2-4. Wide Span Test Setup 10. Press ~NSTR PRESET) on HP 8340A Synthesized Sweeper. 11. Set the synthesized sweeper to a 4 GHz CW signal and power level of -10 dBm. 12. Press C-1 on the analyzer. 13. Set spectrum analyzer as follows: [CENTER FREQUENCY ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 GH~ (FREQUENCY SPAN) . . . . . . . . . . . . . . . . . . . . . . .
PAGE 36
2. Frequency Span Accuracy Test ‘able 2-4. Wide Span Accuracy Spectrum Analyzer Synthesized Sweeper C E N T E R FREQUENCY I [FREQUENCYSPAN) Low GW High WW MARKER A Frequency Min Actual Max 4GHz 500 MHz 3.800 4.200 388MHz 412 MHz 10GHz 500MHz 9.800 10.200 388 MHz 412 MHz 15GHz 500MHz 14.800 15.200 388MHz 412 MHz 20GHz 500MHz 19.800 20.200 388MHz 412 MHz 4GHz 1 GHz 3.600 4.400 776MHz 824MHz 10GHz 1 GHz 9.600 10.400 776MHz 824 MHz 15GHz 1 GHz 14.600 15.
PAGE 37
3. Resolution Bandwidth Accuracy ‘Ikst Related Adjustment Specification (For instruments with Option 462, refer to Chapter 4.) 3 dB Bandwidth Adjustments f20%, 10 Hz to 1 kHz and 3 MHz bandwidths f lO%, 3 kHz to 1 MHz bandwidths 30 kHz and 100 kHz bandwidth accuracy figures only applicable 190% Relative Humidity. Description Equipment Procedure The 3 db bandwidth for each resolution bandwidth setting is measured with the MARKER function to determine bandwidth accuracy.
PAGE 38
3. Resolution Bandwidth Accuracy Test i Figure 2-5. Resolution Bandwidth Measurement 8. Vary spectrum analyzer settings according to ‘Ihble 2-5. Press SWEEP (SINGLE) and measure the 3 dB bandwidth for each resolution bandwidth setting by the procedure of steps 6 and 7 and record the value in Table 2-5. The measured bandwidth should fall between the limits shown in the table. ‘Ihble 2-5. Bandwidth Accuracy ‘RESJ ~FREQUENCY SPAN] MARKER A Readout of 3 dB Bandwidth 1 Min Actual 3 MHz 5 MHz 2.
PAGE 39
4. Resolution Bandwidth Selectivity YLkst Related Adjustments (For instruments with Option 462, refer to Chapter 4.) 3 MHz Bandwidth Filter Adjustments 21.4 MHz Bandwidth Filter Adjustments Step Gain and 18.
PAGE 40
4. Resolution Bandwidth Selectivity Test 7. Vary spectrum analyzer settings according to Table 2-6. Press SWEEP [SINGLE) and measure the 60 dB bandwidth for each resolution bandwidth setting by the procedure of steps 4 through 6. Record the value in ‘lhble 2-6. 8. Record the 3 dB bandwidths from Table 2-5 in Table 2-6. 9. Calculate the bandwidth selectivity for each setting by dividing the 60 dB bandwidth by the 3 dB bandwidth. The bandwidth ratios should be less than the maximum values shown in Table 2-6.
PAGE 41
4. Resolution Bandwidth Selectivity Test ‘Ihble 2-6.
PAGE 42
5. Resolution Bandwidth Switching Uncertainty Test 5. Resolution Bandwidth Switching Uncertainty TLkst Related Adjustments (For instruments with Option 462, refer to Chapter 4.) 3 MHz Bandwidth Filter Adjustments 21.4 MHz Bandwidth Filter Adjustments Down/Up Converter Adjustments Specification (uncorrected; referenced to 1 MHz bandwidth; 20 to 30” C) I Resolution Bandwidth f2.0 dB f0.8 dB f0.5 dB fl.
PAGE 43
5. Resolution Bandwidth Switching Uncertainty Test Figure 2-7. Bandwidth Switching Uncertainty Measurement able 2-7. Bandwidth Switching Uncertainty 2-18 Performance Tests i o n (MKR A Readout, dB) Allowable Deviation WV D RES) e CFREQUENCY v i a SPANt ] 1 MHz 5 MHz 3 MHz 5 MHz fl.OO 300 kHz 5 MHz f0.50 100 kHz 500 kHz f0.50 30 kHz 500 kHz f0.50 10 kHz 50 kHz f0.50 3 kHz 50 kHz f0.50 1 kHz 10 kHz f0.50 300 Hz 1 kHz f0.50 100 Hz 1 kHz f0.50 30 Hz 200 Hz f0.
PAGE 44
6. Log Scale Switching Uncertainty Test 6. Log Scale Switching Uncertainty Tkst Related Adjustment Specification Description Equipment Procedure Video Processor Adjustments f0.5 dB (uncorrected; 20” to 30°C) The log scale is stepped from 1 dB/DIV to 10 dB/DIV and the variation in trace amplitude from the 1 dB/DIV setting at each step is measured. None required 1. Press @ZZiZj. 2. Key in analyzer settings as follows: [CENTER FREQUENCY ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 45
6. Log Scale Switching Uncertainty Test rp REF -8.8 d0m MKR ATTEN 10 aB 100.001 0 Mr. -9.02 ah 2 aw / CENTER I \ , I , 100.000 MHz RES DW 30 kHt I VW 100 ktiz SPAN 100 Is!42 SWP 20.0 InPPC Figure 2-8. Log Scale Switching Uncertainty Measurement ‘Ihble 2-8. Log Scale Switching Uncertainty I SCALE MKR Amplitude (dB/DIV) PW I Deviation W) Allowable Deviation WV 0 (ref) 0 (ref) f0.5 f0.5 f0.
PAGE 46
7. IF Gain Uncertainty Test 7. IF Gain Uncertainty Tkst Related Adjustments Step Gain and 18.4 MHz Local Oscillator Adjustments 21.4 MHz Bandwidth Filter Adjustments Specification Assuming the internal calibration signal is used to calibrate the reference level at -10 dBm and the input attenuator is fixed at 10 dB, any changes in reference level from the -10 dB setting will contribute to IF gain uncertainty as shown: Uncertainty (uncorrected; 20 to 30°C) Range 0 dBm to -55.9 dBm Res BW 230 Hz, f0.
PAGE 47
7. IF Gain Uncertainty Test Equipment Procedure Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A Adapter, Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-0780 1. Press (j2). 2. Connect CAL OUTPUT to RF INPUT. 3. Press m @. Adjust AMPTD CAL for a MARKER amplitude of -10.00 dBm f0.02 dB. 4. Press @YZZQ 10 dB Gain Steps 5. Set the frequency synthesizer for an output frequency of 20.0010 MHz and an output power level of -2.
PAGE 48
7. IF Gain Uncertainty Test cENTE* I’ I 1 22.021 04 LHI PIES mu I Ill41 I I I van 100 Ye I I I y Pm 2.22 L”, se soa -..e Figure 2-10. IF Gain Uncertainty Measurement ‘Ihble 2-9.
PAGE 49
7. IF Gain Uncertainty Test 2 dB Gain Steps 13. Press [2], ~jG?iTLT) (FJ. 14. Set [REFERENCE LEVEL] to -1.9 dBm. 15. Press MARKER (OFFS. Set (jVloEoj to 100 Hz. 16. Set the frequency synthesizer for an output power level of -3.9 dBm. Set the amplitude increment for 2 dB steps. 17. Press MARKER CPEAK SEARCH), (KJ 18. Set the analyzer REFERENCE LEVEL] and the frequency synthesizer amplitude according to Table 2-10. At each setting, note the MKR A amplitude and record it in the table. ‘Ihble 2-10.
PAGE 50
7. IF Gain Uncertainty Test ‘lhble 2-11. IF Gain Uncertainty, 0.1 dR Steps (REFERENCE WW LEVEL ’ Frequency Synthesize1 Amplitude WW 0.0 -2.00 -0.1 -2.10 -0.2 -2.20 -0.3 -2.30 -0.4 -2.40 -0.5 -2.50 -0.6 -2.60 -0.7 -2.70 -0.8 -2.80 -0.9 -2.90 -1.0 -3.00 -1.1 -3.10 -1.2 -3.20 -1.3 -3.30 -1.4 -3.40 -1.5 -3.50 -1.6 -3.60 -1.7 -3.70 -1.8 -3.80 -1.9 -3.
PAGE 51
7. IF Gain Uncertainty Test 23. Find the largest positive deviation and the largest negative deviation for reference level settings from 0 dBm to -70 dBm in ‘fable 2-9. Also, find the largest positive and negative deviations for the last five settings in the table. I Reference Level Range: A B 0 to -70 dBm -80 to -120 dBm Largest Positive Deviation: dB dB Largest Negative Deviation: dB dB 24.
PAGE 52
8. Amplitude Fidelity Test 8. Amplitude Fidelity Test Related Adjustment Specification (For instruments with Option 857, refer to Chapter 5.) Log Amplifier Adjustments Log: Incremental fO.l dB/dB over 0 to 80 dB display Cumulative 3 MHz to 30 Hz Resolution Bandwidth s&l.0 dB over 0 to 80 dB display (20 to 30°C) sf1.
PAGE 53
8. Amplitude Fidelity Test Equipment Procedure Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A Adapter, Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-0780 Log Fidelity 1. Set the frequency synthesizer for an output frequency of 20.000 MHz and an output power level of + 10 dBm. Set the amplitude increment for 10 dB steps. 2. Connect equipment as shown in Figure 2-l 1. 3. Press [mj on the analyzer.
PAGE 54
8. Amplitude Fidelity Test ‘Ihble 2-12. Log Scale Fidelity Fidelity Error 2 1 Frequency Synthesizer Calibrated MARKER A Amplitude (Column 2 - Column 1) Amplitude Amplitude W) c-1 Step (am) w9 +lO 0 (ref) 0 -10 -10 -20 -20 -30 -30 -40 -40 -50 -50 -60 -60 -70 -70 -80 -80 -90 ip R’EF 0 (ref) 0 (ref) 9.7 dBm ATTEN WKR A 0.000 w-c -i0.00 dB 20 d0 10 dB/ CENTER 20.000 iS0 MHz AES EW 1 kHz VBW i HZ SPAN 0 Hz SWP 300 “em= Figure 2-12.
PAGE 55
8. Amplitude Fidelity Test Linear Fidelity 10. Key in analyzer settings as follows: (VIDEOj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ,300 Hz FREQUENCY SPAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 MHz km, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 MHz 11. Set the frequency synthesizer for an output power level of + 10 dBm. 12.
PAGE 56
9. Calibrator Amplitude Accuracy Test 9. Calibrator Amplitude Accuracy Test Related Adjustment Specification Description CAL OUTPUT Adjustment -10 dBm f0.3 dB; 100 MHz The output level of the calibrator signal is measured with a power meter. SPECTRUM ANALYZER POWER METER POWER SENSOR Figure 2-13. Calibrator Amplitude Accuracy Test Setup Equipment Procedure Power Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..HP436 A Power Sensor . . . . . . . .
PAGE 57
10. Frequency Response ‘Ikst Related Adjustments Specifications Frequency Response Adjustments (Includes input attenuator flatness in the 10 dB setting and mixing mode gain variations, and assumes PRESELECTOR PEAK in current instrument state.) I Flatness (20 to 30°C) Tuned Frequency 100 Hz to 2.5 GHz non-preselected band 4~0.6 dB 2 to 12.5 GHz preselected bands f1.7 dB 12.5 to 18.6 GHz preselected band f2.2 dB 18.6 to 20 GHz preselected band f2.2 dB 20 to 22 GHz preselected band f3.
PAGE 58
10. Frequency Response Test FUNCTION GENERATOR SPECTRUM ANALYZER OUTPUT V,p.p 4 RF INPUT ADAPTER / Figure 2-14. Frequency Response Test Setup (100 Hz to 100 Id&) Note Equipment Equipment listed is for three test setups, Figure 2-14, Figure 2-16, and Figure 2-18. Synthesized Sweeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HP 8340A/B Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A Function Generator . . . . . . .
PAGE 59
10. Frequency Response Test Procedure 100Hzto 1OOkHz 1. Connect CAL OUTPUT to the RF INPUT on the spectrum analyzer. 2. Press C-J, (RECALL) @, MARKER (PEAK SEARCH], and adjust AMPTD CAL for a MARKER amplitude of -10.00 dBm f0.02 dB. 3. Press (-1 on the spectrum analyzer. Connect function generator to analyzer RF INPUT as shown in Figure 2-14. 4. Key in analyzer settings as follows: @TART FREQ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . kHz (sTop- . .
PAGE 60
10. Frequency Response Test Figure 2-15. Frequency Response Measurement (1 kHz to 100 kHz) 12. The closely spaced series of signal peaks on the display defines the analyzer response over this frequency range. The maximum and minimum peak amplitudes should not differ by more than 1.2 dB. The MARKER A function may be used to measure this amplitude difference. Deviation 1 kHz to 100 kHz 13. Press [2-22GHT) on the analyzer. Key in the following settings: [CENTER FREQUENCY) . . . . . . . . . . . . . . . . .
PAGE 61
10. Frequency Response Test 18. Set [CF STEP SIZE) to 100 Hz. Step analyzer (CENTER FREQUENCY) from 100 Hz to 1 kHz with 0J and set function generator FREQUENCY to center signal on display at each step. Press MARKER CPEAK SEARCH) at each frequency. The MKR amplitude should be -2 dBm f0.6 dB. Deviation 100 Hz to 1 kHz 100 kHzt0 4MHz 19. Connect equipment as shown in Figure 2-16. SPECTRUM ANALYZER FREQUENCY SYNTHESIZER Figure 2-16. Frequency Response Test Setup (100 kHz to 60 MHz) 20.
PAGE 62
10. Frequency Response Test 26. Press START SINGLE 50 SEC SWEEP on the frequency synthesizer. Wait for completion of the sweep. 27. Activate MARKER [NORMAL) on the analyzer. Determine minimum and maximum amplitude points by using DATA knob to position the marker. Record the amplitude and frequency for each of the minimum and maximum points in ‘l%ble 2-14. Note Disregard any response 1100 kHz. L REP, ‘?1 dB/ START 0.0 darn ATTLN 10 dB II SWP 20.0 In.*= Figure 2-17.
PAGE 63
10. Frequency Response Test 4MHzto60MHz 28. Press t-1 on the spectrum analyzer. Set the spectrum analyzer controls as follows: [ CENTER FREQUENCY ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 FREQUENCY SPAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 MHZ MHz km, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300 kHz (ENTER dB/DIV_) . . . . . . . . . . . . . . . . . .
PAGE 64
10. Frequency Response Test PDWER UETER \ ADAPTER ’ Q B SENSOR Figure 2-19. Frequency Response Test Setup (60 MHz to 2.5 GHz, 2 to 22 GEIz) 60 MHz to 2.5 GHz 36. Connect equipment as shown in Figure 2-19, with one resistive output of the power splitter connected to the power meter/power sensor, and the second resistive output connected to the spectrum analyzer RF INPUT using an APC 3.5 (m) to Type N (m) adapter.
PAGE 65
10. Frequency Response Test Note lb provide the spectrum analyzer with a 60 MHz to 22 GHz input signal of sufficient flatness for measuring frequency response and absolute amplitude accuracy, the synthesized sweeper must be externally leveled with a power meter, using a relatively slow sweep time (at least 40 seconds). 43. On the spectrum analyzer, key in (2-22J, LSHIFT) TRACE A fjW) t (KSb). Set he spectrum analyzer controls as follows: CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 66
10. Frequency Response Test l~~a,“‘i, -7.0, I POS PK START dBm 6 0 M H z R E S , ATTiN I BW 3 MHz I ‘0 ,dS I 0.a5 dB I VBW 3 MHz S T O P 2 . 5 0 GHz S W P 6 2 . 3 rnsec Figure 2-20. Frequency Response Measurement (60 MHz to 2.5 GHz) 48. On the spectrum analyzer, key in TRACE B LVIEW), TRACE A c-1, MARKER (NORMAL_) and use the DATA knob to position a marker on the highest point on the TRACE B waveform. Record the amplitude and frequency for this maximum point in ‘Iable 2-14.
PAGE 67
10. Frequency Response Test 53. On the synthesized sweeper, key in Icw) 3.0 GHz, CSTART FREQ) 2.0 GHz, @7?FEZT) 3.9 GHz, [SWEEP TIME) 150 s, SWEEP [ml, SWEEP (-1. 54. On the spectrum analyzer, key in TRACE B [CLEAR-WRITE), TRACE B (j-1, (SHIFT) (GHz) (KS/). 55. On the synthesized sweeper, key in [START FREQ), SWEEP [SINGLE] and wait for a sweep to complete (150 seconds) and the SWEEP LED to turn off. As the synthesized sweeper tunes from 2.0 GHz to 3.
PAGE 68
10. Frequency Response Test 67. On the synthesized sweeper, press [cwl and use the ENTRY knob to position the peak of the displayed TRACE A signal at the lowest point on the TRACE B waveform. 68. On the spectrum analyzer, key in CPRESEL PEAK) and wait for the PEAKING! message to clear from the CRT. 69. Repeat steps 66 through 68 until the level of the lowest point on the TRACE B waveform does not change. 70.
PAGE 69
10. Frequency Response Test LEVELING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INT 78. On the synthesized sweeper, press (POWER LEVEL] and adjust the ENTRY knob for a power meter indication of -20.00 dBm f0.03 dB at 321.4 MHz (with the power meter RANGE HOLD switch off). 79. On the synthesized sweeper, key in [POWER LEVEL) (JJ to decrease the output power by 10.0 dB to -30 dBm. 80.
PAGE 70
10. Frequency Response Test ‘Ihble 2-15. Frequency Response (Flatness) 2 3 Spectrum Analyzer Cd and Frequent y Synthesized Sweeper 1 Frequent y Rand START FREQ i0 MHz - 2.5 GHz 60 MHz STOP FREQ 2.5 GHz Power Sensor - 5.8 GHz GHz 3.9 GHz 3 GHz 3.9 GHz 5.8 GHz 5 GHz 2 Spec 5 . 8 - 1 2 . 5 GHz 5 . 8 GHz 9.15 GHz 7 GHz 9.15 GHz 12.5 GHz 11 GHz Spec 12.5 - 18.6 GHz 12.5 GHz 15.55 GHz 14 GHz 15.55 GHz 18.6 GHz 17 GHz spec 18.6 - 20 GHz 18.
PAGE 71
PAGE 72
11. Sweep Time Accuracy Test Procedure 1. Connect equipment as shown in Figure 2-21. 2. Press [mj SWEEP C-1 on the analyzer. 3. Key in the following settings: [CENTER FREQUENCY_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500 MHz ( FREQU ENCY SPAN ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OHz 4. Set up the universal counter as follows: a. Set all front panel keys in “out” position. b. Set POWER switch to ON. c.
PAGE 73
11. Sweep Time Accuracy Test ‘Ihble 2-16. Sweep Time Accuracy, Sweep Times 120 ms Sweep Time LSWEEP TIME] Min Max Measured ms 20 ms 18 ms 22 30 ms 27 ms 33 ms 50 ms 45 ms 55 ms 70 ms 63 ms 77 ms 90 ms 81 ms 99 ms 110 ms 99 ms 121 ms 170 ms 153 ms 187 ms 200 ms 180 ms 220 ms 2s 2.2 s 1.8 s 8. Press MARKER @Z%iQ 9. Use ($J to place the marker at the second vertical graticule. 10. Press (SHIFT), (GZiX~. 11. Set analyzer [SWEEP TIME) to 20 s.
PAGE 74
12. Noise Sidebands Test 12. Noise Sidebands ‘lkst Related Adjustments 100 MHz Voltage-Controlled Crystal Oscillator Adjustments Sweep, DAC, and Main Coil Driver Adjustments M/N Loop Adjustments RF Module Phase Lock Adjustments YTO Loop Adjustments 20/30 Phase Lock Adjustments Specification For Frequency Span 125 kHz (except 100 kHz offset) and Center Frequencies from 100 Hz to 5.8 GHz: Offset from Carrier Sideband Level (dBc/Hz) Description 320 Hz -80 1 kHz -85 10 kHz -90 100 kHz -105 A 5.
PAGE 75
12. Noise Sidebands Test SPECTRUM ANALYZER (SOURCE) ADAPTER ADAPTER L CAUE AssElluv Figure 2-22. Noise Sidebands Test Setup Equipment Procedure Spectrum Analyzer (1ST LO OUTPUT) . . . . . . . . . . . . . . . . . . . HP 8566A/B Adapter, Type N (m) to SMA (f) (2 required) . . . . . . . . . . . . . . .1250-1250 Adapter, Type N (f) to BNC (m) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-0077 Cable Assembly, SMA Male Connectors . . . . . . . . . . . . . . . . . . . .5061-1086 1.
PAGE 76
12. Noise Sidebands Test Figure 2-23. Noise Sidebands Measurement 5. Key in the following on the analyzer under test: (CENTER FREQUENCY ] [ FREQUENCY ...................................... 5.7 GHZ kHz SPAN ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 6. Wait for completion of the sweep (the asterisk * at the upper right of the display will disappear), then press MARKER [PEAK SEARCH), (j-1, CMKR + REF LVL). 7. Change [FREQUENCY SPAN) to 700 Hz.
PAGE 77
12. Noise Sidebands Test 11. A correction factor of 2.5 dB must be added to the value measured in step 9 to compensate for logarithmic amplification and envelope detection. Add this correction, then subtract 10 log (BW,,,) to compute the noise sideband level in dBc referenced to a 1 Hz bandwidth: dBc + 2.5 dB - 10 log(BW enp) = dBcil Hz The result should be < -80 dBc/l Hz. 12. Press (SHIFT) [SWEEP TIMES. 13. Change CFREQUENCY SPAN) to 2.5 kHz. 14. Press [SHIFT) (VlDEoJ G.
PAGE 78
13. Line-Related Sidebands Test 13. Line-Related Sidebands Test Specification I Offset from CarrierI Center Frequency I Sidebands I 1 <360 HZ 100 5.8MHz GHz I -60 100 MHz Hz toto100 - 7 0 dBc I 360 Hz to 2 kHz 1 100 Hz to 100 MHz 1 -75 dBc 1 Option 400: For center frequencies >lOO Hz and ~5.8 GHz: 3 Offset from Carrier Center Frequency Sidebands Description The line-related sidebands are measured on signals of 100 MHz, 2.4 GHz, 2.6 GHz, and 5.7 GHz.
PAGE 79
13. Line-Related Sidebands Test Equipment Procedure 1 Spectrum Analyzer (1ST LO OUTPUT) . . . . . . . . . . . . . . . . HP 8566A/B AC Power Source (Option 400 ONLY) . . California Instruments Model 153T Adapter, Type N (m) to SMA (f) (2 required) . . . . . . . . . . .1250-1250 Adapter, Type N (f) to BNC (m) . . . . . . . . . . . . . . . . . . . . . 1250-0077 Cable Assembly, SMA Male Connectors . . . . . . . . . . . . . . . . .5061-1086 .
PAGE 80
13. Line-Related Sidebands Test Figure 2-25. Line-Related Sidebands Measurement 9. The MARKER A amplitude for all line-related sidebands ~360 Hz away from the signal should be c-70 dB. The MARKER A amplitude for all line-related sidebands from 360 Hz to 600 Hz away from the signal should be c-75 dB. Largest Level ~360 Hz dB a Largest Level 360 to 600 Hz H t H z dB at Z 10. Press Cm) (SWEEP TIMES, SWEEP (CONT), TRACE A (-). 11.
PAGE 81
13. Line-Related Sidebands Test 16. Press CsHlFTl (SWEEP TIMEJ*, SWEEP (CONT), TRACE A f--). 17. Change (CENTER FREQUENCY) of both the source and test analyzer to 2.6 GHz. Wait for asterisk (*) to disappear. 18. Press MARKER (OFF), CPRESEL PEAK] and wait for PEAKING! message to disappear from the CRT. 19. Repeat steps 5 through 8. 20. The MARKER A amplitude for all line-related sidebands ~360 Hz away from the signal should be c-60 dB. Largest Level ~360 Hz dB a t H z 21.
PAGE 82
13. Line-Related Sidebands Test 12. Press MARKER [PEAK SEARCH), [al and position the marker at the peaks of the line-related sidebands separated from the signal by multiples of the line frequency; for example, 400 Hz, 800 Hz, 1200 Hz, . . . 13. The MARKER A amplitude for all line sidebands below 2 kHz should be c-55 dB. The A amplitude for sidebands from 2 kHz to 5.5 kHz should be c-65 dB. Largest Level <2 kHz Largest Level <2 kHz to 5.5 kHz H dB a t H z dB at Z 14.
PAGE 83
14. Average Noise Level Test Related Adjustment Specification Last Converter Adjustments Displayed average noise level (0 dB input attenuation, 10 Hz resolution bandwidth): Non-Preselected Preselected c-95 dBm, 100 Hz to 50 kHz c-132 dBm, 2.0 GHz to 5.8 GHz c-112 dBm, 50 kHz to 1 MHz c-125 dBm, 5.8 GHz to 12.5 GHz c-134 dBm, 1 MHz to 2.5 GHz c-119 dBm, 12.5 GHz to 18.6 GHz c-114 dBm, 18.
PAGE 84
14. Average Noise Level Test Figure 2-26. Average Noise Level Measurement 8. Read the noise level from the MARKER amplitude readout. The value should be less than -95 dBm. dBm 9. Key in the following settings: 51 kHz . OHz ......... . . . . . . . . . . . . . . . . . . . 20 ms . . . . . . . . . ............. 10. Wait several seconds for the trace to stabilize (VID AVG >20). Read the amplitude from the MARKER readout. The value should be less than -112 dBm. 11.
PAGE 85
14. Average Noise Level Test lttble 2-18. Average Noise Level (CENTER FREQUENCY] 2-60 Performance Tests MARKER Amplitude Maximum Amplitude WW Pm) 2.0 MHz -134 1.001 GHz -134 2.499 GHz -134 2.510 GHz -132 5.799 GHz -132 5.810 GHz -125 12.499 GHz -125 12.510 GHz -119 18.59 GHz -119 18.61 GHz -114 22.
PAGE 86
15. Residual Responses Test 15. Residual Responses ‘Ikst Specification c-100 dBm, 100 Hz to 5.8 GHz c-95 dBm, 5.8 GHz to 12.5 GHz c-85 dBm, 12.5 GHz to 18.6 GHz c-80 dBm, 18.6 GHz to 22 GHz Description Equipment Procedure The spectrum analyzer is tested for residual responses across its frequency range with no signal applied and 0 dB input attenuation. 50 Ohm Coaxial Termination . . . . . . . . . . . . . . . . . . HP 909A, Option 012 1. Press 1-j. 2. Connect CAL OUTPUT to RF INPUT. Press (RECALL) @J. 3.
PAGE 87
15. Residual Responses Test Figure 2-27. Residual Responses Measurement 8. Look for any residual responses at or above the display line. If a residual is suspected, press SWEEP C-j again and see if the response persists. A residual will persist on repeated sweeps, but a noise peak will not. Any residual responses must be below the display line. dBm at Largest Residual Level H Z 9. If a response appears to be marginal, perform the following check to determine whether or not it exceeds the specification: a.
PAGE 88
15. Residual Responses Test 11. Follow the procedure of steps 7 through 9 to determine if there are any residuals >-lo0 dBm in this frequency range. Largest Residual Level H dBm at Z 12. Key in the following settings: (jREsj . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 kHz [V’DEOBW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 kHz START FREQ) . . . . . . . . . . . . . . . . . . . . . .
PAGE 89
15. Residual Responses Test 20. Set the display line at -85 dBm. 21. Check for residual responses x-85 dBm by using steps 7 through 9. Largest Residual Level H dBm at Z 22. Key in the following: @TART FREQ] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18.5 GHz [sTopI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..2 2 GHz 23. Set the display line at -80 dBm. 24.
PAGE 90
16. Harmonic and Intermodulation Distortion Test 16. Harmonic and Intermodulation Distortion Test Specification Second Harmonic Distortion Center Frequency Level at Mixer Harmonic Distortion 50 MHz to 700 MHz S-40 dBm <-80 dBc s-40 dBm <-70 dBc s-10 dBm <-100 dBc Non-Preselected 100 Hz to 2.5 GHz Non-Preselected 2 to 22 GHz Preselected Third Order Intermodulation Distortion Third-Order Intercept (TOI): > +5 dBm, 100 Hz to 5 MHz > +7 dBm, 5 MHz to 5.8 GHz > +5 dBm, 5.8 GHz to 18.
PAGE 91
16. Harmonic and Intermodulation Distortion Test SPECTRUM ANALYZER SYNTHESIZE0 WEEPER ‘TER ‘TER ADAPTER L P F (PI0 WHZl L P F 11200 M H Z ) - - - - - - ----_ Figure 2-28. Harmonic Distortion Test Setup Note Equipment Procedure 2-66 Performance Tests Equipment listed is for two test setups, Figure 2-28 and Figure 2-29. Synthesized Sweeper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8340A Synthesized Signal Generator . . . . . . . . . . . . . . . . . . .
PAGE 92
16. Harmonic and Intermodulation Distortion Test Harmonic Distortion 1. Set the synthesized sweeper for an output CW frequency of 230.00 MHz and an output level of approximately -30 dBm. 2. Press C2J on the analyzer. Key in the following settings: CCENTER FREQUENCY ] ( FREQUENCY ( REFERENCE ..................................... 230 MHz SPAN ] ......................................... 100 kHz LEVEL ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -30 dBm 3.
PAGE 93
16. Harmonic and Intermodulation Distortion Test 18. Press @ZZi%J on the analyzer. Key in the following: &ENTER FREQUENCY_) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CFREQUENCY SPAN) ......................................... 19. Press MARKER 20. Set (PEAK (FREQUENCY SPAN) I-), [ SEARCH), 7.2 GHz 100 kHz (GiCCXF]. to 10 kHz. Press MARKER [PEAK SEARCH), MKR/A+ STP SIZE . 21.
PAGE 94
16. Harmonic and Intermodulation Distortion Test 30. Set the other synthesized source RF OUTPUT switch to ON and adjust the output power level for a power meter indication of -25.00 dBm f0.20 dB. Set both synthesized source RF OUTPUT switches to the ON position (power meter reading should be approximately -22 dBm). 31. Connect output of power divider to analyzer RF INPUT as shown in Figure 2-29.
PAGE 95
16. Harmonic and Intermodulation Distortion Test 36. Wait for completion of the sweep, then press MARKER (PEAK SEARCH]. Record the MKR A amplitude: dB. 37. Press @J three times to tune to the third order product at 2101.5 MHz. Wait for completion of the sweep, then press MARKER SPEAK SEARCH]. Record the MKR A amplitude: dB. 38. Choose the smallest MKR A amplitude in steps 36 and 37. Record its absolute value: dB. (For example, if one MKR A amplitude is -82 dB and the other is -79 dB, record +79 dB.
PAGE 96
16. Harmonic and Intermodulation Distortion Test . - - - -- --- 2f1-1, f2 ‘I ---r 212-f, FREQUENCY Figure 2-30. Third Order Intermodulation Products 41. Set one synthesizer to 3999.500 MHz, the other to 4000.500 MHz. 42. Connect the output of the power divider to the power sensor as shown in Figure 2-29. 43. Set RF OUTPUT switch on both synthesizers to the OFF position. Set output levels of synthesizers according to the procedure of steps 29 and 30. 44.
PAGE 97
16. Harmonic and Intermodulation Distortion Test 49. Press MARKER @. Activate [CENTER FREQUENCY) and press (JJ once to tune to the third order product at 3998.5 MHz. Wait for completion of the sweep. 50. Press MARKER [PEAK SEARCH) Record the MKR A amplitude: dB 51. Press @) three times to tune to the third order product at 4001.5 MHz. Wait for completion of the sweep, then press MARKER (PEAK SEARCH]. Record the MKR A amplitude: dB. 52. Choose the smallest MKR A amplitude in steps 50 and 51.
PAGE 98
17. Image, Multiple, and Out of Rand Responses Test 17. Image, Multiple, and Out of Band Responses Tkst Description Image and out-of-band responses are checked by setting the analyzer center frequency to several frequencies across the analyzer range and tuning a leveled signal source to the frequencies determined by the tuning equation, Fsiz = nFLof FIF.
PAGE 99
17. Image, Multiple, and Out of Rand Responses Test Procedure 1. Connect equipment as shown in Figure 2-31 with the synthesized sweeper RF OUTPUT connected to the analyzer input. 2. Press INSTR PRESET on the synthesized sweeper. Key in the following sweeper settings: CW FUNCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3000.000 MHz POWER LEVEL .......................................... 0.0 dBm 3. Press (2) on the analyzer.
PAGE 100
17. Image, Multiple, and Out of Band Responses Test ‘I&ble Z-20. Image and Out-of-Rand Response 1 Spectrum Analyze]r ISynthesized Sweeper r [CENTER FREQUENCY]I Frequency WW (MW 3 6 9 12 5 7 9 1 3642.800 6321.400 6964.200 2517.900 3160.700 5357.200 4017.900 4660.700 8357.200 112696.500 I13339.300 5517.900 6160.700 1-1357.200 1.7196.500 1 7839.300 4571.500 5214.300 9464.300 1 0107.100 1 4357.200 5238.100 5880.900 1 0797.700 1 1440.500 1 6357.200 4348.300 4991.100 9017.900 9660.700 1 3687.600 1 4330.
PAGE 101
17. Image, Multiple, and Out of Rand Responses Test 9. Repeat steps 4 through 9 for all remaining (CENTER FREQUENCY] and synthesized sweeper settings in Table 2-20. Steps 4 through 8 need only be done once for each (CENTER FREQUENCY) setting. 10. Set the synthesized sweeper for an output CW frequency of 5700.000 MHz. 11. Key in the following analyzer settings: (CENTER ...................................... FREQUENCY ) ( REFERENCE 5.7 GHZ LEVEL ] ........................................ 0.0 dBm 12.
PAGE 102
18. Gain Compression Test 18. Gain Compression Wst Specification Description cl.0 dB, 100 Hz to 22 GHz with s-5 dBm at the input mixer Gain compression is measured by changing the power level at the spectrum analyzer input mixer from -15 dBm to -5 dBm (2 to 22 GHz). The displayed signal level will change by less than 10 dB, indicating gain compression of the input mixer.
PAGE 103
18. Gain Compression Test OUTPUT LEVEL RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 dBm Note Care should be taken to disturb the cable assembly as little as possible, since flexing may cause a change in the measured power level. The power sensor should be placed near the spectrum analyzer input to minimize flexing when the cable is moved. 3. Connect equipment as shown in Figure 2-32, with output of synthesizer connected to power sensor.
PAGE 104
18. Gain Compression Test 16. Set synthesizer to 3000.000 MHz. Connect cable to power sensor and adjust output level of synthesizer for an indication of -15.00 f0.05 dB on the power meter. Reconnect cable to the spectrum analyzer input. 17. Key in the following settings: 3 GHZ MHz & . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OdB [CENTER FREQUENCY) ........................................ FREQUENCY SPAN) . . . . . . . . . . . . . . . .
PAGE 105
18. Gain Compression Test 30. Connect cable to power sensor and adjust output level of synthesizer for a power meter indication of -5.00 ho.02 dB. Reconnect cable to spectrum analyzer input. 31. Change [REFERENCE LEVEL) to -5 dBm. Record the MKR A amplitude: dB. 32. Subtract the value recorded in step 9 from the value obtained dB. The in step 31 to find the gain compression: result should be >- 1.0 dB (less than 1 dB compression). 33. Disconnect cable from the spectrum analyzer RF INPUT.
PAGE 106
19. 1st LO Output Amplitude Test 19. 1st LO output Amplitude Test Specification Description > + 5 dBm from 2.3 GHz to 6.1 GHz The power level at the 1ST LO OUTPUT connector is measured as the first LO is swept over its 2.3 GHz to 6.1 GHz range. SPECTRUM B ANALYZER SENSOR Figure 2-33. 1st LO Output Amplitude Test Setup Equipment Procedure Power Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..HP436A Power Sensor . . . . . . . . . . . . . . . . . .
PAGE 107
20. Sweep + Tune Out Accuracy List Specification Description -1 V/GHz X Center Frequency (GHz) f(2% + 10 mV) The spectrum analyzer is set to zero frequency span and the SWEEP + TUNE OUT auxiliary output is measured with a voltmeter as the analyzer is tuned across its frequency range. SPECTRUM ANALYZER DIGITAL VOLTMETER Figure 2-34. Sweep + Tune Out Accuracy Test Setup Equipment Procedure Digital Voltmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A 1.
PAGE 108
20. Sweep + Tune Out Accuracy Test ‘able 2-22. Sweep + Tune Out Accuracy Voltmeter Reading (Volts) CENTER FREQUENCY Min 1 Actual I Max 0 Hz -0.010 + 0.010 1 MHz -0.011 + 0.009 MHz -0.022 -0.002 130 MHz -0.143 -0.117 670 MHz -0.693 -0.647 1.3 GHz - 1.336 -1.264 5.7 GHz -5.824 -5.576 12.5 GHz -12.760 -12.240 18.6 GHz -18.982 -18.218 22 GHz -22.450 -21.
PAGE 109
21. Fast Sweep Time Accuracy YLkst (<20 ms) Related Adjustment Specification Description None flO% for sweep times 1100 seconds The triangular wave output of a function generator is used to modulate a 500 MHz signal which is applied to the spectrum analyzer RF INPUT. The signal is demodulated in the zero span mode to display the triangular waveform. Sweep time accuracy for sweep times ~20 ms is tested by checking the spacing of the signal peaks on the displayed waveform.
PAGE 110
21. Fast Sweep Time Accuracy Test (~20 ms) 5. Press MARKER 6. [PEAK SEARCH), (MKR], loFF). Set [FREQUENCY SPAN] to 0 Hz, (RES] to 3 MHz, [VlDEoj to 3 MHz, and press TRIGGER [VIDEO). 7. Set synthesized sweeper for an amplitude-modulated output. 8. Set function generator controls as follows: FUNCTION . . . . . AMPLITUDE . . . . OFFSET . . . . . . . . . . . SYM . . . . . . . . . . . . . . TRIGGER PHASE . MODULATION . . . . .. .. .. .. . .. .. .. .. .. .. .. . .. .. . . .. .. . .. . . . . . . .
PAGE 111
21. Fast Sweep Time Accuracy Test (~20 ms) ‘Jhble 2-23. Fhst Sweep Time Accuracy (~20 ms) SWEEP TIME ] 2-86 Performance Tests Function Generator Frequency Sweep Time Error (divisions) wa 5 ms 2.00 f0.02 2 ms 5.00 f0.05 1 ms 10.0 zto. 1 200 ps 50.0 f0.
PAGE 112
22. Frequency Reference Error Test 22. Frequency Reference Error Test Related Adjustment Specification 10 MHz Standard Adjustment Aging Rate:
PAGE 113
22. Frequency Reference Error Test FREQUENCY STANDARD ElECTRONiC COUNTER SPECTRUM ANALYZER Figure 2-37. Frequency Reference Test Setup Equipment Procedure Electronic Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 5345A 1, 2, 5, or 10 MHz Frequency Reference with again rate
PAGE 114
Table 2-24. Performance Tkst Record Hewlett-Packard Company Model HP 8566B Tested by Report No. Serial No.
PAGE 115
Tkst 1.
PAGE 116
Test 2. Frequency Span Accuracy Test Test 2. Frequency Span Accuracy Test T Step 7. Narrow Span Accuracy Spectrum Analyzer Frequency Synthesizer 1 MARKER A Frequency High (W Min 20 kHz 39,992,ooo 40,008,OOO 15.84 kHz 16.16 kHz 50 kHz 39,980,OOO 40,020,OOO 39.60 kHz 40.40 kHz 150 kHz 39,940,ooo 40,060,OOO 118.80 kHz 121.20 kHz 200 kHz 39,920,ooo 40,080,OOO 158.4 kHz 161.6 kHz 1 MHz 39,600,OOO 40,400,000 792.00 kHz 808.00 kHz 2 MHz 39,200,000 40,800,OOO 1.584 MHz 1.
PAGE 117
Test 3. Resolution Bandwidth Accuracy Test Step 8. Bandwidth Accuracy MARKER A Readout of 3 dB Bandwidth 1 Min 2-92 Performance Tests Actual 3 MHz 5 MHz 2.400 MHz 3.600 MHz 1 MHz 2 MHz 900 kHz 1.100 MHz 300 kHz 500 kHz 270.0 kHz 330.0 kHz 100 kHz 200 kHz 90.0 kHz 110.0 kHz 30 kHz 50 kHz 27.00 kHz 33.00 kHz 10 kHz 20 kHz 9.00 kHz 11.00 kHz 3 kHz 5 kHz 2.700 kHz 3.300 kHz 1 kHz 2 kHz 800 Hz 1.
PAGE 118
Test 4. Resolution Bandwidth Selectivity Test 4. Resolution Bandwidth Selectivity r Step 9.
PAGE 119
lkst 5. Resolution Bandwidth Switching Uncertainty 2-94 Performance Tests Step 5. Bandwidth Switching Uncertainty Deviation (MKR A Readout, dB) Allowable Deviation WV :RES- FREQUENCY SPAN) 1 MHz 5 MHz 3 MHz 5 MHz fl.OO 300 kHz 5 MHz f0.50 100 kHz 500 kHz f0.50 30 kHz 500 kHz kO.50 10 kHz 50 kHz Ito. 3 kHz 50 kHz f0.50 1 kHz 10 kHz f0.50 300 Hz 1 kHz f0.50 100 Hz 1 kHz f0.50 30 Hz 200 Hz f0.80 10 Hz 100 Hz f2.
PAGE 120
Test 6. Log Scale Switching Uncertainty Test lkst 6. Log Scale Switching Uncertainty Test Step 6. Log Scale Switching Uncertainty SCALE MKR Amplitude (dB/DIV) Wm) 1 2 5 10 I Deviation WV 0 (ref) Allowable Deviation (ml I I I 0 (ref) f0.5 f0.5 f0.
PAGE 121
‘I&t 7. IF Gain Uncertainty Step 12. IF Gain Uncertainty, 10 dB Steps [REFERENCE LEVEL) VW Frequency (VlDEo] Deviation Synthesizer (Marker A (W Amplitude Amplitude Wm) @J% 0 -2 100 -10 -12 100 -20 -22 100 -30 -32 100 -40 -42 100 -50 -52 100 -60 -62 10 -70 -72 10 -80 -32 100 -90 -42 100 -100 -52 10 -110 -62 10 -120 -72 10 0 (ref.) ISHIFT) ( ENTER df3pvJ Step 18.
PAGE 122
Test 7. IF Gain Uncertainty Step 22. IF Gain Uncertainty, 0.1 dB Steps [ REFERENCE Wm) LEVEL ] Frequency Synthesizer Amplitude ww 0.0 -2.00 -0.1 -2.10 -0.2 -2.20 -0.3 -2.30 -0.4 -2.40 -0.5 -2.50 -0.6 -2.60 -0.7 -2.70 -0.8 -2.80 -0.9 -2.90 -1.0 -3.00 -1.1 -3.10 -1.2 -3.20 -1.3 -3.30 -1.4 -3.40 -1.5 -3.50 -1.6 -3.60 -1.7 -3.70 -1.8 -3.80 -1.9 -3.
PAGE 123
Test 7. IF Gain Uncertainty Steps 23 through 28. Steps Min Measured Max 23. Recorded deviations from step 12. Largest Positive 0 to -70 dBm Largest Negative 0 to -70 dBm Largest Positive -80 to -120 dBm Largest Negative -80 to -120 dBm 24. Recorded deviation from steps 18 and 22. Largest Positive step 18 Largest Negative step 18 Largest Positive step 22 Largest Negative step 22 25. 0.6 dB Sum of Positive Deviations of steps 23 and 24 26. Sum of Negative Deviations of steps 23 and 24 -0.6 dB 27. 1.
PAGE 124
lkst 8. Amplitude Fidelity l&t 8. Amplitude Fidelity Step 6. Log Scale Fidelity 1 Frequency 2 Fidelity Error Cumulative Cumulative Synthesizer Calibrated MARKER A Amplitude :Column 2 - Column 1) Error Error Amplitude Amplitude 0 to 80 dB 0 to 90 dB WV P9 Step WW WV (9 + 10 0 (ref) 0 -10 -10 -20 -20 -30 -30 -40 -40 -50 -50 -60 -60 -70 -70 -80 -80 -90 0 (ref) 0 (ref) sk1.0 dB sf1.5 dB Step 14.
PAGE 125
Test 9. Calibrator Amplitude Accuracy Step 2. CAL OUTPUT Level Min 1 Cal OUTPUT level I- 10.30 dB 1 2-100 Performance Tests Measured Max I-9.
PAGE 126
Test 10. Frequency Response Test Test 10. Frequency Response ‘I&t Step 12 Min Measured Max 1.2 dB Deviation 1 kHz to 100 kHz Step 18 Signal Level Min 100 Hz -1.4 dB -2.6 dB 200 Hz -1.4 dB -2.6 dB 300 Hz -1.4 dB -2.6 dB 400 Hz -1.4 dB -2.6 dB 500 Hz -1.4 dB -2.6 dB 600 Hz -1.4 dB -2.6 dB 700 Hz -1.4 dB -2.6 dB 800 Hz -1.4 dB -2.6 dB 900 Hz -1.4 dB -2.6 dB 1 kHz -1.4 dB -2.6 dB Measured Max Deviation 100 Hz to 1 kHz 1.2 dB Steps 27, 35 and 49. 100 Hz to 2.
PAGE 127
Test 10. Frequency Response Test ‘Bble 2-24. Frequency Response (Flatness) 2 Spectrum Analyzer and Synthesized Sweeper 1 Frequent y Rand START FREQ MHz - 2.5 GHz 60 MHz STOP FREQ 2.5 GHz 3 Cal Frequent y Power Sensor - 5.8 GHz 2 GHz 3.9 GHz 3 GHz 3.9 GHz 5.8 GHz 5 GHz Spec i.8 - 12.5 GHz 5.8 GHz 9.15 GHz 7 GHz 9.15 GHz 12.5 GHz 11 GHz Spec 2.5 - 18.6 GHz 12.5 GHz 15.55 GHz 14 GHz 15.55 GHz 18.6 GHz 17 GHz Spec 18.6 - 20 GHz 18.
PAGE 128
Test 11. Sweep Time Accuracy Test 11. Sweep Time Accuracy Step 6. Sweep Time Accuracy, Sweep Times 220 ms Sweep Time [ SWEEP TIME) Min 20 ms 18 ms 22 ms 30 ms 27 ms 33 ms 50 ms 45 ms 55 ms 70 ms 63 ms 77 ms 90 ms 81 ms 99 ms 110 ms 99 ms 121 ms 170 ms 153 ms 187 ms 200 ms 180 ms 220 ms 1.8 s 2.2 s 2s I I ( SWEEP Measured Max Step 12.
PAGE 129
‘I&t 12. Noise Sidebands lkst Steps ~Min Measured Max 11. Noise Sideband Level 320 Hz offset -80 dBc 16. Noise Sideband Level 1 kHz offset -85 dBc 2 1. Noise Sideband Level 10 kHz offset -90 dBc 26.
PAGE 130
Test 13. Line-Related Sidebands Tkst 13. Line-Related Sideb nds Steps Min Measured Max 9. Line-Related Sidebands Levels for 100 MHz signal Largest level ~360 Hz away from signal -dB a t H z Largest level 360 Hz to 600 Hz away from signal -dB a t H z -75 dBm -dB a t H z -60 dBm -dB a t H z - 6 0 dB -dB a t H z - 6 0 dB Largest level ~2 kHz away from signal -dB a t H z - 5 5 dB Largest level 2 kHz to 5.5 kHz away from signal -dB a t - H z - 6 5 dB - 7 0 dB 15.
PAGE 131
‘I&t 14. Average Noise Level Steps I Min Measured Max 8 and 10. Marker Amplitude Readout 100 Hz -95 dBm 51 kHz -112 dBm Step 11. Average Noise Level CENTER FREQUENCY] 2-106 Performance Tests MARKER Amplitude Maximum Amplitude ww tam) 2.0 MHz -134 1.001 GHz -134 2.499 GHz -134 2.510 GHz -132 5.799 GHz - 132 5.810 GHz -125 12.499 GHz -125 12.510 GHz -119 18.59 GHz -119 18.61 GHz -114 !2.
PAGE 132
Test 15. Residual Responses II&t 15. Residual Response! - Steps MinI - Measured MaX 8. Residual Responses 0 Hz to 1.5 GHZ Largest Residual Level -dBm a t H z -100 dBm -dBm a t H z -100 dBm -dBm a t H z -100 dBm -dBm a t H z -95 dBm -dBm a t H z -95 dBm -dBm a t H z -95 dBm -dBm a t H z -85 dBm -dBm a t H z -80 dBm 11. Residual Responses 1.4 to 2.5 GE& Largest Residual Level 13. Residual Responses 2.4 to 5.8 GHz Largest Residual Level 15. Residual Responses 5.7 to 6.
PAGE 133
‘I&t 16. Harmonic And Intermodulation Distortion Steps Min Max 8. Second Harmonic Level of 230 MHz -80 dBc 15. Second Harmonic Level of 800 MHz -70 dBc 25. Second Harmonic Level of 7200 MHz -100 dBc 40. TO1 for signals of 2099.5 and 2100.5 MHz +7 dBm 54. TO1 for signals of 3999.5 and 4000.5 MHz +7 dBm 55. TO1 for signals of 8999.5 and 9000.5 MHz +5 dBm TO1 for signals of 13999.500 and 14000.
PAGE 134
Test 17. Image, Multiple, and Out-of-Rand Responses Test 17. Image, Multiple, and Out-of-Band Responses .1 Step 8. Image and Out-of-Rand Response Spectrum Analyzer Synthesized Sweeper Frequency (CENTER FREQUENCY) (GW (MW 3 6 9 12 15 17 3642.800 6321.400 6964.200 2517.900 3160.700 5357.200 4017.900 4660.700 8357.200 12696.500 13339.300 5517.900 6160.700 11357.200 17196.500 17839.300 4571.500 5214.300 9464.300 10107.100 14357.200 5238.100 5880.900 10797.700 11440.500 16357.
PAGE 135
Test 17. Image, Multiple, and Out-of-Rand Responses Step 8. Image and Out-of-Rand Response (continued) Spectrum Analyzer Synthesized Sweeper [CENTER FREQUENCY] Frequency WW WW T Displayed Spurious Amplit [de Measured Maximum ww WC) 4348.300 4991.100 9017.900 9660.700 13687.600 14330.400 18357.200 4848.300 5491.100 10017.900 10660.700 15187.600 15830.400 20357.200 -60 -60 -60 -60 -60 -60 -60 -60 -60 -60 -60 -60 -60 -50 Step 17.
PAGE 136
Test 18. Gain Compression Wst 18. Gain Compression Steps 14. Gain Compression for input -10 to 0 dBm at 2 GHz Min -1.0 dB 27. Gain Compression for input -15 to -5 dBm at 3 GHz -1.0 dB 36. Gain Compression for input -15 to -5 dBm at 9 GHz -1.
PAGE 137
Test 19. 1st LO Output Amplitude Steps Min 4.
PAGE 138
Test 20. Sweep + Tune Out Accuracy Test 20. Sweep + Tune Out Accuracy Step 3. Sweep + Tune Out Accuracy Voltmeter Reading (Volts) CENTER FREQUENCY Min Actual 1 Max 0 Hz -0.010 + 0.010 1 MHz -0.011 + 0.009 MHz -0.022 -0.002 130 MHz -0.143 -0.117 670 MHz -0.693 -0.647 1.3 GHz -1.336 -1.264 5.7 GHz -5.824 -5.576 12.5 GHz -12.760 -12.240 18.6 GHz - 18.982 -18.218 22 GHz -22.450 -21.
PAGE 139
‘l&t 21. Fast Sweep Time Accuracy (< 20 ms) Step 10. Fhst Sweep Time Accuracy (~20 ms) Function Generator Frequency (W) 2.00 f0.02 5.00 f0.05 10.0 fO.1 50.0 f0.
PAGE 140
Test 22. Frequency Reference Error Test Test 22. Frequency Reference Error T&t Steps IMinI Measured I Max I 4. Initial Frequency 1 0 . M H z 5. Frequency after 24 hours 1 0 . M H z 6. Difference between 4 and 5 H Z 0.
PAGE 141
3 Adjustments Introduction Warning The procedures in this section are for the adjustment of the instrument’s electrical performance characteristics. The procedures require access to the interior of the instrument and therefore should only be performed by qualified service personnel. Refer to S’uJZ%z/ Considerations in this introduction. 1. Low-Voltage Power Supply Adjustments . . . . . . . . . . . . . . . . . . . . . .3-25 2. High-Voltage Adjustment (SN 3001A and Below) ............. 3-31 2.
PAGE 142
Safety Considerations Warning Although this instrument has been designed in accordance with international safety standards, this manual contains information, cautions, and warnings which must be followed to ensure safe operations and to retain the instrument in safe condition. Service and adjustments should be performed only by qualified service personnel. Adjustments in this section are performed with power supplied to the instrument while protective covers are removed.
PAGE 143
Factory-Selected Components Factory-selected components are identified with an asterisk (*) on the schematic diagram. For most components, the range of their values and functions are listed in ‘Iable 3-3, Factory-Selected Components. Part numbers for selected values are located in ‘Iable 3-4 through ‘Iable 3-6, Standard Value Replacement components. Related Adjustments Any adjustments which interact with, or are related to, other adjustments are indicated in the adjustments procedures.
PAGE 144
‘Ihble 3-1.
PAGE 145
‘Ihble 3-2. Adjustable Components Reference Designator Adjustment Name Adjustment Number Adjustment Function AlA2C308 AlA2R308 AlA2R319 c307 ZHF GAIN INT GAIN 3 3 3 AlA2R409 AlA2R426 AlA2R427 AlA2R437 AlA2R440 AlA2R512 AlA2R513 AlA2R515 3 AlA2R517 FOCUS COMP T/B FOC TB CTR R/L FOC R/L CTR ORTHO 3D INTENSITY LIMIT ASTIG 3 Adjusts rise and fall times of Z axis amplifier pulse. Adjusts rise and fall times of Z axis amplifier pulse. Sets adjustment range of front-panel INTENSITY control.
PAGE 146
‘lhble 3-2. Adjustable Components (continued) Adjustment Name idjustmenl t Number A3AlR34 SWEEP OFFSET 25 A3A2R12 LL THRESH 25 A3A2R50 A3A2R5 1 X S&H Y S&H 25 25 A3A3Rl A3A3R2 A3A3R4 A3A3R5 A3A3R6 X EXP Y EXP X GAIN Y GAIN XLL 25 25 25 25 25 A3A3R7 XSL 25 A3A3R8 A3A3R9 A3A3R43 YSL YLL YOS 25 25 25 A3A8R5 A3A8R6 GAIN OFFS 23 23 Adjusts high end of digitized sweep. Adjusts low end of digitized sweep.
PAGE 147
‘Ihble 3-2. Adjustable Components (continued) Reference Designator Adjustment Number A4A4C9 Adjustment Name SYM A4A4C19 A4A4C20 A4A4C39 LC CTR CTR SYM 8 8 8 A4A4C41 A4A4C43 A4A4C65 LC DIP LC DIP SYM 8 8 8 A4A4C67 A4A4C73 A4A4C74 A4A4R43 A4A4R49 LC CTR CTR CTR LC XTAL 8 8 8 8 8 A4A5ClO FREQ ZERO COARSE 10 A4A5R2 A4A5R32 A4A5R33 A4A5R44 A4A5R5 1 A4A5R54 + 1OV ADJ SGlO CAL SG20- 1 VR SG20-2 10 10 10 10 10 10 Coarse-adjusts 18.
PAGE 148
‘Ihble 3-2. Adjustable Components (continued) Reference Designator Adjustment Name Adjustmen Number A4A7C42 A4A7R30 CTR 10 Hz AMPTD 7 7 A4A7R41 10 Hz AMPTD 7 A4A8C13 SYM 8 A4A8C29 A4A8C32 A4A8C42 CTR LC CTR SYM 8 8 8 A4A8C44 A4A8C46 A4A8C66 A4A8C67 A4A8R6 CTR LC CTR LC DIP LC DIP A20 dB 8 8 8 8 8 A4A8R7 A10 dB 8 A4A8R35 A4ASR40 LC XTAL 8 8 Centers 3 MHz bandwidth filter pole #5. Adjusts 3 MHz bandwidth filter 10 Hz bandwidth amplitude.
PAGE 149
lfdble 3-2. Adjustable Components (continued) Adjustment Function Reference Designator Adjustment Name Adjustment Number AGAlORl A6AlOR9 A6AlOR12 A6AlOR15 A6AlOR18 A6AlOR21 A6AlOR23 A6AlOR25 A6AlOR27 A6AlOR29 A6AlOR31 A6AlOR34 A6AlOR37 A6AlOR40 A6AlOR41 A6AlOR42 A6AlOR70 A6AlOR76 A6AlOR81 IO VE VD vc VB GA GB GC GD GE LRl LR2 LR3 LB1 LB2 LB3 LB4 LR4 GF 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 21 Adjusts 3.3 GHz oscillator drive current. Adjusts mixer bias 18.6 to 22 GHz.
PAGE 150
‘Ihble 3-2. Adjustable Components (continued) Adjustment Name Adjustmen Number E D C B ZERO -9v 21 21 21 21 21 21 Adjusts tracking at 18.6 GHz (18.6 to 22). Adjusts tracking at 12.5 GHz (12.5 to 18.6). Adjusts tracking at 5.8 GHz (5.8 to 12.5). Adjusts tracking at 4 GHz (2 to 5.8). Sets SWEEP + TUNE OUT zero indication. Sets -9 V and +9 V dc reference supplies. A7A2C 1 A7A2C2 A7A2C3 A7A2C4 400 MHz OUT 400 MHz OUT 400 MHz OUT 100 MHz 14 14 14 14 Peaks 400 MHz output signal.
PAGE 151
‘Ihble 3-2. Adjustable Components (continued) Reference Designator Adjustment Name Adjustment Number Al lA5Cl 16 Optimizes sampler output. 16 Optimizes sampler output. Al lA5Rl IMPEDANCE MATCH IMPEDANCE MATCH IF GAIN 13 Adjusts level of 30 MHz output. A16R62 A16R67 A16R68 A16R71 A16R72 OFFSET SWEEPTIME AUX GAIN 2 GAIN 1 13 13 13 13 13 Adjusts scan ramp offset. Adjusts time of sweep ramp. Adjusts AUX OUT sweep ramp. Adjusts frequency span accuracy (YTO sweep).
PAGE 152
‘Ihble 3-2. Adjustable Components (continued) Adjustment Function Adjustment Name Adjustment Number AlA2R31 AlA2R32 ORTHO PATTERN 3 3 AlA2R35 INTENSITY 3 AlA2R36 AlA2R30 LIMIT ASTIG FOCUS GAIN 3 4 Adjusts astigmatism of CRT. Adjusts for optimum focus of CRT display. AlA3R14 FOCUS LIMIT 3 Coarse adjusts CRT focus. AlA4ClO Cl0 3 rise and fall times of X deflection amplifier AlA4Cll Cl1 3 AlA4R7 AlA4R27 AlA4R28 X POSN X GAIN HFGAIN 3 3,4 3 Adjusts pulse. Adjusts pulse.
PAGE 153
‘Ikble 3-3. Fhctory-Selected Components Reference Adjustment Range of Values Designator Procedure (0 or PF) AlA2R9 A3AlR72 A3A2R17 A3A2R2 1 A3A3C27 3 2.87 K to 6.19 K 19.6 K to 42.2 K 121 K to 162 K 10.0 K to 26.1 K Open or 1.0-10.0 A3A3C32 1.0 to 10.0 A3A3R47 A3A3R48 5.0 K to 12.5 K 5.0 K to 12.5 K 562 A4AlRlO A4AlR67 A4A2R18 A4A2R22 A4A2R24 A4A2R36 A4A2R62 44A2R86 44A2R88 44A2R89 44A2R96 44A2R97 44A2R99 to 1.33 K 56.2 K to 825 K 5 to 178 1.96 K to 5.11 K 1 K to 31.6 K 90.9 to 237 5 16.
PAGE 154
‘Ihble 3-3.
PAGE 155
‘Ihble 3-3. Factory-Selected Components (continued) Reference adjustment Designator Procedure Range of Values (0 or PF) A4A7R34 A4A7R35 A4A7R45 A4A7R46 A4A7R56 A4A7R57 A4A7R60 A4A7R66 A4A7R68 A4A7R70 A4A7R72 A4A7R74 A4A7R76 A4A7R78 A4A7R80 A4A7R82 A4A7R84 A4A7R86 A4A7R88 A4A7R90 A4A7R92 A4A7R94 A4A7R96 A4A7R98 A4A7RlOO A4A7R102 A4A7R104 10.0 K to 17.8 10.0 K to 17.8 10.0 K to 17.8 10.0 K to 17.8 7.50 K to 13.3 7.50 K to 13.3 38.3 to 68.1 38.3 to 68.1 100 to 178 383 to 681 1.47 K to 2.61 38.3 to 68.
PAGE 156
‘Ihble 3-3. Fhctory-Selected Components (continued) Reference Adjustment Designator Procedure Range of Values (fl or PP) Function of Component A4A8R19 A4A8R24 A4A8R26 A4A8R29 A4A8R30 A4A8R34 A4A8R36 A4A8R36 A4A8R52 A4A8R55 100 Kl to 1M 0 to 100 3.83 K to 9.09 K 909 to 2.37 K 3.16 K to 8.25 K 100 K to OPEN 100 K to OPEN 10 K to OPEN 3.83 K to 9.09 K 3.16 K to 8.25 K Sets adjustment range of LC amplitude. Adjusts bandwidth shape in 10 kHz bandwidth. Adjusts crystal filter bandwidth.
PAGE 157
‘Ibble 3-3. F&tory-Selected Components (continued) Reference Designatol Adjustmenl Procedure Range of Values (0 or PF) 23.7 to 180 A6A9AlR5 A6A9AlRlf 18 19 A6A9AlR2; 18 56.2 K A6AlOR86 A6AlOR87 A6AlOR88 A6AlOR89 A6AlOR90 A6AlOR91 21 21 21 21 21 21 10 to 40 K 10 to 40 K 10 to 40 K 10 to 40 K 10 to 40 K 10 to 40 K A6Al lR2 21 100 K to 196 K Adjusts band A breakpoint for best flatness. A6A12Cl A6A12C2 A6A12C3 A6A12Cll A6A12C23 A6A12R64 21 21 21 21 21 0.1 to 0.68 PF 0.1 to 0.68 PF OPEN 0.
PAGE 158
Table 3-3. Fhctory-Selected Components (continued) Reference Adjustment Range of Values Designator Procedure (0 or PF) Al lA4R24 Al lA5C22 Al lA5LlO Al lA5R22 348 to 562 16 16 16 130 to 220 pF 2.2 to 3.3 PF 15 to 51.1 62 A13C22 620 to 1300 A15ClO 62 to 91 A16R46 13 Function of Component Sets YTO loop gain crossover to 20 f2 kHz. Sets YTO loop response ~20 MHz. Sets YTO loop response. response Sets YTO loop 20 to 30 MHz. Sets period of microprocessor clock. Sets oscillator frequency to 10 MHz ho.
PAGE 159
able 3-3. Factory-Selected Components (continued) Reference Adjustment Range of Values Designator Procedure (0 or PF) Function of Component Option 462 A4A7R12 A4A7Rl3 A4A7R23 A4A7R24 A4A7R34 A4A7R35 A4A7R45 A4A7R46 A4A7R56 A4A7R57 A4A7R68 A4A7R70 A4A7R76 A4A7R84 A4A7R86 A4A7R92 A4A7R94 A4A7RlOO A4A7R102 A4A8R30 A4A8R55 A4A8C43 A4A9R3 A4A9R6 A4A9R7 A4A9RlO A4A9Rll A4A9R83 A4A9R85 A4A9R86 A4A9R87 5.62 K to 7.5 K 5.62 K to 7.5 K 5.62 K to 7.5 K 5.62 K to 7.5 K 5.62 K to 7.5 K 5.62 K to 7.5 K 5.11 K to 6.
PAGE 160
‘Ihble 3-4. Standard Value Replacement Capacitors r Caoacitors Type: Tubular Range: 1 to 24 pF I’olerance: 1 to 9.1 pF = f0.25 pF 10 to 24 DF = f5% V&he (pF) KP Part Number CD 1.0 1.2 1.5 1.8 2.0 2.2 2.4 2.7 3.0 3.3 3.6 3.9 4.3 4.7 5.1 5.6 6.2 6.8 7.5 8.2 9.1 10.0 11.0 12.0 13.0 15.0 16.0 18.0 20.0 22.0 24.
PAGE 161
‘Ihble 3-5. Standard Value Replacement 0.125 Resistors Resistors Type: Fixed-Film Range: 10 to 464K Ohms Wattage: 0.125 at 125°C Tolerance: f 1 .O% Value (fl) EIP Part Number CD 10.0 11.0 12.1 13.3 14.7 16.2 17.8 19.6 21.5 23.7 26.1 28.7 31.6 34.8 38.3 42.2 46.4 51.1 56.2 61.9 68.1 75.0 82.5 90.
PAGE 162
‘Ihble 3-5. Standard Value Replacement 0.125 Resistors (continued) Resistors Type: Fixed-Film Range: 10 to 464K Ohms Wattage: 0.125 at 125°C lbleran Value (n) HP Fart Number Value (0) BP Fart Number 17.8K 19.6K 21.5K 23.7K 26.1K 28.7K 31.6K 34.8K 38.3K 42.2K 46.4K 51.1K 56.2K 61.9K 68.1K 75.OK 82.5K 90.9K 0698-3136 0698-3157 0757-0199 0698-3158 0698-3159 0698-3449 0698-3160 0757-0123 0698-3161 0698-3450 0698-3162 0757-0458 0757-0459 0757-0460 0757-0461 0757-0462 0757-0463 0757-0464 A.
PAGE 163
‘able 3-6. Standard Value Replacement 0.5 Resistors Resistors Type: Fixed-Film Range: 10 to 1.47M Ohms Watt w e: 0.5 at 125°C TO1 an fl.O% Value (Q: EP Part Number 5 - 10.0 11.0 12.1 13.3 14.7 16.2 17.8 19.6 21.5 23.7 26.1 28.7 31.6 34.8 38.3 42.2 46.4 51.1 56.2 61.9 68.1 75.0 82.5 90.
PAGE 164
‘able 3-6. Standard Value Replacement 0.5 Resistors (continued) Resistors Type: Fixed-Film Range: 10 to 1.47M Ohms Wattage: 0.5 at 125°C To1 ‘an fl.O% Value (ff EIP Part Number iii Value (a) EIP Fart Number 16.2K 17.8K 19.6K 21.5K 23.7K 26.1K 28.7K 31.6K 34.8K 38.313 42.2K 46.4K 51.1K 56.2K 61.9K 68.1K 75.OK 82.5K 90.
PAGE 165
1. Low-Voltage Power Supply Adjustments 1. Low-Voltage Power Supply Adjustments Reference IF-Display Section: AlA f15 V Regulator AlA + 120 V, +5.2 V Regulator (Serial Number Prefix 3004A and above) AlA + 100 V, +5.2 V Regulator (Serial Number Prefix 3001A and below) RF Section: A8 Rectifier Al7 Positive Regulator A 18 Negative Regulator Description The + 15 Vdc power supply is adjusted for the IF-Display Section, and the +22 Vdc and +20 Vdc power supplies are adjusted for the RF Section.
PAGE 166
1. Low-Voltage Power Supply Adjustments Procedure IF-Display Section 1. Position the instrument on its right side with the IF-Display Section facing right, as shown in Figure 3-l. Remove the top cover of the IF-Display Section and the bottom cover of the RF Section. 2. Set the spectrum analyzer LINE switch to ON. The MAINS power-on indicator AlABDSl (red LED) in the IF-Display Section should be lit. See Figure 3-2 or Figure 3-3 for the location of AlABDSl.
PAGE 167
1. Low-Voltage Power Supply Adjustments / , AlAGDSl AlA6TP3 AlA7TP2 AlA7DSl / AlA8DSl AlAGR9 ’ AlA7DS2 AlA6DS2 i AlA7TP3 Figure 3-3. IF-Display Section Adjustments (SN 3004A and Above) 5. Verify that the -15 V indicator AlA6DS2 (yellow LED) is lit. 6. Connect the DVM to AlA6TP4. The DVM indication should be -15.000 f0.050 V dc. The -15 V supply is referenced to the + 15 V supply; therefore, if the -15 V supply is out of tolerance, a circuit malfunction is indicated. 7.
PAGE 168
1. Low-Voltage Power Supply Adjustments RF Section 11. With the LINE switch still ON, the RF Section’s +22 V indicator A8DSl (yellow LED) should be lit. See Figure 3-4. 12. Connect the DVM to A8TPl and the DVM ground lead to chassis ground. Adjust A8R2 +22 V ADJ for a DVM indication of +22.000 f0.020 V dc. Note If A8R2 +22V ADJ does not provide sufficient adjustment range, select a new value for factory-select component A8R6. An increase in the value of A8R6 decreases the voltage at A8TPl.
PAGE 169
PAGE 170
1. Low-Voltage Power Supply Adjustments 24. Connect the DVM to A18TP4. The DVM indication should be -10.0 3~0.1 V dc. The -10 V supply is referenced to the +20 V supply; therefore, if the -10 V supply is out of tolerance, a circuit malfunction is indicated.
PAGE 171
2. High-Voltage Adjustment (SN 3001A and Below) 2. High-Voltage Adjustment (SN 3001A and Below) Note This procedure is for IF-Display Sections with serial number prefixes 3001A and below. The procedure for serial prefixes 3004A and above is located immediately after this procedure. Note This procedure should be performed whenever the AlAll High Voltage Multiplier, AlVl CRT, or AlA High Voltage Regulator Assembly is repaired or replaced.
PAGE 172
2. High-Voltage Adjustment (SN 3001A and Below) DIGITIZING DSCI LLOSCDPE DIGITAL VDLTMTER HI-VDLTAGE SIGNAL ANALYZER Figure 3-5. High Voltage Adjustment Setup Equipment Digital Voltmeter (DVM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A DC High-Voltage Probe (1000: 1 divider) . . . . . . . . . . . . . . . . . . HP 34lllA Display Adjustment PC Board (service accessory) ... HP 85662-60088 Digitizing Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 173
2. High-Voltage Adjustment (SN 3001A and Below) be performed with the DVM manually set to the 100 V range (*OO.OOO on the HP 3456A display). , AlA H I G H VOLTAGE REGULATOR AlA8DSl + AlA7TP3 . AlA6R32 Figure 3-6. Location of High Voltage Adjustments 4. Set the spectrum analyzer LINE switch to ON. Set the front-panel INTENSITY control fully counterclockwise (CRT beam at cut-off) to prevent possible damage to the CRT. 5. Note .the DVM indication at AlA7TP3. DVM Indication: 6.
PAGE 174
2. High-Voltage Adjustment (SN 3001A and Below) 10. Wait at least one minute for capacitors to discharge to a safe level. 11. Remove the protective cover from the AlA High-Voltage Regulator. A label should be visible on the AlA3Tl High-Voltage Transformer. Record the voltage listed on the label for use in step 15. Note If the label is missing, use the nominal value of -3790 Vdc. 12. Connect the high-voltage probe to AlA3TP3. See Figure 3-7 for the location of the test point.
PAGE 175
2. High-Voltage Adjustment (SN 3001A and Below) stabilize and the CRT to normalize. This so$ turn-on will extend CRT life expectancy, particularly if a new CRT has just been installed. 17. Readjust AlA6R32 HV ADJ for a DVM indication equal to the voltage determined in step 15. 18. If a new CRT has just been installed do the following: a. Set the front-panel INTENSITY control so the CRT trace is barely visible. b. Wait an additional 30 minutes for the CRT to normalize. c.
PAGE 176
2. High-Voltage Adjustment (SN 3001A and Below) then set the LINE switch to ON (the INSTR CHECK I LED will light.) 30. Wait approximately 30 seconds for the dc regulator circuits to stabilize again. 31. With the front-panel INTENSITY control fully counter clockwise, adjust AlA2R35 INT LIMIT (clockwise) until a spot is just visible in the lower left corner of the CRT. See Figure 3-8 for the location of the adjustment.
PAGE 177
2. High-Voltage Adjustment (SN 3001A and Below) i ..___ -_...~................~. -250.000 US - ._.. i .._..... 0.00000 s 50.0 us/div .._.........................................--..................... ! 250.000 us 1 f 75.00 v Figure 3-9. CRT Cut-Off Voltage 35. Connect a separate function generator to each of the X and Y inputs of the Display Adjustment Board, as shown in Figure 3-5. Set the function generators as follows: X input Jl: frequency . . wave . . . , , amplitude . .
PAGE 178
2. High-Voltage Adjustment (SN 3001A and Below) 12 VP+, whichever is greater. See Figure 3-10. (The value of V,, was recorded in step 34.) If the front-panel INTENSITY control cannot be set fully clockwise without dropping below this minimum peak-to-peak voltage, then perform the following: a. Set the INTENSITY control fully counter clockwise. b. Set the LINE switch to STANDBY. c. Increase the value of AlA2R9. d. Return to step 34.
PAGE 179
2. High-Voltage Adjustment (SN 3001A and Below) 41. The High-Voltage Adjustment is completed. If an AlA2, AlA4, or AlA assembly has been repaired or replaced, perform adjustment procedure 3, “Preliminary Display Adjustment (SN 3001A and Below)“, and then adjustment procedure 4, “Final Display Adjustments (SN 3001A and Below)“. If the AlA2, AlA4, and AlA assemblies function properly and do not require compensation, proceed directly to adjustment procedure 4, “Final Display Adjustments (SN 3001A and Below)“.
PAGE 180
2. High-Voltage Adjustment (SN 3001A and Below) 4. Connect a jumper wire (insulated wire and two alligator clips) between the shaft of a small screwdriver and the chassis ground lug on the inside of the high-voltage shield. 5. While holding the insulated handle of the screwdriver, touch the grounded blade to the following connections: a. Both brown wires going to the rear of the CRT from AlA via cable harness W2 1. b. The yellow, blue, and orange wires in the same cable as “a. ” above. c.
PAGE 181
2. High-Voltage Adjustment (SN 3004A and Above) 2. High-Voltage Adjustment (SN 3004A and Above) Note This procedure is for IF-Display Sections with serial number prefixes 3004A and above. The procedure for serial prefixes 3001A and below is located immediately before this procedure. Note This procedure should be performed whenever the AlVl CRT or AlA High Voltage Regulator Assembly is repaired or replaced.
PAGE 182
2. High-Voltage Adjustment (SN 3004A and Above) Equipment Digital Voltmeter (DVM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HP 3456A DC High-Voltage Probe (1OOO:l divider) . . . . . . . . . . . . . . . . . . HP 34111A High-Voltage Adjustment Procedure Warning In the following procedure, it is necessary to probe voltages which, if contacted, could cause serious personal injury. Use a nonmetallic alignment tool when making adjustments. Be extremely careful.
PAGE 183
2. High-Voltage Adjustment (SN 3004A and Above) AlA8DSl AlA7TP3 AlA H I G H VOLTAGE REGULATOR AlA6R103 Figure 3-13. Location of High Voltage Adjustments 4. Set the spectrum analyzer LINE switch to ON. Set the front-panel INTENSITY control fully counterclockwise (CRT beam at cut-off) to prevent possible damage to the CRT. 5. Note the DVM indication at AlA7TP3. DVM Indication: 6. Connect the high-voltage probe to the DVM, and connect the probe to AlA7TP3. 7. Note the DVM indication. DVM Indication: 8.
PAGE 184
2. High-Voltage Adjustment (SN 3004A and Above) 11. Remove the protective cover from the AlA High-Voltage Regulator Assembly. A label should be visible on the AlA3Al HighVoltage Assembly. (AlA3Al is mounted on the non-component side of the High-Voltage Regulator Assembly as shown in Figure 3-14.) Record the voltage listed on the label for use in step 15. In cases where more than one voltage is listed on this label, record the value which is closest to -2400 Vdc.
PAGE 185
2. High-Voltage Adjustment (SN 3004A and Above) CRT life expectancy, particularly if a new CRT has just been installed. 17. Readjust AlA6R103 HV ADJ for a DVM indication equal to the voltage determined in step 15. 18. If a new CRT has just been installed do the following: a. Set the front-panel INTENSITY control so the CRT trace is barely visible. b. Wait an additional 30 minutes for the CRT to normalize. c. Readjust AlA6R103 HV ADJ for a DVM indication equal to the voltage determined in step 15. 19.
PAGE 186
2. High-Voltage Adjustment (SN 3004A and Above) Discharge Procedure for High Voltage and CRT Warning The High-Voltage Adjustment procedure does not require the removal or discharge of the AlA High-Voltage Regulator or AlVl CRT assemblies. However, if for any reason the AlA High Voltage Regulator Assembly, the CRT, or the CRT post-accelerator cable must be removed, perform the following procedure to ensure proper safety. This procedure should be performed by qualified personnel only.
PAGE 187
2. High-Voltage Adjustment (SN 3004A and Above) Grounding Wire Figure 3-15. Discharging the CRT Post-Accelerator Cable Note A small bracket and screw secure the AlA High-Voltage Regulator Assembly to the AlAlO Display Motherboard Assembly. The bottom cover of the IF-Display Section must be removed to gain access to this screw prior to removal of the AlA High-Voltage Regulator Assembly.
PAGE 188
3. Preliminary Display Adjustments (SN 3001A and Below) Reference AlAl Keyboard AlA Z-Axis Amplifier AlA X-Deflection Amplifier AlA Y-Deflection Amplifier Note Adjustment 2, “High-Voltage Adjustment,” should be performed before performing the following adjustment procedure. Note Perform this adjustment only if components have been replaced on the AlA Z-Axis Amplifier, AlA X-Deflection Amplifier, or AlA YDeflection Amplifier Assemblies.
PAGE 189
3. Preliminary Display Adjustments (SN 3001A and Below) Procedure X and Y Deflection Amplifier Pulse Response Adjustments 1. Connect a 10: 1 (10 MQ) divider probe to the oscilloscope’s channel 1 input and a 1O:l divider probe to the channel 4 input. 2. On the oscilloscope, press CRECALL] [GK] to perform a soft reset. 3. On the oscilloscope, press (CHAN] more preset probe , select channel 1, and use the front-panel knob to select a 10: 1 probe. 4.
PAGE 190
3. Preliminary Display Adjustments (SN 3001A and Below) AlA AlA AtA / A3A2 Figure 3-17. Location of AlA2, AlA4, AlA5, and A3A2 R22 Hf G A I N IYT GAIN 11 E.2 / \ L ~ooooooooooooooor AlA AlA4/AlA5 GA15 Figure 3-18. AlA2, AlA4, and AlA Adjustment Locations 10. Set the pulse/funtion generator controls as follows: MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NORM Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 191
3. Preliminary Display Adjustments (SN 3001A and Below) 12. Set the oscilloscope controls as follows: Press (CHAN]: Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on amplitude scale ...................................... 10.0 V/div offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..25.0000 V Channel 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 192
3. Preliminary Display Adjustments (SN 3001A and Below) the combined X deflection voltage applied to the CRT. Use the oscilloscope front-panel knob to adjust waveform fl sensitivity for approximately 8 vertical divisions. hp r u n n i n g i . . - 1 2 5 . 0 0 0 ns ..~...............~.... 1 2 5 . 0 0 0 ns 5 0 . 0 ns/div 3 7 5 . 0 0 0 rls 1 f 25.00 v Figure 3-20. Composite X Deflection Waveform 17.
PAGE 193
3. Preliminary Display Adjustments (SN 3001A and Below) OVERSHOOT OVERSHOOl Figure 3-2 1. Rise and Fall Times and Overshoot Adjustment Waveform 19. Connect the oscilloscope channel 1 probe to AlA5El and the channel 4 probe to AlA5E2. See Figure 3-18 for the location of the test points. Connect the output of the pulse/function generator to 52 (Y input) on the Display Adjustment PC board in the A3A2 slot. 20. The Y Deflection Amplifier is identical to the X Deflection Amplifier.
PAGE 194
3. Preliminary Display Adjustments (SN 3001A and Below) Note The pulse/function generator output must be terminated with 50 ohms. Use a BNC tee, a 509 termination, and a BNC female to SMB female adapter. Install the 500 termination as close to the Display Adjustment PC Board as possible. 26. Set the pulse/function generator controls as follows: MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NORM Waveform . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 195
3. Preliminary Display Adjustments (SN 3001A and Below) 32. Use the oscilloscope [@iGJ markers to measure the risetime, falltime, and percent overshoot of the pulse waveform. Rise and falltimes should be less than 50 ns and 90 ns respectively. Overshoot on the rise should be less than 5% (approximately 0.4 divisions). 33. Set the spectrum analyzer LINE switch to STANDBY, and center potentiometers AlA4R7 X POSN and AlA5R7 Y POSN. 34. Disconnect the oscilloscope channel 1 probe from the spectrum analyzer.
PAGE 196
3. Preliminary Display Adjustments (SN 3004A and Above) Reference AlAl Keyboard AlA X, Y, Z Axis Amplifier Note Adjustment Procedure 2, “High-Voltage Adjustment,” should be performed before performing the following adjustment procedure. Note Perform this adjustment only if components have been replaced on the AlA X, Y, Z Axis Amplifier Assembly. Components R117, R217, R308, C104, C109, C204, C209, and C307 are factory adjusted and normally do not require readjustment.
PAGE 197
3. Preliminary Display Adjustments (SN 3004A and Above) Procedure X and Y Deflection Amplifier Pulse Response Adjustments 1. Connect a 10: 1 (10 Ma) divider probe to the oscilloscope’s channel 1 input and a 10: 1 divider probe to the channel 4 input. 2. On the oscilloscope, press [RECALL) [ZK) to perform a soft reset. 3. On the oscilloscope, press (CHAN) more preset probe , select channel 1, and use the front-panel knob to select a 10: 1 probe. 4.
PAGE 198
3. Preliminary Display Adjustments (SN 3004A and Above) A3A2 A3Al Figure 3-24. Location of AlA and A3A2 R 1 2 7 R120 C l 0 9 T P 1 0 5 R 2 2 7 C204 R220 R217 JS TP501 GND c307 Figure 3-25. AlA Adjustment Locations 10. Set the pulse/funtion generator controls as follows: MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NORM Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..pulse Frequency (FRQ) . . . . .
PAGE 199
3. Preliminary Display Adjustments (SN 3004A and Above) 12. Set the oscilloscope controls as follows: Press m): Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .on amplitude scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.0 V/div offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..25.OOOOV Channel 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 200
3. Preliminary Display Adjustments (SN 3004A and Above) the combined X deflection voltage applied to the CRT. Use the oscilloscope front-panel knob to adjust waveform fl sensitivity for approximately 8 vertical divisions. hp r u n n i n g i_,..._......_,........................ 2 0 . 0 V/div 1 2 5 . 0 0 0 ns 5 0 . 0 ns/div 1 f 25.00 v Figure 3-27. Composite X Deflection Waveform 17.
PAGE 201
3. Preliminary Display Adjustments (SN 3004A and Above) 19. Connect the oscilloscope channel 1 probe to AlA2TP104 and the channel 4 probe to AlA2TP105. See Figure 3-25 for the location of the test points. Connect the output of the pulse/function generator to 52 (Y input) on the Display Adjustment PC board in the A3A2 slot. 20. The Y Deflection Amplifier is identical to the X Deflection Amplifier. Repeat steps 12 through 18 for the Y Deflection Amplifier using R127, R120, R117, C104, and C109, respectively.
PAGE 202
3. Preliminary Display Adjustments (SN 3004A and Above) 29. Set the oscilloscope controls as follows: Press (ZiZi): Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on amplitude scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8.00 V/div Press (SHOW]. 30. Adjust the spectrum analyzer front-panel INTENSITY control for 50 V peak-to-peak (6.25 divisions) as indicated on the oscilloscope. See Figure 3-29.
PAGE 203
4. Final Display Adjustments (SN 3001A and Below) 4. Final Display Adjustments (SN 3001A and Below) Reference Description Note Procedure Note AlAl Keyboard Al A2 Z Axis Amplifier AlA X Deflection Amplifier AlA Y Deflection Amplifier This procedure is used to optimize the appearance of the CRT display during routine maintenance or after CRT replacement or minor repairs.
PAGE 204
4. Final Display Adjustments (SN 3001A and Below) 5. For best overall focusing of the display, adjust the following potentiometers in the sequence listed below: a. AlA3R14 FOCUS LIMIT for best focus of graticule lines (long vectors) b. AlA2R36 ASTIG c. AlA2R30 FOCUS GAIN for best focus of annotation (short vectors) 6. Adjust AlA2R31 ORTHO, the front-panel ALIGN control, and AlA2R32 PATT to optimize the orientation and appearance of the rectangular graticule pattern on the CRT display. 7.
PAGE 205
4. Final Display Adjustments (SN 3004A and Above) 4. Final Display Adjustments (SN 3004A and Above) Reference AlAl Keyboard AlA X, Y, Z Axis Amplifiers Description This procedure is used to optimize the appearance of the CRT display during routine maintenance or after CRT replacement or minor repairs. First, the display is adjusted for best focus over the full CRT, then the graticule pattern is adjusted for optimum rectangular display. Equipment Digital Photometer . . . . . . . . . . . . . . . . . . .
PAGE 206
4. Final Display Adjustments (SN 3004A and Above) R120 R220 R512 R513 R319 R426 R437 Figure 3-32. Location of Final Display Adjustments on AlA ‘Ihble 3-6.
PAGE 207
4. Final Display Adjustments (SN 3004A and Above) AlA2R517 ASTIG AlA2R513 3D AlA2R409 FOCUS COMP 9. Press (o--2.5), (REFERENCE LEVEL] and then adjust the reference level to bring the displayed noise to the top division of the graticule ((REFERENCE-LEVEL]). Press (ENTER~~B/DIV) and key in 1 dB/DIV. The noise should now completely fill the CRT graticule pattern, illuminating a large rectangular area. If necessary, adjust the reference level until the graticule pattern is completely filled. 10.
PAGE 208
4. Final Display Adjustments (SN 3004A and Above) 17. Adjust AlA2R512 ORTHO and the front-panel ALIGN control to optimize the orientation and appearance of the rectangular graticule pattern on the CRT display. 18. Repeat steps 13 through 17 as needed to optimize overall display focus and appearance.
PAGE 209
5. Log Amplifier Adjustments 5. Log Amplifier Adjustments Reference Related Performance Tests Note Description IF-Display Section A4A3 Log Amplifier-Filter A4A2 Log Amplifier-Detector Scale Fidelity Test The A4A3 Log Amplifier-Filter and A4A2 Log Amplifier Detector are temperature compensated as a matched set at the factory. In the event of a circuit failure, a new matched set must be ordered. Contact your nearest HP Service Center.
PAGE 210
5. Log Amplifier Adjustments Procedure 1. Position the spectrum analyzer upright as shown in Figure 3-33. Remove the IF-Display section top cover. 2. Set spectrum analyzer LINE switch to ON and press (2-22). Offset Adjustment Check 3. Key in FREQUENCY (REFERENCE LEVEL_) SPAN] 0 Hz, CCENTER FREQUENCY) 7.6 MHz, + 10 dBm, (jREs) 10 kHz, and press LIN pushbutton. 4. Connect DVM to A4AlTPl and DVM ground to the IF casting. Connect the frequency synthesizer to the RF INPUT.
PAGE 211
5. Log Amplifier Adjustments Bandpass Filter Center Adjustment 6. Press LOG CENTER dB/DIv). 7. Set the frequency synthesizer for 7.6000 MHz at +5.0 dBm outpu t level. 8. Adjust A4A3C55 CTR for maximum DVM indication. See Figure 3-34 for location of adjustment. If A4A3C55 is at an extreme of its adjustment range (fully meshed, maximum capacitance, or unmeshed, minimum capacitance), increase or decrease value of A4A3C52 and A4A3C53. Refer to lhble 3-3 for range of values.
PAGE 212
5. Log Amplifier Adjustments 20. Adjust A4A2R61 ATTEN for DVM indication of + 1.000 fO.OOO1 V dc. See Figure 3-34 for location of adjustment. If unable to adjust A4A2R61 ATTEN for proper indication, increase or decrease value of A4A2R62. (If A4A2R61 is fully clockwise, increase the value of A4A2R62.) Refer to ‘Ihble 3-3 for range of values. 21. Repeat steps 17 through 20, until specifications of steps 18 and 20 are achieved without further adjustment.
PAGE 213
6. Video Processor Adjustments 6. Video Processor Adjustments Reference Related Performance Test Description IF-Display Section A4Al Video Processor Log Scale Switching Uncertainty Test The CAL OUTPUT signal is connected to the RF INPUT through a step attenuator. The instrument is placed in zero frequency span to produce a dc level output from the log amplifier. The A4A2R79 ZERO adjustment, which sets the dc offset of the output buffer amplifier of the log board, is checked and adjusted if necessary.
PAGE 214
6. Video Processor Adjustments 6. Set step attenuator to 120 dB. DVM indication should be 0.0000 f0.0005 V dc. If DVM indication is out of tolerance, adjust A4A2R79 ZERO on A4A2 Log Amplifier-Detector. See Figure 3-34 for the adjustment location. 7. Set the step attenuator to 0 dB. 8. Key in (REFERENCE LEVEL) and adjust DATA knob, and then the front panel AMPTD CAL control, for DVM indication as close to + 1.000 fO.OO1 Vdc as possible. 9. Connect DVM to A4AlTP2. 10.
PAGE 215
6. Video Processor Adjustments 22. Decrease reference level to -70 dBm using the step key. 23. DVM indication should be +0.200 f0.002 V dc greater than the indication recorded in step 19. If not, readjust A4AlR2 LG OS. 24. Decrease reference level to -90 dBm using the step key. 25. DVM indication should be +0.400 ho.004 V dc greater than the indication recorded in step 19. If not, readjust A4AlR2 LG OS. 26. Repeat steps 17 through 25 until no further adjustments are required.
PAGE 216
7. 3 MHz Bandwidth Filter Adjustments Reference Related Performance Test Description IF-Display Section A4A7 3 MHz Bandwidth Filter Resolution Bandwidth Switching Uncertainty Test Resolution Bandwidth Selectivity Test With the CAL OUTPUT signal connected to the RF INPUT, the 18.4 MHz oscillator is adjusted with the FREQ ZERO control (on the front panel) to peak the IF signal for maximum amplitude for the center of the 3 MHz bandpass.
PAGE 217
7. 3 MHz Bandwidth Filter Adjustments Equipment Procedure 1O:l Divider Probe, 10 MW7.5 pF (2 required). ........... HP 10432A Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP3335A Oscilloscope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 54501A Crystal Filter Bypass Network (4 req&-ed) ......... See Figure 3-109 Test Cable: BNC to SMB snap-on . . . . . . . . . . . . . . . . . . . . HP 85680-60093 1.
PAGE 218
7. 3 MHz Bandwidth Filter Adjustments 3 MHz A4A7 Bandwidth Filter A4A7 Figure 3-38. Location of Center, Symmetry, and 10 Hz Amplitude Adjustments 9. Remove crystal filter bypass network near Cl4 SYM. 10. Adjust A4A7C15 CTR for minimum amplitude of the displayed signal peak. Adjust A4A7C14 SYM for best symmetry of the displayed signal. Repeat adjustments to ensure that the signal is nulled and adjusted for best symmetry. See Figure 3-38 for location of adjustments. 11.
PAGE 219
7. 3 MHz Bandwidth Filter Adjustments Filter Peak Adjust Note The adjustment ranges of A4A7C13 PK, A4A7C22 PK, A4A7C31 PK, and A4A7C40 PK are all indirectly affected by factory-select components A4A7C93 and A4A7C5. A4A7C93 and A4A7C5 set the peak frequency for the first 3 MHz filter pole, setting the reference for peaking the amplitudes of the remaining 4 poles.
PAGE 220
7. 3 MHz Bandwidth Filter Adjustments 3 MHz A4A7 Bandwidth Filter Figure 3-39. Location of 3 MHz Peak Adjustments 26. Move the oscilloscope channel 4 probe to A4A7TP3 (left side of C32 SYM). 27. Adjust frequency synthesizer output frequency to peak oscilloscope channel 1 display. the 28. Adjust A4A7C22 PK for maximum peak-to-peak signal on channel 4 display. See Figure 3-39 for location of adjustment. If unable to achieve a “peak” in signal amplitude, increase or decrease value of A4A7C21.
PAGE 221
7. 3 MHz Bandwidth Filter Adjustments 10 Hz Amplitude Adjustments 37. Connect CAL OUTPUT to RF INPUT. Key in (-1, C-1 9, @E--ET) 10 Hz. 38. Adjust the spectrum analyzer front panel FREQ ZERO control for maximum signal amplitude on the CRT display. 39. Key in [RESBW) 1 kHz and DISPLAY LINE C-1. Using the DATA knob, place the display line at the signal trace. 40. Key in (REs] 10 Hz. 41. Adjust the spectrum analyzer front panel FREQ ZERO control for maximum signal amplitude on the CRT display. 42.
PAGE 222
8. 21.4 MHz Bandwidth Filter Adjustments Reference Related Performance Tests Description IF-Display Section A4A4 Bandwidth Filter A4A8 Attenuator-Bandwidth Filter IF Gain Uncertainty Test Resolution Bandwidth Switching Uncertainty test Resolution Bandwidth Selectivity Test First the LC Filters (100 kHz to 3 MHz bandwidths) on the A4A4 Bandwidth Filter are adjusted.
PAGE 223
8. 21.4 MHz Bandwidth Filter Adjustments Equipment Procedure Digital Voltmeter (DVM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A 10 dB Step Attenuator . . . . . . . . . . . . . . . . . . . . . . . HP 355D, Option H89 1 dB Step Attenuator . . . . . . . . . . . . . . . . . HP 3556, Option H25 Crystal Filter Bypass Network (2 required) . . Refer to Figure 3-109 1. Position the spectrum analyzer upright as shown in Figure Figure 3-40 and remove the IF-Display Section cover. 2.
PAGE 224
8. 21.4 MHz Bandwidth Filter Adjustments 11. Key in [RESBW) 100 kHz, C-SPAN) 200 kHz and MARKER (PEAK SEARCH). 12. Adjust A4A4R43 LC to align markers on display. MARKER A level should indicate 1.00 X. See Figure 3-41 for location of adjustment. 13. Repeat steps 10 through 12 until no further adjustment is necessary. A4A4 XTAL 1 4 . Key in MARKER loFF) @TiiT) 30 kHz and [FREQUENCY SPAN) 100 kHz. Adjustments 15.
PAGE 225
8. 21.4 MHz Bandwidth Filter Adjustments for satisfactory signal symmetry, increase or decrease value of A4A4C66. Refer to ‘Iable 3-3 for range of values. 22. All crystal filter bypass networks are removed. Signal should be centered and symmetrical. If not, go back to step 14 and repeat adjustments. 23. Press MARKER 24. Key in [PEAK (FREQUENCY SEARCH) SPAN) and MARKER Ln]. 20 kHz, (RES] 3 kHz, and MARKER [PEAK SEARCH). 25. Adjust A4A4R49 XTAL to align markers on display.
PAGE 226
8. 21.4 MHz Bandwidth Filter Adjustments 32. Adjust A4A8R35 LC to align markers on display. MARKER A level should indicate 1.00 X. See Figure 3-43 for location of adjustment. 33. Repeat steps 30 through 32 until no further adjustment is necessary. A4A8 XTAL Adjustments 34. Key in (RESBW,) 30 kHz, [FREQUENCY SPAN) 100 kHz MARKER m). 35. Press CREFERENCE) and adjust DATA knob to set signal peak approximately 2 divisions down from top CRT graticule line. 36.
PAGE 227
8. 21.4 MHz Bandwidth Filter Adjustments A10 dB and A20 dB Adjustments 43. Connect CAL OUTPUT to RF INPUT through 1 dB and 10 dB step attenuators. Set step attenuators to 25 dB. 44. Key in ( CENTER FREQUENCY_) 100 MHz, ( FREQUENCY SPAN] 3 kHz, (mj 0 dB, [RES’ 1 kH z, (REFERENCE LEVEL) -30 dBm. 45. Key 46. in LOG CENTER dB/blv] 1 dB, MARKER [al Key in (REFERENCE LEVEL] -20 dBm. Set step attenuators to 15 dB. 47. Adjust A4A8R7 AlOdB to align markers on display. MARKER A level should indicate 0.
PAGE 228
8. 21.4 MHz Bandwidth Filter Adjustments 57. Adjust A4A4C41 LC DIP for minimum amplitude of signal peak. See Figure 3-41 for location of adjustment. Key in MARKER (PEAK SEARCH), MARKER a], and then press MARKER (PEAK SEARCH) and re-adjust LC DIP to offset the signal peak approximately -17 kHz (to the left). This is done to compensate for operating the A4A4 Bandwidth Filter on extender boards. If unable to achieve a “dip” in signal amplitude, increase or decrease value of A4A4R16.
PAGE 229
9. 3 dB Bandwidth Adjustments 9. 3 dB Bandwidth Adjustments Reference Related Performance Test Description Equipment Procedure (For instruments with Option 462, refer to Chapter 4.) IF-Display Section A4A9 IF Control Resolution Bandwidth Accuracy Test The spectrum analyzer CAL OUTPUT signal is connected to the RF INPUT. Each of the adjustable resolution bandwidths is selected and adjusted for the proper 3-dB bandwidth. No test equipment is required for this adjustment. 1.
PAGE 230
9. 3 dB Bandwidth Adjustments A4A9 IF CONTROL A4A9 Figure 3-45. Location of 3 dB Bandwidth Adjustments 9. On the spectrum analyzer, key in [FREQUENCY SPAN) 3 MHz, MARKER (OFF), (PEAK SEARCHJ, MARKER Ia], and press @J several times to position the second marker at the leftmost graticule line. 10. Readjust A4A9R60 3 MHz for a MARKER A indication of -3.00 dB 410.05 dB. 11. Repeat steps 8 through 10 as necessary until no further adjustment is required. 12.
PAGE 231
9. 3 dB Bandwidth Adjustments 20. On the spectrum analyzer, key in the following settings: ( CENTER FR E QUENCY ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 MHz FREQUENCY SPAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300 kHz ;&VT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300 kHz 21.
PAGE 232
9. 3 dB Bandwidth Adjustments 31. Adjust A4A9R65 10 kHz for a MARKER A indication of -3.00 dB &0.05 dB. 32. On the spectrum analyzer, press QfJ several times to position the second marker at the rightmost graticule line. Then, press [sTopI and use the DATA knob to adjust the centering of the displayed signal for a MARKER A indication of -3.00 dB f0.05 dB. 33.
PAGE 233
9. 3 dB Bandwidth Adjustments A4A7R100, A4A7R102, and A4A7R104. If it is necessary to increase one of these 3-dB bandwidths, increase the value of one or more of these factory-select components.
PAGE 234
10. Step Gain and 18.4 MHz Local Oscillator Adjustments Reference Related Performance Tests Description IF-Display Section A4A7 3 MHz Bandwidth Filter A4A5 Step Gain Resolution Bandwidth Selectivity Test IF Gain Uncertainty Test Center Frequency Readout Accuracy Test First, the IF signal from the RF Section is measured with a power meter and adjusted for proper level.
PAGE 235
10. Step Gain and 18.4 MHz Local Oscillator Adjustments Equipment Digital Voltmeter (DVM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3456A Power Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..HP436 A Power Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8481A 10 dB Step Attenuator . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 236
10. Step Gain and 18.4 MHz Local Oscillator Adjustments 14. Note MARKER amplitude in mV and adjust A4A5R33 CAL to 70.7 mV (top CRT graticule line). See Figure 3-47 for location of adjustment. A4A8Jl A4A7 3 MHz BANDWIDTH F I LTER A4A5 STEP GAIN R33 CAL A4A.5 Figure 3-47. Location of IF Gain Adjustment 15.
PAGE 237
10. Step Gain and 18.4 MHz Local Oscillator Adjustments A4A5 S T E P G A I N R32 SGlO R44 SGZO-1 R54 SGZO-2 R 7 0 R 6 2 A4A5 Figure 3-48. Location of 10 dB Gain Step Adjustments 22. If A4A5R32 SGlO adjustment does not have sufficient range to perform adjustment in step 19, increase or decrease the value of A4A7R60 as necessary to achieve the proper adjustment range of A4A5 SGlO. See Figure 3-39 for the location of A4A7R60. Refer to ‘Ihble 3-3 for range of values for A4A7R60.
PAGE 238
10. Step Gain and 18.4 MHz Local Oscillator Adjustments 0.1 dB Gain Step Adjustment 34. Key in LIN, ISHIFT) * [AUTO) (resolution bandwidth), and (REFERENCE LEVEL] -19.9 dBm. Set step attenuators to 13 dB. Press MARKER [nl twice to establish a new reference. 35. Key in dB. (REFERENCE LEVEL] -18.0 dBm. Set step attenuators to 11 36. Adjust A4A5R51 VR for MKR A level of +O.lO dB. See Figure 3-49 for location of adjustment. 37. Remove all test equipment from the spectrum analyzer.
PAGE 239
10. Step Gain and 18.4 MHz Local Oscillator Adjustments Note Factory-select component A4A7R60 affects the adjustment of A4A6AlR29 WIDE GAIN. If the value of A4A7R60 is changed, perform Adjustment Procedure 11, “Down/Up Converter Adjustments”.
PAGE 240
11. Down/Up Converter Adjustments Reference Related Performance Test Description IF-Display Section A4A6 Down/Up Converter Resolution Bandwidth Switching Uncertainty Test The CAL OUTPUT signal is connected to the RF INPUT connector of the spectrum analyzer and controls are set to display the signal in a narrow bandwidth. A marker is placed at the peak of the signal to measure the peak amplitude.
PAGE 241
11. Down/Up Converter Adjustments Note The adjustment of A4A6AlR29 WIDE GAIN is affected by factory-select component A4A7R60, which sets the overall gain of the A4A7 3 MHz Bandwidth Filter Assembly. If the A4A7 3 MHz Bandwidth Filter Assembly or the A4A5 Step Gain Assembly is repaired or replaced, perform Adjustment Procedure 10, “Step Gain and 18.4 MHz Local Oscillator Adjustments” to select (if necessary) A4A7R60 before adjusting A4A6AlR29 WIDE GAIN (steps 14-17). 1.
PAGE 242
11. Down/Up Converter Adjustments ~CENTER 10 kHz, FREQUENCY) 21.4 MHz, CFREQUENCY LEVEL) -30 dBm. SPAN] 50 kHz, fj’j] [REFERENCE 9. Connect the tip of the active probe to A4A6A2TP4. On the second spectrum analyzer, press CREFERENCE LEVEL] and use the DATA knob to position the peak of the displayed 2 1.4 MHz signal near the top CRT graticule line. 10. On the second spectrum analyzer, key in (jj’ 2 dB, MARKER (PEAK SEARCH] and record the level of the displayed 21.
PAGE 243
11. Down/Up Converter Adjustments 23. Connect the tip of the active probe to A4A4TP7, and adjust A4A6AlC31 18.4 MHz NULL for minimum amplitudes of the displayed 18.4 MHz and 36.8 MHz signals on the second spectrum analyzer. The level of the displayed 18.4 MHz signal should be below -10 dBm. If A4A6AlC31 has insufficient adjustment range, increase the value of factory-select resistor A4A5RlO. See Figure 3-49 for the location of A4A5RlO.
PAGE 244
12. 10 MHz Standard Adjustment (SN 2637A and Below) Reference Description Equipment RF-Section: A22 10 MHz Frequency Standard A22A2 Frequency Standard Regulator The frequency of the internal 10 MHz Frequency Standard is compared to a known frequency standard and adjusted for minimum frequency error.
PAGE 245
12. 10 MHz Standard Adjustment (SN 2637A and Below) message should typically appear on the spectrum analyzer display for 10 minutes or less after line power is first applied to the RF Section. Note The rear-panel FREQ REFERENCE switch enables or disables the RF Section +20 Vdc switched supply, which powers the oscillator circuits in the A22 10 MHz Frequency Standard.
PAGE 246
12. 10 MHz Standard Adjustment (SN 2637A and Below) Frequency Counter should now display the difference between the frequency of the INPUT A signal (A22 10 MHz Frequency Standard) and 10.0 MHz with a displayed resolution of 1 mHz (0.001 Hz). 7. Wait at least two gate periods for the Frequency Counter to settle, and record the frequency of the A22 10 MHz Frequency Standard as reading #l . Reading # 1: mHz 8.
PAGE 247
12. 10 MEtz Standard Adjustment (SN 2637A and Below) 14. Remove the two adjustment cover screws from the A22 10 MHz Frequency Standard. Refer to Figure 3-53 for the location of the A22 10 MHz Frequency Standard. Note Do not use a metal adjustment tool to tune an oven-controlled crystal oscillator (OCXO). The metal will conduct heat away from the oscillator circuit, shifting the operating conditions. m A22 10 MHz /Standard TOP VIEW Figure 3-53. Location of 10 MHz Standard Adjustments 15.
PAGE 248
12. 10 MHz Standard Adjustment (SN 2728A and Above) Reference Description Equipment RF-Section: A22 10 MHz Frequency Standard A22Al Frequency Standard Regulator A22A2 10 MHz Quartz Crystal Oscillator The frequency of the internal 10 MHz Frequency Standard is compared to a known frequency standard and adjusted for minimum frequency error.
PAGE 249
12. 10 MHz Standard Adjustment (SN 2728A and Above) Replacement oscillators are factory-adjusted after a complete warmup and after the specified aging rate has been achieved. Readjustment should typically not be necessary after oscillator replacement, and is generally not recommended. 1. Set the rear-panel FREQ REFERENCE switch on the spectrum analyzer RF Section to INT.
PAGE 250
12. 10 MHz Standard Adjustment (SN 2728A and Above) 4. Disconnect the short jumper cable on the RF Section rear panel from the FREQ REFERENCE INT connector. Connect this output (FREQ REFERENCE INT) to INPUT A on the Frequency Counter. A REF UNLOCK message should appear on the CRT display. 5. Set the Frequency Counter controls as follows FUNCTION/DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FREQ A INPUT A: x10 A’ITN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 251
12. 10 MHz Standard Adjustment (SN 2728A and Above) 10. If the difference between reading #2 and reading #l is greater than 1 mHz, the A22 10 MHz Frequency Standard has not achieved its specified aging rate; the spectrum analyzer should remain powered (not in STANDBY) and undisturbed for an additional 24-hour interval.
PAGE 252
12. 10 MHZ Standard Adjustment (SN 2728A and Above) L. TOP VIEW Figure 3-55. Location of 10 MHz Standard Adjustments 15. On the Frequency Counter, select a 10 second gate time by pressing (GATE-1 10 C-1. The Frequency Counter should now display the difference between the frequency of the INPUT A signal and 10.0 MHz with a resolution of 0.001 Hz (1 mHz). 16.
PAGE 253
13. Sweep, DAC, and Main Coil Driver Adjustments 13. Sweep, DAC, and Main Coil Driver Adjustments Reference RF-Section: Al6 Scan Generator A19 Digital-to-Analog Converter (DAC) A20 Main Coil Driver Related Performance Tests Center Frequency Readout Accuracy Test Frequency Span Accuracy Test Sweep Time Accuracy Test Description Note Equipment The Sweep Time is adjusted first by viewing the Scan Ramp on an oscilloscope and adjusting for proper levels.
PAGE 254
13. Sweep, DAC, and Main Coil Driver Adjustments Procedure 1. Position the spectrum analyzer on its right side as shown in Figure 3-56, with bottom cover removed. Remove RF Digital Section cover over the Al2 through Al6 assemblies. Jumper A12TP2 to A12TP3 (Lock Indicator Disable). SYNTHESIZED SWEEPER :R GA18 SPECTRW ANALTZER Figure 3-56. Sweep and DAC Adjustments Setup 2. Set the spectrum analyzer LINE 3. Key in @iZTEiZGHz_), [SWEEP TIME] switch to ON. 500 ms. 4.
PAGE 255
13. Sweep, DAC, and Main Coil Driver Adjustments Press [j) connect dots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..on Press ($K%ij hp s t o p p e d 2 . 0 0 V/div 1 offset: 3 . 5 0 0 v : I dc 10.00 - 2 5 0 . 0 0 0 IS 2 5 0 . 0 0 0 IIS 5 0 . 0 as/div 2 f 1.375 v Figure 3-57. OV to + 1OV Sweep Ramp at A16TP3 Sweep Time Adjustment (Preferred Procedure) 6. Connect universal counter INPUT A to the spectrum analyzer rear panel PENLIFT RECORDER OUTPUT.
PAGE 256
13. Sweep, DAC, and Main Coil Driver Adjustments A19 DAC Al6 SCAN GENERATOR A19 TOP VIEW Al6 (85660-60212) (85660-60247) Figure 3-58. Location of Sweep and DAC Adjustments Sweep Time Adjustment (Alternate Procedure) Aux Out Adjustment 10. Adjust A16R67 SWEEP TIME adjustment for sweep ramp of 500 ms duration (not including dead time at beginning and end of each ramp) as measured on the oscilloscope. 11. Press (2-22). 12. Connect the oscilloscope channel 1 to A16TP4 (AUX OUT).
PAGE 257
13. Sweep, DAC, and Main Coil Driver Adjustments h, s t o p p e d 2 . 0 0 V/div 1 offset: 3 . 5 0 0 v 10.00 : I dc ..-...........; ..-... i -... _ . . . . . . . ..i .._...... ~..I..&_-i ..__............. / ..__. i .__.._........_; ._...... LB+ i 1 / ; ; j ; i / i / ./. i ; ; : g i / 1 .i. i i . + _.... + _......._....... /: .._.......... + ._._......,.__; .._..... _ k $-.--~. T ] : ; / i 1 1;: / 1 I I f / i ./ i i .._...._.... i .,,. i I ...._._._.I..._ i .._. I . . . . . . _ . . _ . . _ . . . _ i .._.....
PAGE 258
13. Sweep, DAC, and Main Coil Driver Adjustments Offset and YTO DAC Adjustments 15. Perform this step only if the Al6 Scan Generator is P/N 85660-60134 or 85660-60034. (HP 85660AB with serial number prefix 2235A or below.) a. Connect DVM to A16TP3 and DVM ground to A16TPl GND. b. Key in (jZZi%J SWEEP (SINGLE), (SHIFT) (RES)r (forces spectrum analyzer to reset Scan Ramp to 0 Vdc after each single sweep). C. Press SWEEP (ZiYZXQ. d.
PAGE 259
13. Sweep, DAC, and Main Coil Driver Adjustments 17. Perform this step only if the A19 Digital-to-Analog Converter is P/N 85660-60164 or 85660-60038. (HP 85660A/B with serial number prefix 2407A or below.) a. Connect DVM to A19TP2 and DVM ground to A19 GND. b. Key in C-1, [SHIFT) [ml), SWEEP C-J, LSHIFT) @EiGT~, @TART FREQ) 2.5 GHz, LsTopFREQ) 4.9 GHz, (SAVE_) 1, @KFEij-- 2.51 GHz, (SAVE) 2, [sTop) 22 GHz, m 3, [FREQUENCY SPAN) 0 HZ, &ENTER FREQUENCY) 2.0 GHZ, (SAVE_) 4, ( CENTER FREQUENCY ] 6.
PAGE 260
13. Sweep, DAC, and Main Coil Driver Adjustments C. Key in @Z?XiYj 1 (to set YTO Pretune DAC to 0). d. Adjust A19R50 for DVM indication of + 10.0000 f0.0005 Vdc. e. Connect DVM to A19TP2 (DVM ground to A19TP3). f. Key in [RECALL] 2 (to set YT.0 Pretune DAC to 4095). 8. After sweep has completed, adjust A19R9 for stable DVM indication of -18.6000 f0.0005 Vdc. h. Key in [RECALL_) 3 (to set YTO Pretune DAC to 293). i.
PAGE 261
13. Sweep, DAC, and Main Coil Driver Adjustments 22. Key in (2--22), [SHIFT) I-]), SWEEP C-J, m @i%EiF~, CFREQUENCY SPAN) 0 Hz, (CENTER FREQUENCY) 2.3 GHz, ISAVE_) 1, [CENTER FREQUENCY) 6.15 GHz, IsAvE_) 2. 23. Key in Cm] 1. 24. Adjust A20R34 2.3 GHz adjustment for frequency counter indication of 2300.0 fO.l MHz, allowing time for frequency counter display to settle. Refer to Figure 3-62 for location of adjustments. A20 MAIN COIL DRIVER A l l J l 0 DET OUT 0 DET 2.; I A20 Figure 3-62.
PAGE 262
13. Sweep, DAC, and Main Coil Driver Adjustments SPECTRLU ANALYZER Figure 3-63. YTO Main Coil Driver Adjustments Setup (Alternate Piocedure) 31. Key in @Z?iTKJ, CCENTER FREQUENCY) 0 Hz (Frequency Span readout should indicate 2 GHz). 32. Adjust A20R25 6.15 GHz adjustment to obtain two comb teeth (f100 MHz harmonics of CAL OUTPUT signal) per division on display.
PAGE 263
13. Sweep, DAC, and Main Coil Driver Adjustments 42. Adjust A20R25 6.15 GHz to align nearest comb tooth with center CRT graticule line. 43. Key in (RECALL) 4. 44. Adjust A20R34 2.3 GHz to align nearest comb tooth with center CRT graticule line. 45. Repeat steps 41 through 44 until no further adjustments are necessary. 46. Reconnect cable 8 (grey) to AllJl O/ DET OUT. Remove jumpers from between A12TP2 and A12TP3 and between A20TP5 GND and A21TP2. Connect the oscilloscope channel 1 to A21TP2. 47.
PAGE 264
13. Sweep, DAC, and Main Coil Driver Adjustments 59. Alternately press [PEAK SEARCH) and adjust A16R71 GAIN 2 for marker frequency of 4.000 GHz as indicated by display annotation. Band Overlap 6 0 . Key in (2--22GHz), (SHIFT), (sTopFREQI) 7.1 GHz. Adjustments [PRESEL PEAK)=, (START FREQ) 4.5 GHz, 61. Adjust A19R43 25 GHz SPAN and A19R32 2.5 GHz SPAN fully counterclockwise. 62. For HP 8566A, set synthesized sweeper for output of 5.820 GHz at 0 dBm.
PAGE 265
13. Sweep, DAC, and Main Coil Driver Adjustments 73. Use signal generator TUNING control to vary signal generator output frequency flO0 MHz (from frequency in step 70) in 1 MHz steps. Readjust A19R43 25 GHz SPAN slightly as necessary so that amplitude of displayed signal peak varies less than 3 dB over entire flO0 MHz range bracketing band overlap point. 74. Key in (SHIFT), [PRESEL PEAK)=. 75. Verify that jumper between A12TP2 and A12TP3 (Lock Indicator Disable) has been removed.
PAGE 266
14. 100 MHz Adjustments VCXO Reference RF-Section: A7A2 100 MHz VCXO Related Performance Tests Noise Sidebands Test Residual Responses Test Description The open loop frequency and maximum power output of the 100 MHz VCXO is centered around 100 MHz. The 400 MHz signal is adjusted for maximum 400 MHz output with minimum spurious output. The 400 MHz output is set to -10 dBm by selecting proper resistor values for the attenuator network A7A2R67, R68, and R69. Equipment Frequency Counter . . . . . . . .
PAGE 267
14. 100 MFIz VCXO Adjustments short BNC jumper cable W15 is connected between 52 FREQ REFERENCE EXT and 53 FREQ REFERENCE INT. 3. Set the dc power supply for an output of -8 Vdc. Connect the -8 Vdc output of the dc power supply to the A7A2TPl TUNE test point. Refer to Figure 3-65 for the location of the A7A2 100 MHz VCXO Assembly and test point A7A2TPl TUNE. A7A2 100 MHZ vcxo (Adlustment l o c a t i o n s lobled 9” c o v e r ) TOP VIEW A7A2 Figure 3-65. Location of 100 MHz VCXO Adjustments 4.
PAGE 268
14. 100 MHz VCXO Adjustments CENTER iD8.000 00 MHZ RES BW 1 kHZ “BW 3 ktiZ \ I SPAN 3.00 kHZ SWP 3Em msec Figure 3-66. Typical Tuning Range of A7A2 100 MHz VCXO Note If the output power of the 100 MHz VCXO drops off by more than 1 dB within f300 Hz of 100 MHz, select a new value for factoryselect component A7A2L4.
PAGE 269
14. 100 MHz VCXO Adjustments TRACE A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CLEAR-WRITE TRACE B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BLANK 8. Adjust A7A2C4 100 MHz slowly through its full range while monitoring the display of the second spectrum analyzer. The output of the 100 MHz VCXO should be a single output signal near 100 MHz, with no spurious oscillations at other frequencies.
PAGE 270
14. 100 MHz VCXO Adjustments output signal. Verify that the 100 MHz harmonics do not exceed the levels listed in ‘Iable 3-8 ‘Ihble 3-8. Limits for 100 MHz Harmonics 20. Set the controls of the second spectrum analyzer as follows: CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .400 MHz FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 kHz REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -7 dBm RES BW . .
PAGE 271
14. 100 MHz VCXO Adjustments ‘able 3-10. Resistor Values Resistor FIP Fart Number 6.8 12.1 17.8 23.7 31.6 38.3 46.4 51.1 61.9 110 121 133 147 178 215 261 422 825 0683-0685 0757-0379 0757-0294 0698-343 1 0757-0180 0698-3435 0698-4037 0757-0394 0757-0276 0757-0402 0757-0403 0698-3437 0698-3438 0698-3439 0698-3441 0698-3132 0698-3447 0757-042 1 22. Set the controls of the second spectrum analyzer as follows: CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 272
15. M/N Loop Adjustments Reference Description Equipment RF-Section: A7A4 M/N Output The M/N VCO tuning range end points and output level are set and checked to ensure an adequate RF output level across the tuning range of the M/N phase-lock loop. Frequency Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 5343A Spectrum Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8566B Digital Voltmeter (DVM) . . . . . . . . . .
PAGE 273
15. M/N Loop Adjustments A7A4 M/N OUTPUT AlZTPZ/A12TP3 LOCK INDICATOR DISABLE AlAlCl FREO ADJ TPl TUNE AlAlC5 POWER A2J3 I AlA2Wl A7A4 Figure 3-68. Location of PLL Adjustments 4. Disconnect the cable 93 (white/orange) from A7A4J2 M/N OUT in the RF Section. Refer to Figure 3-68 for the location of the A7A4 M/N Output Assembly. 5. Connect the frequency counter BNC input to A7A4J2 M/N OUT using a BNC to SMB Snap-on Test Cable.
PAGE 274
15. M/N Loop Adjustments 14. Adjust the AMPTD CAL control on the second spectrum analyzer for a -10.00 dBm displayed signal, and then press (SHIFT) (FREQUENCY SPAN]~. 15. Set the controls of the second spectrum analyzer as follows: CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .375 MHz FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 MHz REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5 dBm LOG SCALE . .
PAGE 275
16. YTO Loop Adjustments 16. YTO Loop Adjustments Reference Related Performance Tests RF-Section: Al lA5 Sampler AllA YTO Loop Interconnect Average Noise Level Test Description The output power level of the AllAl Coupler/Isolator/Amplifier (CIA) is checked over the 2.2 GHz to 6.2 GHz tuning range of the All YTO Loop, and the Al lA3 YTO is tuned to the minimum power frequency. Then, the CIA GATE BIAS is adjusted for a -5.0 dBm output power level at the coupled output of the AllAl CIA.
PAGE 276
16. YTO Loop Adjustments I SPECTRW ANALYZER Figure 3-69. YTO Loop Adjustment Setup AZlTP2 AllJl AllJ2 AllAl AllJ3 Wll A12TP2 A12TP3 AllJ5 AllJ4 AT2,'A6W6 e . . e . -a-, Figure 3-70. Location of Assemblies, Cables, and Test Points 3. On the All YTO Loop Assembly, disconnect the cable 8 (gray) from AllJl PHASE DET OUT, the cable 93 (white/orange) from AllJ2 M/N IN, and the cable 5 (green) from AllJ3 20/30 IN. Disconnect cable 0 (black) from AllJ4 IF IN and AllJ5 IF OUT. See Figure 3-70. 4.
PAGE 277
16. YTO Loop Adjustments mounting hole located on the chassis divider next, to the AlOAl PLLl VCO Assembly. Figure 3-71. All YTO Loop Service Position 6. Remove the SMA 50 ohm termination from the RF Section frontpanel 1ST LO OUTPUT connector. Install the termination on the YTO OUT connector of Al 1Al CIA Assembly. CIA Gate Bias Adjustment Note Al lA7 6.
PAGE 278
16. YTO Loop Adjustments REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +5 dBm LOG SCALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 dB/DIV 13. Set the Spectrum Analyzer (DUT) LINE switch to ON, and key in @REQUENCY SPAN] 0 Hz, (CENTER FREQUENCY] 5.6786 GHz. This tunes the Al lA3 YTO to approximately 6.00 GHz. 14.
PAGE 279
16. YTO Loop Adjustments ST‘\RT 2 Figure 3-72. Typical YTO Loop Swept Frequency Response at AllAl 21. On the second spectrum analyzer, key in [PEAK SEARCH) to position a marker on the peak of the TRACE A displayed signal. Press [PRESEL PEAK] on the second spectrum analyzer and wait for the preselector peaking routine to complete. 22. On the Spectrum Analyzer (DUT), key in (j-14 and wait for the sweep to complete (200 seconds) and the SWEEP LED to turn Off. 23.
PAGE 280
16. YTO Loop Adjustments Frequency determined in step 25, and set the power meter CAL FACTOR control accordingly. Connect the power sensor to the SMA female end of W 11 (W 11 should still be connected to the COUPLED OUT connector of AllAl CIA Assembly). 28. Adjust AllA2R2 GATE BIAS ADJ for a power meter indication of -5.0 dBm fO.l dB. 29. Disconnect the power sensor from semi-rigid coax cable Wll.
PAGE 281
16. YTO Loop Adjustments 32. Set the oscilloscope controls as follows: Press (CHAN_): Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .on amplitude scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200 mV/div offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..-3OO.OOOmV coupling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
PAGE 282
16. YTO Loop Adjustments hp running j . .._..........^_.._..._.....................................~.......~................. ~__ .+.+ _.._.........._.....~-~-.~..............................................-..............! .i I ,......,...,..,.,,, .,,.,.. ..---...-..-..............--.....-.-..... i .._. - _............._...__...- - . 1 0 . 0 0 0 0 IIS 0 . 0 0 0 0 0 s 2 . 0 0 rs/div VrarkerPC 1 ) 275.000mV VmarkerlC 1 I -712.500nV delta V( 1 I 9a7.500nv ;l 2 0 0 mV/div ~offset~-300.0 liv ..-......
PAGE 283
16. YTO Loop Adjustments MHz All YTO Loop Frequency: 41. On the synthesized sweeper, press Icw) and key in the M/N Loop Frequency from step 40. 42. Press @Z?ZiZ) on the second spectrum analyzer. Connect the CAL OUTPUT signal on the second spectrum analyzer to the RF INPUT on the second spectrum analyzer, and press Cm] 8. 43. Adjust the AMPTD CAL control on the second spectrum analyzer for a -10.00 dBm displayed signal.
PAGE 284
16. YTO Loop Adjustments 48. On the second spectrum analyzer, key in (ENTER dB/DIv) 2 dB, (j-1 3 MHz, MARKER (jNORMALj, (PEAK SEARCH] to position a marker on the peak of the displayed 30 MHz fundamental signal. Adjust AllA5Rl IF GAIN for an IF OUT power level (the 30 MHz fundamental signal) of +4.0 dBm. Note If AllA5Rl IF GAIN does not have sufficient adjustment range, change the value of factory-select component AllA5LlO.
PAGE 285
16. YTO Loop Adjustments Note If the power level of the displayed fundamental below 20 MHz is too low, decrease the value of factory-select component AllA5C22. If the power level of the displayed fundamental between 20 MHz and 30 MHz is too low, decrease the value of factory-select component AllA5R22. If the power level of the displayed fundamental above 30 MHz is too high, increase the value of factory-select component AllA5LlO.
PAGE 286
17. 20/30 Loop Phase Lock Adjustments Reference Description RF-Section: A10 20/30 Synthesizer AlOAl PLLl VCO AlOA3 PLLl IF AlOA4 PLL3 Up Converter AlOA5 PLL2 VCO A 1 OA8 PLL2 Discriminator Phase Lock Loop 1 (PLU): On the AlOAl PLLl VCO Assembly, the Loop Amplifier 40 kHz LPF is first adjusted for >65 dB rejection of the 50 kHz subharmonics from fractional-n division.
PAGE 287
17. 20/30 Loop Phase Lock Adjustments Equipment Spectrum Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 8566B High-frequency Active Probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 41800A Probe Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 1122A Frequency Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 5343A Frequency Synthesizer . . . . . . . . .
PAGE 288
17. 20/30 Loop Phase Lock Adjustments 3. Set the frequency synthesizer for a 20 kHz, 0 dBm output. Connect the frequency synthesizer 50-ohm OUTPUT to AlOAlTP3 using a BNC to Alligator clip adapter. Connect the ground lead of the adapter to the metal cover of the AlOAl PLLl VCO Assembly. 4. Connect the high-frequency active probe to the RF INPUT of the second spectrum analyzer and to the probe power supply, as shown in Figure 3-77. 5. Press @ZZZJ on the second spectrum analyzer.
PAGE 289
17. 20/30 Loop Phase Lock Adjustments Ll3 170MHz NULL AlOAl PLLl v c o \ L12 160MHz NULL AlOA3 PLLl I F Lll 165MHz NULL n/ C26* Al OA3 TP3 P l a c e A c t ive Probe here L 7 5OkHz NULL TOP VIEW AlOAT LN8UL5LOkHZ Figure 3-78. Location of PLLl Adjustments 12. On the second spectrum analyzer, press [CENTER FREQUENCY) 100 MHz [FREQUENCY SPAN) 6 MHz MARKER [PEAK SEARCH) to place the second marker on the displayed 50 kHz signal.
PAGE 290
17. 20/30 Loop Phase Lock Adjustments 20. Press CmGHz_ on the second spectrum analyzer. Set the controls of the second spectrum analyzer as follows: CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300 MHz FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .500 MHz REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3 dBm 21. Set the dc power supply for an output of + 16.0 f 0.1 Vdc.
PAGE 291
17. 20130 Loop Phase Lock Adjustments 29. Set the controls of the second spectrum anaiyzer as follows: CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . 165 MHz FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 MHz RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 kHz REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -7 dBm LOG SCALE . . . . . . . . . . . . . . . . . . . .
PAGE 292
17. 20/30 Loop Phase Lock Adjustments 42. On the second spectrum analyzer, press (CENTER FREQUENCY) 140 MHz MARKER (PEAK SEARCH] to position a marker on the peak of the displayed 140 MHz signal, and verify that the output power level of the PLLl IF is at least -14 dBm. If it is not, slightly readjust AlOA3Lll 165 MHz NULL to increase the amplitude of the 140 MHz signal displayed on the second spectrum analyzer to -14 dBm. Refer to Figure 3-78 for the location of AlOA3Lll 165 MHz NULL adjustment. 43.
PAGE 293
17. 20/30 Loop Phase Lock Adjustments Phase Lock Loop 2 wJ4 Note If PLL2 is phaselocked, proceed to step 12. If PLL2 will not phaselock (PL2 UNLOCK indicated on CRT), start with step 1. 1. Set the RF Section LINE switch to STANDBY. Remove AlOA6 PLL2 Phase Detector Assembly from its connector on the A23 Motherboard Assembly. It is not necessary to completely remove the AlOA6 PLL2 0 Detector Assembly from the RF Section. 2. Set the RF Section LINE switch to ON and press @ZZQ 3.
PAGE 294
17. 20/30 Loop Phase Lock Adjustments AlOA5 P L L 2 V C O AlOA8 PLLZ DISCRIMINATOR \ AlOA8 R2 150MHz R 4 1OOMHz I TOP VIEW AlOA5 Figure 3-79. Location of PLL2 Adjustments 6. Adjust AlOA5R2 150 MHz adjustment for a DVM indication of +3.0 f 0.5 Vdc. Refer to Figure 3-79 for the location of AlOA5R2 150 MHz adjustment. 7. Adjust AlOA8R9 .3 MHz adjustment for a frequency counter indication of 0.300 MHz f 0.001 MHz. Refer to Figure 3-79 for the location of AlOA8R9 .3 MHz adjustment. 8.
PAGE 295
17. 20/30 Loop Phase Lock Adjustments 11. Set the RF Section LINE switch to STANDBY. Disconnect the frequency counter from AlOA5J4 SCAN I.1 MHz OUT. Reinstall AlOA6 PLL2 Phase Detector Assembly in the RF Section and reconnect the cable 7 (violet) to AlOA5J4 SCAN I.1 MHz OUT. 12. Set the RF Section LINE switch to ON, and key in (jZZ@, (STOP) 10 MHz, (START FREQ) 8.600 MHz, SWEEP @KKK), TRACE A (CLEAR-WRITE). 13. Connect the DVM to AlOA8TP5 VCO TUNE. 14.
PAGE 296
17. 20/30 Loop Phase Lock Adjustments Phase Lock Loop 3 (P=9 1. Set the RF Section LINE switch to STANDBY. Remove AlOA4 PLL3 Up Converter Assembly from the RF Section, and install it on an extender board. Reconnect the cable 7 (violet) to AlOA5J4 SCAN I.1 MHz OUT and the cable 8 (gray) to AlOA4J3 IN 100 MHz. 2. Connect the RF INPUT of the second spectrum analyzer to SMB test connector AlOA4J4. Refer to Figure 3-80 for the location of test connector AlOA4J4.
PAGE 297
17. 20130 Loop Phase Lock Adjustments Note .Adjustments AlOA4L16 160 MHz PEAK and AlOA4L17 160 MHz PEAK are sealed at the factory and normally do not require readjustment unless a component failure has occurred. lb verify their proper adjustment, skip to step 7. 6. Adjust AlOA4L16 160 MHz PEAK and AlOA4L17 160 MHz PEAK to maximize the amplitude of the 160 MHz signal displayed on the second spectrum analyzer.
PAGE 298
17. 20/30 Loop Phase Lock Adjustments 12. Set the controls of the second spectrum analyzer as follows: CENTER FREQUENCY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166 MHz FREQUENCY SPAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50 MHz REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -14 dBm MARKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 299
17. 20/30 Loop Phase Lock Adjustments 19. Set the RF Section LINE switch to STANDBY. Disconnect the DVM from AlOA4TP3 and the second spectrum analyzer from AlOA4J2 OUT 160-166 MHz. 20. Reinstall AlOA4 PLL3 Up Converter Assembly in the RF Section. Reconnect the cable 7 (violet) to AlOA5J4 SCAN 5.1 MHz OUT, the cable 6 (blue) to AlOA4J2 OUT 160-166 MHz, and the cable 8 (gray) to AlOA4J3 IN 100 MHz.
PAGE 300
18. RF Module Phase Lock Adjustments Reference Description Equipment RF-Section: A6A9 Phase Lock The 3.3 GHz Heterodyne Phase Lock Loop sampler circuits and 300 MHz Tripler circuits on the A6A9 Phase Lock Assembly are adjusted and checked for proper operation. The match between the Sampler Driver circuit and the A6A9Ul Sampler is adjusted. Then, the output balance of the A6A9Ul Sampler is set.
PAGE 301
18. RF Module Phase Lock Adjustments SPECTRUU ANALYZER DIGITIZING SPECTRM ANALYZER Figure 3-81. RF Module Phase Lock Adjustments Setup A6 A5%&3kI E S u A6A9 PHASE COCK A6A9 TOP VIEW R 2 7 = 1 0 . 0 kQ ( 8 5 6 6 0 A ) 56.2kQ (856608) Figure 3-82. Location of RF Module Phase Lock Adjustments 3.
PAGE 302
18. RF Module Phase Lock Adjustments 6. Connect the DVM to A6A9AlE5, and connect the DVM ground to the metal case/shield of the A6A9 Phase Lock Assembly. Refer to Figure 3-82 for the location of A6A9AlE5 and A6A9AlE6. 7. Note the DVM indication at A6A9AlE5. Voltage at A6A9AlE5: Vdc 8. Connect the DVM to A6A9AlE6, and note the DVM indication. Voltage at A6A9AlE6: Vdc 9. Add the voltage measured in step 7 to the voltage measured in step 8. The absolute value of the resulting sum should be less than 0.
PAGE 303
18. RF’ Module Phase Lock Adjustments 12. Disconnect cable 85 (gray/green) from A6A9J3 100 MHz INPUT, cable 4 (yellow) from A6A9J4 VCO TUNE, and cable 5 (green) from A6A9J5 3.3 GHz INPUT. Remove the A6A9 Phase Lock Assembly from the extender board in the RF Section, and replace the A6A9 Phase Lock Assembly front cover. 100 MHz Tripler Adjustments 13. Install the A6A9 Phase Lock Assembly in the RF Section on an extender board.
PAGE 304
18. RF Module Phase Lock Adjustments Sampler Output Balance Adjustment 2 1. Use a BNC to SMB snap-on test cable to connect the oscilloscope Channel 1 input to the RF Section A6A9J4 VCO TUNE connector. 22. On the oscilloscope, key in (j%ZiLQ [?KK) to perform a soft reset. 23. Set the oscilloscope controls as follows: Press m): Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on amplitude scale . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 305
18. RF’ Module Phase Lock Adjustments 25. Adjust A6A9AlR38 BALANCE for a dead time between consecutive voltage ramps of 3.5 f 0.1 msec. Each voltage ramp should have a “flattened” top and reach a maximum voltage of approximately +3.7 Vdc. The minimum voltage between consecutive voltage ramps should be approximately -24.4 Vdc. 26. Set the spectrum ananlyzer LINE switch to STANDBY. Disconnect the oscilloscope from the RF Section A6A9J4 VCO TUNE.
PAGE 306
19. CAL Output Adjustment Reference , RF-Section: A6A9 Phase Lock Related Performance Test: Calibrator Amplitude Accuracy Test Description Equipment Procedure A power meter is used to measure the output level of the 100 MHz CAL OUTPUT signal. The 100 MHz Calibrator circuit on the A6A9 Phase Lock Assembly is adjusted as necessary for a -10.00 dBm output level. The harmonic level of the calibrator output signal is then checked using a second spectrum analyzer. Power Meter . . . . . . . . . . . . . . . .
PAGE 307
19. CAL Output Adjustment A6 ASSEMBL I ES COVER A6A9AlRll CAL ADJ c29 TRIPLER M A T C H Rll CAL OUTPUT RlO A6A9Al Figure 3-85. Location of CAL OUTPUT Adjustment Note A6A9AlRll CAL OUTPUT should have at least 2.0 dB of adjustment range, centered at a front-panel CAL OUTPUT signal level of -10.0 dBm. If A6A9AlRll CAL OUTPUT does not have sufficient range to adjust the CAL OUTPUT signal level to -9.
PAGE 308
19. CAL Output Adjustment CENTER 550 MHZ RES BW 3 MHZ “BW 3 MHZ SPAN 1 an GHZ SWP 25.a msec Figure 3-86. CAL OUTPUT Harmonics 10. On the second spectrum analyzer, press MARKER [PEAK SEARCH), [al to position a marker on the peak of the displayed 100 MHz signal.
PAGE 309
20. Last Converter Adjustments 20. Last Converter Adjustments Reference RF-Section: A6A3 Last Converter Description A 321.4 MHz signal from a synthesized sweeper is applied to the 321.4 MHz IF input of the A6A3 Last Converter Assembly, and the 321.4 MHz Bandpass Filter is adjusted. Then, a 310.7 MHz signal is applied to the 321.4 MHz IF input, and the 10.7 MHz Notch Filter is adjusted to null 10.7 MHz subharmonic spurious responses. Equipment Synthesized Sweeper . . . . . . . . . . . . . . . . . . . .
PAGE 310
20. Last Converter Adjustments SPECTRW ANALYZER Figure 3-87. Last Converter Adjustments Setup 4. Remove the RF Section right side cover (now on the left), and remove the two screws attaching the A6A3 Last Converter Assembly to the RF Section chassis. 5. Disconnect cable 1 (brown) from A6A3Jl 321.4 MHz IN, cable 2 (red) from A6A3J2 300 MHz IN, and cable 81 (gray/brown) from A6A3J3 (21.4 MHz OUT) on the A6A3 Last Converter Assembly. Remove the A6A3 Last Converter Assembly from the RF Section. 6.
PAGE 311
20. Last Converter Adjustments RIGHT SIDE COVER ASSE&L I ES COVER A6A3 LAST CONVERTER A6A3AlC23 1 0 . 7 MHz N O T C H FILTER ADJUST I L\A6A3ilC12 A6A3A.lClO A6A3ilC8 , Y 321.4 MHz BPF ADJUST Figure 3-88. Location of Last Converter Adjustments 10. Set the spectrum analyzer LINE switch to ON, and key in C-1, SWEEP [m). A HET UNLOCK message should appear on the CRT display. 11.
PAGE 312
20. Last Converter Adjustments 15. Move the probe to the access hole above A6A3AlC8 (the rightmost access hole). Adjust A6A3AlC9 (second access hole from the right) to minimize the amplitude of the 321.4 MHz signal displayed on the second spectrum analyzer. 16. With the probe still in the access hole above A6A3AlC8, adjust A6A3AlClO (center access hole) to maximize the amplitude of the 32 1.4 MHz signal displayed on the second spectrum analyzer. 17.
PAGE 313
20. Last Converter Adjustments Generator Assembly, and the A6A12 YTX Driver Assembly in the RF Section. Replace the cover on the A6 RF Module. 29. Reconnect cable 84 (gray/yellow) to A6A12Jl and cable 82 (gray/red) to A6A12J2. Reconnect cable 2 (red) to A6A9Jl 300 MHz OUTPUT, cable 0 (black) to A6A9J2 CAL OUTPUT, cable 85 (gray/green) to A6A9J3 100 MHz INPUT, cable 4 (yellow) to A6A9J4 VCO TUNE, and cable 5 (green) to A6A9J5 3.3 GHz INPUT. 30. Replace the RF Section bottom cover.
PAGE 314
2 1. Frequency Response Adjustments Reference RF Section: A6A3 Last Converter A6AlO Miscellaneous Bias/Relay Driver A6All Slope Generator A6A12 YTX Driver Related Performance Test Description Frequency Response Test Sweep + Tune Output Test The frequency response (flatness) and amplitude adjustments are performed for each of the spectrum analyzer frequency bands listed in ‘Iable 3-14. ‘Ihble 3-14. Frequency Bands Bands Harmonic Mixing Frequency Range Number/Mode OBandA l- IF Frequency 100 Hz - 2.
PAGE 315
2 1. Frequency Response Adjustments input mixer. In Band F (the external mixing bands), the output of an external harmonic mixer is connected to the front-panel 321.4 MHz IF INPUT, bypassing the two internal mixers. The frequency response of the spectrum analyzer is mainly determined by the two input mixers - the A6A6 First Converter Assembly and A6A8 YTX Assembly - and the associated A6A5 Amplifier/Coupler/Load Unit (ACLU) Assembly.
PAGE 316
2 1. Frequency Response Adjustments Adapters: Type N (f) to BNC (m) . . . . . Type N (f) to APC 3.5 (f) . . APC 3.5 (f) to APC 3.5 (f) . . . SMB (m) to SMA (f) . . . . . . . . . . APC 3.5 (m) to Type N (f) . . APC 3.5 (m) to Type N (m) . . BNC (f) to Dual Banana Plug ..... ..... ..... ..... ..... ..... .. . .. .. ..... .. . . . . .. ..... .. ..... . .. ..... .. ..... . HP . HP . HP . HP . HP . HP .
PAGE 317
2 1. Frequency Response Adjustments Rl IO RQ V E R12 VD R15 VC R18 V B R2i G A R86 R23 GB R25 GC R 2 7 GD R87 R29 GE R81 G F R89 R 3 1 LRl R90 R34 LR2 R37 LR3 R76 LR4 R40 LB1 R41 LB2 R42 LB3 R70 LB4 A12TP2,TP3 LOCK INDICATOR DISABLE / R84 GAIN R48 03 Al 02 R51 Dl R2 R 6 9 82 L R54 Cl B D R 7 2 C2 E Dl ZERO 3 - 9 V R75 5.8GHz R60 A6All \R78 E2 \R66 A6A12 \ 2GHz R64 Figure 3-90. Location of Frequency Response Adjustments 3.
PAGE 318
2 1. Frequency Response Adjustments verify that the power meter indication is -10.00 dBm fO.10 dB. If the 100 MHz CAL OUTPUT power level is not within this tolerance, perform adjustment procedure 19, “CAL OUTPUT Adjustment”, before continuing with this adjustment procedure. 6. Disconnect the power meter/power sensor from the speqtrum analyzer front-panel CAL OUTPUT connector. 7. Press (2-22) on the synthesized sweeper. Set the synthesized sweeper controls as follows: CW . . . . . . . . . . . . . . . . . .
PAGE 319
2 1. Frequency Response Adjustments Note f9 Vdc Reference Supplies adjustment A6A12R113 -9 V affects YTX/YTO tracking, YTX diode bias, and Slope Generator Upper/Lower Segment frequency breakpoints in all preselected frequency bands (Bands B, C, D, and E, 2 GHz - 22 GHz). 16. Adjust 17-turn potentiometer A6A12R113 -9 V for a DVM indication of -9.000 fO.OO1 Vdc. See Figure 3-90 for the location of A6A12R113. 17. Press C2--22J on the spectrum analyzer.
PAGE 320
2 1. Frequency Response Adjustments 22. On the synthesized sweeper, press CPOWER LEVEL] and adjust the ENTRY knob as necessary for a power meter indication of -15.00 dBm *2.00 dB at 100 MHz. 23. On the power meter, press (RANGE HOLD) (turning it on). 24. On the synthesized sweeper, press (POWER LEVEL) and adjust the ENTRY knob for a power meter indication of -10.00 dBm f0.03 dB at 100 MHz. 25.
PAGE 321
2 1. Frequency Response Adjustments 32. On the spectrum analyzer, key in 1-1, (SHIFT] TRACE A @iXKKK] b. Set the spectrum analyzer controls as follows: START FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 MHz STOP FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 GHz RESBW.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3MHz REFERENCE LEVEL . . . . . . . . . .
PAGE 322
2 1. Frequency Response Adjustments clockwise to increase the level of the displayed signal responses above 500 MHz. Note It might be helpful to increase or decrease the spectrum analyzer TIME) setting while adjusting A6AllR66 A2 and A6AllR48 Al, particularly when making fine adjustments. An increase in spectrum analyzer sweep time results in closer spacing of the displayed responses, but slows the adjustment. [SWEEP 36.
PAGE 323
2 1. Frequency Response Adjustments set to internal leveling, which introduces minor leveling errors but permits much faster sweep times. 40. Repeat steps 33 through 39 as necessary until the total peak-to-peak deviation of the TRACE B waveform is less than 1.20 dB. Leave the TRACE B reference waveform in VIEW for steps 33 through 36 to indicate which portions of the frequency response waveform require relative adjustment.
PAGE 324
2 1. Frequency Response Adjustments Band B, 2.0 GHz to 5.8 GHz 46. On the spectrum analyzer, key in @?iTEiC), CFREQUENCY Hz, (CENTER FREQUENCY) 4 GHz, SWEEP @iKZ]. SPAN) 0 47. Connect the DVM to A6AlZTP3 (-9 V), and connect the DVM ground to A6A12TP2 (YTX COM) in the RF Section. See Figure 3-90 for the location of A6A12TP3 and A6A12TP2.
PAGE 325
2 1. Frequency Response Adjustments sweeper front panel LEVELING EXT INPUT using a BNC to SMB snap-on test cable. POmR SENSOR Figure 3-94. Frequency Response Adjustments Setup (2.0 GHz to 22.0 GW 54. Press (2-22j on the synthesized sweeper. Set the controls of the synthesized sweeper as follows: CW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 MHz POWER LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . -4.0 dBm RF . . . . . . . . . . . . . . . . .
PAGE 326
21. Frequency Response Adjustments signal on the spectrum analyzer display. See Figure 3-90 for the locations of A6A12R63 5.8 GHz and A6AlOR18 VB. Note If A6A12 YTX Driver Assembly is HP P/N 85660-60235 (HP 85660AB RF Sections serial number prefixed 2503A or above), and A6A12R63 5.8 GHz does not have sufficient adjustment range in this step (or steps 61, 66, or 75), check the value of factory-select component A6A12R64.
PAGE 327
2 1. Frequency Response Adjustments 70. Set the synthesized sweeper controls as follows: START FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.0 GHz STOP FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.8 GHz RF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on LEVELING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 328
2 1. Frequency Response Adjustments spectrum analyzer, key in [SWEEP TIME) 5s, LOG SCALE dB/Divj 1 dB, TRACE B IVIEW), m 4, C-1 2s, TRACE B [j], IHOLD). 73. On the [ENTER 74. Readjust 17-turn (YTX Diode Bias) potentiometer A6AlOR18 VB to maximize the overall level of the displayed signal responses from 2.0 GHz to 5.8 GHz on the spectrum analyzer display. 75. Readjust 25-turn (YTX Drive) potentiometers A6A12R63 5.
PAGE 329
2 1. Frequency Response Adjustments 81. On the spectrum analyzer, key in [=I 4, m IGHz) / and use the DATA knob to gradually change the PRESELECTOR DAC setting from 32, maximizing the level of the TRACE A displayed signal responses at the lowest point on the TRACE B waveform. Note the PRESELECTOR DAC setting. 82. On the spectrum analyzer, key in L-1 6, LSHIFT) (GHz) / and enter in the PRESELECTOR DAC setting from step 81.
PAGE 330
2 1. Frequency Response Adjustments acceptable range of values for A6AlOR87, and Table 3-4 for HP part numbers. See Figure 3-90 for the location of A6AlOR87. Band C, 5.8 GHz to 12.5 GHz 90. On the spectrum analyzer, key in @=TEZT@, @iYiE] [PRESEL PEAK_) =, [SHIFT] TRACE A (HOLD] b. Set the spectrum analyzer controls as follows: START FREQ . . . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.8 GHz STOP FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 331
2 1. Frequency Response Adjustments peaks of these responses coarsely outline the spectrum analyzer frequency response. I I I II S T A R T 5.88 START 5.88 GHZ GHZ RES I I I q W 3 MHZ I II I II “BW I 3 MHZ I I I II I I II I I I u STOP 112.58 2 . 5 8 GHZ GHZ SWP 2.00 set Figure 3-97. Typical Coarse Frequency Response (5.8 GHz - 12.
PAGE 332
2 1. Frequency Response Adjustments 101. Readjust 22-turn (IF Offset) potentiometer A6A12R84 C as necessary to maximize the overall level of the displayed signal responses from 5.8 GHz to 12.5 GHz on the spectrum analyzer display. If the displayed signal responses above mid-band drop off in amplitude and peak at a different setting of A6A12R84 C perform the following steps: a. Perform step 51 if it has not already been performed. b.
PAGE 333
2 1. Frequency Response Adjustments START I I I 5 . 8 0 GHZ RES ew 3 M”Z I “BW 3 MHZ I STOP 1 2 50 GHZ SWP 150 set Figure 3-98. 5Pi .cal Frequency Response (5.8 GFh - 12.5 GHz) 105. On the spectrum analyzer, key in [FiQ 4, m and repeat steps 100 through 102 as necessary. 106. On the spectrum analyzer, key in @ZZQ 5 and wait for the sweep to complete (150 seconds) and the SWEEP LED to turn Off. 107.
PAGE 334
2 1. Frequency Response Adjustments 3.40 dB. See the TRACE B reference waveform to indicate which portions of the frequency response waveform require relative adjustment. 113. On the spectrum analyzer, key in (ml 4, m). 113. On the synthesized sweeper, press Icw) and enter the frequency recorded in step 111, positioning the displayed TRACE A signal response at the highest point on the TRACE B waveform.
PAGE 335
2 1. Frequency Response Adjustments the displayed 15.0 GHz signal. Adjust 17-turn (Band D Step Gain) potentiometer A6AlOR27 GD as necessary to adjust the amplitude of the displayed 15.0 GHz marker to -10.00 dBm fO.10 dB. Adjust A6AlOR27 GD counterclockwise to increase the signal level, and clockwise to decrease the signal level. If A6AlOR27 GD does not have sufficient range, adjust the amplitude of the displayed 15.0 GHz marker as close as possible to -10.00 dBm.
PAGE 336
2 1. Frequency Response Adjustments the high end of the band drop in amplitude by approximately 0.75 dB. 126. Readjust 22-turn (IF Offset) potentiometer A6A12R83 D as necessary to maximize the overall level of the displayed signal responses from 12.5 GHz to 18.6 GHz on the spectrum analyzer display. If the displayed signal responses peak at widely different settings of A6A12R83 D, perform the following steps: a.
PAGE 337
21. Frequency Response Adjustments 130. On the spectrum analyzer, key in (j-1 4, (HOLD) and repeat steps 126 through 128 as necessary. 131. On the spectrum analyzer, key in (ml 5 and wait for the sweep to complete (150 seconds) and the SWEEP LED to turn Off. 132. On the spectrum analyzer, key in (mj 4, m (GHz) / and use the DATA knob to gradually change the PRESELECTOR DAC setting from 32, maximizing the level of the TRACE A displayed signal responses at the lowest point on the TRACE B waveform.
PAGE 338
2 1. Frequency Response Adjustments Note Band E, 18.6 GHz to 22 GHz If A6AlO Miscellaneous Bias/Relay Driver Assembly is HP P/N 85660-60322 (HP 85660AB RF Sections with serial number prefix 2747A or above), and A6AlOR27 GD does not have sufficient range, change the value of factory-select component A6AlOR88. Increase the value of A6AlOR89 to decrease the signal level, and decrease the value of A6AlOR89 to increase the signal level.
PAGE 339
2 1. Frequency Response Adjustments SWEEP TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 ms SWEEP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CONT 148. On the spectrum analyzer, key in TRACE A [CLEAR-WRITE), (SWEEP TIME) 2s, MARKER (OFF), I=]. As the spectrum analyzer completes each sweep, a series of approximately 23 new responses should be displayed.
PAGE 340
2 1. Frequency Response Adjustments marker. See Figure 3-90 for the locations of A6AlOR70 LB4 and A6AlOR76 LR4. e. Readjust 22-turn (YTX Linearity) potentiometer A6AlOR76 LR4 clockwise to maximize the displayed signal responses at the high end of the band. f. Readjust A6A12R82 E and A6AlOR76 LR4 as necessary to maximize the displayed signal responses from 18.6 GHz to 22.0 GHz on the spectrum analyzer display. 153.
PAGE 341
21. Frequency Response Adjustments 4.40 dB from 18.6 GHz to 20.0 GHz, and 6.00 dB from 20.0 GHz to 22.0 GHz. See the TRACE B reference waveform to indicate which portions of the frequency response waveform require relative adjustment. 164. On the spectrum analyzer, key in (jjj 4, (HOLD). 165. On the synthesized sweeper, press Icw] and enter the frequency recorded in step 163, positioning the displayed TRACE A signal response at the highest point on the TRACE B waveform.
PAGE 342
2 1. Frequency Response Adjustments STOP FREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18.6 GHz RES BW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 MHz REFERENCE LEVEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -7 dBm LOG SCALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 dB/DIV SWEEP TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 343
2 1. Frequency Response Adjustments 177. If the Preselector DAC value difference recorded in step 176 is greater than f0.5, remove the A6A12 YTX Driver Assembly from the RF Section and determine the current values of factory-select components A6A12C1, A6A12C2, A6A12Cl1, and A6A12C23. Then, refer to Table 3-16 to determine the final capacitor values to install for A6A12C1, A6A12C2, A6A12Cl1, and A6A12C23.
PAGE 344
PAGE 345
2 1. Frequency Response Adjustments LOG SCALE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 dB/DIV 187. Press MARKER (-1 and adjust (IF Step Gain) potentiometer A6AlOR81 GF for a marker indication of 0.00 dBm fO.O1 dB. Note If A6AlO Miscellaneous Bias/Relay Driver Assembly is HP P/N 85660-60322 (HP 85660AB RF Sections with serial number prefix 2747A or above), and A6AlOR81 GF does not have sufficient range, change the value of factory-select component A6AlOR91.
PAGE 346
22. Analog-To-Digital Converter Adjustments Reference Description A3A8 Analog-to-Digital Converter The Analog-to-Digital Ramp Converter is adjusted at zero and full-scale by injecting a 0 V dc input and + 10 V dc input and adjusting the OFFS and GAIN controls until the ramp output at A3A8TPll toggles high to low.
PAGE 347
22. Analog-To-Digital Converter Adjustments d. Connect the oscilloscope channel 1, 10: 1 probe to A3A8TPll and ground the probe ground to the A3 section’s card cage. e. Set the oscilloscope settings as follows: Press (CHAN) Channel 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . on probe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..lO.l amplitude scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 348
22. Analog-To-Digital Converter Adjustments A3A8 ANALOG-TO-DIGITAL CONVERTER (Beneath Cover) TPll G::N TP4 TP5 A3A8 GA,,, Figure 3-101. Location of Analog-lb-Digital Converter Adjustments Alternate Procedure 4 . Procedure without using Low-Noise DC Supply: a. Press (2-22]. b. Key in TRACE A ljZZZ] and SWEEP [w). C. Disconnect cable 0 (black) from sweep ramp input A3ASJl. d. Short A3ASTP4 to A3ASTP5 or connect SMB snap-on short to A3ASJl. e. Connect DVM to A3ASTPll and ground to A3ASTP4.
PAGE 349
23. Track and Hold Adjustments 23. Track and Hold Adjustments Reference Description A3A9 Track and Hold The CAL OUTPUT signal is connected to the RF INPUT. The spectrum analyzer is placed in zero frequency span to produce a dc level output from the IF-Video section and this dc level is regulated by adjusting the reference level. The Offsets and Gains on the Track and Hold assembly are adjusted for proper levels using a DVM. Figure 3-102.
PAGE 350
23. Track and Hold Adjustments A3A9 TRACK AND HOLD (Beneath Cover) A3A9 Figure 3-103. Location of Track and Hold Adjustments 10. Key in [m) TRACE A (jj) b. 11. Adjust A3A9R44 OFFS POS until MARKER A level indication as indicated by CRT annotation flickers back and forth between .OO and .lO dB. 12. Key in ISHIFT_) TRACE A (VIEW) d. 13. Adjust A3A9R36 OFS NEG until MARKER A level indication as indicated by CRT annotation flickers back and forth between .OO and .lO dB. 14. Key in (SHIFT) TRACE A (jj) e.
PAGE 351
23. Track and Hold Adjustments 25. Repeat steps 4 through 24 until no further adjustments are required.
PAGE 352
24. Digital Storage Display Adjustments Reference Description A3A 1 Trigger A3A2 Intensity Control A3A3 Line Generator First, preliminary CRT graticule adjustments are performed to position the graticule on the CRT. These preliminary adjustments assume that repair has been performed on the associated circuitry. If no repair has been performed on the assemblies listed under REFERENCE, the preliminary adjustments are not necessary. Next, the Sample and Hold Balance adjustments are performed.
PAGE 353
24. Digital Storage Display Adjustments Preliminary Graticule Adjustments 3. Press TRACE A @KiiKJ 4. Adjust A3A3R4 X GAIN and A3A3R5 Y GAIN to place graticule information completely on CRT. See Figure 3-105 for location of adjustment. 5. Adjust A3A2R12 LL THRESH fully clockwise. See Figure 3-105 for location of adjustment. A3A1 TRIGGER &,?A? INTENSITY CONTROL A3A3 L I NE GENERATOR \ \ \ R12 LL THRESH R51 Y S & H BAL z z R34 SWP OFFSET R50 X S & Ii BAL A3Al Figure 3-105.
PAGE 354
24. Digital Storage Display Adjustments 11. Adjust A3A3R8 YSL so that the vertical graticule lines just meet the horizontal graticule lines at the top and bottom of the graticule. 12. Repeat steps 10 and 11 until horizontal and vertical graticule lines are adjusted so that they meet at the edges of the graticule but do not overshoot. Sample and Hold Balance Adjustments 13. Set spectrum analyzer LINE switch to STANDBY. 14. Place A3A3 Line Generator on extender boards. 15.
PAGE 355
24. Digital Storage Display Adjustments 5 0 . 0 nV/div 1 offset: 0 . 0 0 0 v 10.00 : I dc i ..__...~~~....... -.- _.._.._.__._.....__. - ._._........._._ i ..~.....-” . . _ . . . . . . . . . . . ” .._.......,,.,..,.,.,,,,,.,,,,.,,,,..,.,,,,,,,.,... * 2 . 1 0 0 0 0 us - 2 . 9 0 0 0 0 us - 4 0 0 . 0 0 0 ns 5 0 0 ns/div 4 f 3 0 0 . 5 IV Figure 3-106. Sample and Hold Balance Adjustment Waveforms hf r u n n i n g : ._.. - ! ! ! - .._. -.__- ._......._.................................~..~..............
PAGE 356
24. Digital Storage Display Adjustments X and Y Offset and Gain Adjustments 24. Press (2-22]. 25. Key in (FREQUENCY SPAN] 0 Hz, [SWEEP TIME] 100 ps. 26. Disconnect cable 9 (white) from A3A9J2 and connect to A3A2J2 LG/FS test connector on A3A2 Intensity Control; the other end of the cable remains connect connected to A3A2Jl. 27. Select TRIGGER (VIDEO) and adjust front-panel LEVEL control for a stable display on instrument CRT. 28.
PAGE 357
24. Digital Storage Display Adjustments Final Graticule Adjustments 41. Press @??ZiZJ, TRACE A ~~~. 42. Set A3A2R12 LL THRESH fully clockwise. 43. Adjust A3A3R6 XLL and A3A3R9 YLL to align horizontal and vertical lines so that each line meets the edge line (right, left, top, or bottom) but does not overshoot. 44. Adjust A3A2R12 LL THRESH fully counterclockwise. 45.
PAGE 358
Low-Noise DC The Low-Noise DC Supply shown in Figure 3-108 can be constructed using the parts listed in ‘Ihble 3-17. SUPPlY OUTPUT OVdc, +2Vdc o r +10 V d c Figure 3-108. Low-Noise DC Supply ‘hble 3-17. Parts for Low-Noise DC Supply - Reference/Designation HP Fart Number CD Description Cl 0160-2055 9 CAPACITOR FXD .Ol pf 3-216 Adjustments Jl 1250-0083 1 CONNECTOR BNC Rl 0698-0083 8 RESISTOR FXD 1.96K 1% .125W R2 0757-0442 9 RESISTOR FXD 10K 1% .125W R3 0757-0442 9 RESISTOR FXD 10K 1% .
PAGE 359
Crystal Filter Bypass Network Configuration Cm&al Filter Bypass Network Configuration The Crystal Filter Bypass Network Configuration shown in Figure 3-109 can be constructed using the parts listed in Table 3-18 and Table 3-19. Table 3-18 list the parts required for the construction of 21.4 MHz IF crystal-filter bypass networks used with the A4A4 and A4A8 assemblies. Two 21.4 MHz bypass networks are required.
PAGE 360
4 Option 462 Introduction This chapter contains modified performance tests and adjustment procedures for Option 462 instruments. When working on Option 462 instruments, substitute the procedures in this chapter for the standard versions contained in chapters two and three. For earlier Option 462 instruments (HP 85662A serial prefixes below 3341A) in which impulse bandwidths are specified, use the tests and adjustment under “Impulse Bandwidths”.
PAGE 361
3. 6 dB Resolution Bandwidth Accuracy ‘I&t Related Adjustment Specification 6 dB Bandwidth Adjustments f20%, 3 MHz bandwidth f lO%, 30 Hz to 1 MHz bandwidths + 50%, -0%, 10 Hz bandwidth 30 kHz and 100 kHz bandwidth accuracy figures only applicable 590% Relative Humidity, 140” C . Description Equipment Procedure The 6 dB bandwidth for each resolution bandwidth setting is measured with the MARKER function to determine bandwidth accuracy. The CAL OUTPUT is used for a stable signal source. None required 1.
PAGE 362
3. 6 dB Resolution Bandwidth Accuracy Test hP hP REF -9.0 -9.0 REF dBm ATTEN 10 MKR a 3.103 MHZ 0.00 dE dB LINEAR CENTER 100.00 MHz RES BW 3 MHz VBW 3 SPAN 5.00 MHz SWP 20.0 nl15ec MHz Figure 4-1. Resolution Bandwidth Measurement 8. Vary spectrum analyzer settings according to ‘fable 4-l. Press SWEEP @KZF] C-1 and measure the 6 dB bandwidth for each resolution bandwidth setting by the procedure of steps 6 and 7 and record the value in Table 4- 1.
PAGE 363
3. Impulse and Resolution Bandwidth Accuracy T&t Related Adjustment Specification Description Impulse Bandwidth Adjustments f20%, 3 MHz bandwidth f 1096, 1 MHz to 1 kHz bandwidths -0, +50%, 300 Hz to 10 Hz (6 dB bandwidths) A frequency synthesizer and pulse/function generator are used to input pulses to the spectrum analyzer. The amplitude of the pulses is measured, and the impulse bandwidths are calculated for each impulse bandwidth from 3 MHz to 1 kHz.
PAGE 364
3. Impulse and Resolution Bandwidth Accuracy Test Procedure 1. Set the frequency synthesizer for a 15 MHz, + 13 dBm output. Connect the output of the frequency synthesizer to the EXT INPUT of the pulse/function generator. 2. Set the pulse/function generator controls as follows: MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TRIG EXT INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . positive-going EXT INPUT LEVEL . . . . . .
PAGE 365
3. Impulse and Resolution Bandwidth Accuracy Test 13. Press MARKER [PEAK SEARCH). Record the MARKER amplitude in ‘lhble 4-2. 14. Calculate the impulse bandwidth of the 1 MHz filter using the formula in step 8. Record the result in ‘Iable 4-2. 15. Set the frequency synthesizer [FREQUENCY] to 3 MHz. Set the pulse/function generator WID to 33.3 ns. 16. On the spectrum analyzer, key in: (jj] 300 kHz (i), FREQUENCY] 3 MHZ, [FREQUENCY SPAN) 1.2 MHZ, SWEEP TIME IAUTO), SWEEP (SINGLE), MARKER [PEAK SEARCH].
PAGE 366
3. Impulse and Resolution Bandwidth Accuracy Test 29. Set the frequency synthesizer (FREQUENCYI to 1 kHz. On the spectrum analyzer key in: @ REQUENCY SPAN) 0 Hz, [SWEEP TIME) 0.5 seconds, SWEEPJGLE), (G MARKER FEAK SEARCH). Record MARKER amplitude in Table ! 4-2. 30. Calculate the Impulse BW of the 10 kHz filter using the formula in step 8. Record in Table 4-2. 31. Set the frequency synthesizer (FREQUENCY) to 30 kHz. Set the pulse/function generator WID to 3.33 ps. 32.
PAGE 367
3. Impulse and Resolution Bandwidth Accuracy Test dB). ‘lb center the trace on screen, it may be necessary to press SWEEP (ZGY) and adjust (CENTER FREQUENCY). 45. Press MARKER Ia] and position movable marker 6 dB down from the signal peak on the negative going edge of the trace (the MARKER [nl amplitude readout should be 0.00 dB *O.O5dB). The 6 dB bandwidth is given by the MARKER [nl frequency readout. (See Figure 4-3.) Record in Table 4-2.
PAGE 368
3. Impulse and Resolution Bandwidth Accuracy Test ‘Ihble 4-2. Impulse Bandwidth Accuracy 1 Calculated Impulse Bandwidth Marker Readouts for: -4 1 MHz (i) Maximum Low Frequency Repetition Rate 2.40 MHz 3.60 MHz 3 MHz 900 kHz 1.1 MHz 300 kHz (i) 3 MHz 270 kHz 330 kHz 100 kHz (i) 1 MHz 90 kHz 110 kHz 30 kHz (i) 300 kHz 27 kHz 33 kHz 10 kHz (i) 100 kHz 9 kHz 11 kHz 3 kHz (i) 30 kHz 2.7 kHz 3.3 kHz 1 kHz (i) 10 kHz 900 Hz 1.1 kHz 3 MHz (i) ‘I&ble 4-3.
PAGE 369
4. 6 dB Resolution Bandwidth Selectivity Tkst Related Adjustments Specification 3 MHz Bandwidth Filter Adjustments 21.4 MHz Bandwidth Filter Adjustments Step Gain and 18.
PAGE 370
4. 6 dB Resolution Bandwidth Selectivity Test 7. Vary spectrum analyzer settings according to Table 4-4. Press SWEEP (SINGLE) and measure the 60 dB bandwidth for each resolution bandwidth setting by the procedure of steps 4 through 6. Record the value in Table 4-4. 8. Record the 6 dB bandwidths from Table 4-l in Table 4-4. 9. Calculate the bandwidth selectivity for each setting by dividing the 60 dB bandwidth by the 6 dB bandwidth.
PAGE 371
4. 6 dB Resolution Bandwidth Selectivity Test able 4-4.
PAGE 372
4. Impulse and Resolution Bandwidth Selectivity Test 4. Impulse and Resolution Bandwidth Selectivity !kst Related Adjustment Specification Description Note Equipment Procedure 3 MHz Bandwidth Filter Adjustments 2 1.4 Bandwidth Filter Adjustments Step Gain and 18.
PAGE 373
4. Impulse and Resolution Bandwidth Selectivity Test f?P 10 REF 0.0 dBrn ATTEN 10 MKR A 14.04 MHz -0.30 dB dB dB/ I CENTER 100.0 MHZ RES BW 3 MHz VBW II 100 HZ SPAN 20.0 MHz SWP 500 msec Figure 4-5. 60 dB Bandwidth Measurement 4. Press MARKER [al and position the positive movable marker 60 dB down from the signal peak on the negative-going edge of the signal trace (the MARKER Ia] amplitude readout should be 0.00 dB f0.50 dB). 5.
PAGE 374
4. Impulse and Resolution Bandwidth Selectivity Test ‘Ihble 4-5.
PAGE 375
5. Impulse and Resolution Bandwidth Switching Uncertainty Tkst Related Adjustment 3 MHz Bandwidth Filter Adjustments 21.4 MHz Bandwidth Filter Adjustments Down/Up Converter Adjustments Specification f2.0 dB, 10 Hz bandwidth *0.8 dB, 30 Hz bandwidth f0.5 dB, 100 Hz to 1 MHz bandwidth fl.O dB, 3 MHz bandwidth 30 kHz and 100 kHz bandwidth switching uncertainty figures only applicable 590% Relative Humidity. Description The CAL OUTPUT signal is applied to the input of the spectrum analyzer.
PAGE 376
5. Impulse and Resolution Bandwidth Switching Uncertainty Test h! REF I -8.0 dEm I I ATTEN I 10 dB I I I I I MKR ~3 0 0.00 dB I Hz I n CENTER I I I I 100.00 MHz RES q W 3 MHz VBW 3 MHz SPAN 5.00 MHz SWP 20.0 m3ec Figure 4-6. Bandwidth Switching Uncertainty Measurement Table 4-6. Bandwidth Switching Uncertainty Res BW Frequency Span Deviation Allowable (MKR A Deviation Readout, dB) w-9 1 MHz (i) 5 MHz 0 (ref.) 0 (ref.) 3 MHz (i) 5 MHz f 1.0 ;OO kHz (i) 5 MHz f 0.
PAGE 377
Tkst 3. 6 dB Resolution Bandwidth Accuracy ‘J&t (p/o Sble 2-24, Performance Tkst Record) Step 8. 6 dB Resolution Bandwidth Accuracy L Readout of 3 dB Bandwidth Min 4-18 Option 462 Actual 3 MHz 5 MHz 2.400 MHz 3.600 MHz 1 MHz 2 MHz 900 kHz 1.100 MHz 300 kHz 500 kHz 270.0 kHz 330.0 kHz 100 kHz 200 kHz 90.0 kHz 110.0 kHz 30 kHz 50 kHz 27.00 kHz 33.00 kHz 10 kHz 20 kHz 9.00 kHz 11.00 kHz 3 kHz 5 kHz 2.700 kHz 3.300 kHz 1 kHz 2 kHz 900 Hz 1.
PAGE 378
Test 3. Impulse and Resolution Bandwidth Accuracy Test (p/o ‘Ihble 2-24, Performance Test Record) T&t 3. Impulse and Resolution Bandwidth Accuracy Wst (p/o able 2-24, Performance Tkst Record) (-pziiq Steps 1 through 38. Impulse Bandwidth Accuracy lJ7EzGJ Marker Readouts for: Calculated Impulse Bandwidth High Frequency Low Frequency Minimum Actual Maximum Repetition Rate Repetition Rate 3 MHz (i) 3 MHz 2.40 MHz 3.60 MHz 1 MHz (i) 3 MHz 900 kHz 1.
PAGE 379
Test 3. Impulse and Resolution Bandwidth Accuracy Test (p/o ‘able 2-24, Performance Test Record) Steps 39 through 46.
PAGE 380
Test 4. 6 dB Resolution Bandwidth Selectivity (p/o ‘Ihble 2-24, Performance Test Record) Ikst 4. 6 dB Resolution Bandwidth Selectivity (p/o able 2-24, Performance Tkst Record) Step 9.
PAGE 381
Tkst 4. Impulse and Resolution Bandwidth Selectivity (p/o able 2-24, Performance T&t Record) Steps 5 through 9.
PAGE 382
Test 5. Impulse and Resolution Bandwidth Switching Uncertainty (p/o ‘Ihble 2-24, Performace Test Record) Tkst 5. Impulse and Resolution Bandwidth Switching Uncertainty (p/o ‘lhble 2-24, Performace Tkst Record) Step 5. Impulse and Resolution Bandwidth Switching Uncertainty Deviation Allowable Deviation (MKR A Readout, dB) WV Res BW Frequency Span 1 MHz (i) 5 MHz 3 MHz (i) 5 MHz f 1.0 300 kHz (i) 5 MHz f 0.5 100 kHz (i) 500 kHz f 0.5 30 kHz (i) 500 kHz f 0.5 10 kHz (i) 50 kHz f 0.
PAGE 383
9. 6 dB Resolution Bandwidth Adjustments Reference Related Performance Test Description Equipment Procedure IF-Display Section A4A9 IF Control 6 dB Resolution Bandwidth Accuracy Test The CAL OUTPUT signal is connected to the RF INPUT. Each of the adjustable resolution bandwidths is selected and adjusted for the proper bandwidth. No test equipment is required for this adjustment. 1. Position the instrument upright and remove the top cover. 2. Set the LINE switch to On and press (2--22). 3.
PAGE 384
9. 6 dB Resolution Bandwidth Adjustments 13. Using the DATA knob, adjust the marker down one side of the display signal to the 6 dB point; CRT MKR A annotation indicates A500 x. A4A9 IF CONTROL \ A4A9 Figure 4-7. Location of Bandwidth Adjustments 14. Adjust A4A9R61 1 MHz for MKR A indication of 500 kHz while maintaining the marker at 0.500 X using the DATA knob. Refer to Figure 4-7 for the adjustment location. 15. Press MARKER la].
PAGE 385
9. 6 dB Resolution Bandwidth Adjustments 24. Press MARKER IOFF), then MARKER [nl. 25. Using the DATA knob, adjust the marker down one side of the displayed signal to the 6 dB point; CRT MKR annotation indicates .500 x. 26. Adjust A4A9R65 10 kHz for MKR A indication of 5.00 kHz while maintaining the marker at .500 X using the DATA knob. Refer to Figure 4-7 for the adjustment location. 27. Press MARKER a].
PAGE 386
9. Impulse Bandwidth Adjustments 9. Impulse Bandwidth Adjustments Reference Related Performance Test Description Equipment Procedure IF-Display Section A4A9 IF Control Impulse Bandwidth Accuracy Test The CAL OUTPUT signal is connected to the RF INPUT. Each of the adjustable resolution bandwidths is selected and adjusted for the proper impulse bandwidth. No test equipment is required for this adjustment. 1. Position the instrument upright and remove the top cover. 2.
PAGE 387
9. Impulse Bandwidth Adjustments 13. Using the DATA knob, adjust the marker down one side of the display signal to the 7.3 dB point; CRT MKR A annotation indicates 0.430 X. A4A9 IF CONTROL \ Figure 4-8. Location of Bandwidth Adjustments 14. Adjust A4A9R61 1 MHz for MKR A indication of 500 kHz while maintaining the marker at 0.430 X using the DATA knob. Refer to Figure 4-8 for the adjustment location. 15. Press MARKER a]. Adjust marker to the opposite side of the signal (CRT MKR A annotation indicate 1.
PAGE 388
9. Impulse Bandwidth Adjustments [REFERENCE LEVEL_) and using the DATA knob to place the signal peak near the top of the graticule. 24. Press MARKER IOFF), then MARKER a]. 25. Using the DATA knob, adjust the marker down one side of the displayed signal to the 7.3 dB point; CRT MKR annotation indicates 0.430 X. 26. Adjust A4A9R65 10 kHz for MKR A indication of 5.00 kHz while maintaining the marker at 0.430 X using the DATA knob. Refer to Figure 4-8 for the adjustment location. 27. Press MARKER la].
PAGE 389
5 Option 857 Introduction This chapter contains the modified amplitude fidelity performance test for Option 857 instruments. This chapter also contains the modified amplitude fidelity portion of the Test Record for Option 857 instruments.
PAGE 390
8. Option 857 Amplitude Fidelity Performance Tkst Related Adjustment Specification Log Amplifier Adjustments Log: Incremental f0.1 dB/dB over 0 to 80 dB display Cumulative 3 MHz to 30 Hz Resolution Bandwidth: sf0.6 dB max over 0 to 70 dB display (20 to 30°C) 24~ 1.5 dB over 0 to 90 dB display 10 Hz Resolution Bandwidth: sf0.8 dB over 0 to 70 dB display (20 to 30°C) sf2.
PAGE 391
8. Option 857 Amplitude Fidelity Performance Test Equipment Procedure Frequency Synthesizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 3335A Adapter, Type N (m) to BNC (f) . . . . . . . . . . . . . . . . 1250-0780 BNC Tee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-0781 Log Fidelity 1. On the spectrum analyzer, connect the CAL OUTPUT to the RF INPUT. Press (jj] 9 and adjust the FREQ ZERO pot for maximum amplitude. 2. Press (:!Ion the analyzer.
PAGE 392
8. Option 857 Amplitude Fidelity Performance Test 14. Key in the following analyzer settings: FREQUENCY SPAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 kHz [m, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 kHz SWEEP ICoNTl 15. Press MARKER [PEAK SEARCH], fjj], center the signal on the display. CMRK + REF LVL~ to 16. Key in the following analyzer settings: FREQUENCY SPAN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 393
8. Option 857 Amplitude Fidelity Performance Test ‘lhble 5-2. Log Amplitude Fidelity (10 kHz RRW; Option 857) Frequency 1 2 Fidelity Error Synthesizer Calibrated MARKER A Amplitude (Column 2 - Column 1: Amplitude Amplitude WV (W Step (mm) +lO 0 (ref) 0 -10 -10 -20 -20 -30 -30 -40 -40 -50 -50 -60 -60 -70 -70 -80 -80 -90 Linear Fidelity 0 (ref) 0 (ref) 21. Key in analyzer settings as follows: @iEiET] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 394
Performance Tkst Record 5-6 Option 857 Hewlett-Packard Company Model HP 8566B Tested by Report No. Serial No.
PAGE 395
Test 8. Option 857 Amplitude Fidelity Ykst 8. Option 857 Amplitude Fidelity Step 9. Log Amplitude Fidelity (10 Hz RRW) Cumulative Cumulative Frequency 1 2 Fidelity Error Synthesizer Calibrated MARKER A Amplitude (Column 2 - Column 1) Error Error WV PI 0 to 70 dB 0 to 90 dB Amplitude Amplitude Step ww VW W) + 10 0 (ref) 0 -10 -10 -20 -20 -30 -30 -40 -40 -50 -50 -60 -60 -70 -70 -80 -80 -90 0 (ref) 0 (ref) s&O.8 dB sf2.1 dB Step 18.
PAGE 396
Test 8. Option 857 Amplitude Fidelity Step 26. Linear Amplitude Fidelity Allowable Range Frequency MARKER A Synthesizer Amplitude (f3% of Reference Level) Amplitude WI Wm) Min 0 -10 5-R Option 857 - 10.87 -9.21 -23.10 - 17.
PAGE 397
6 Major Assembly and Component Locations IF-Display Section Figure Index Assembly See Figure AlAl . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6 AlA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4, 6-5 AlA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4; 6-5 AlA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4 AlA . . . . .
PAGE 398
W23 W24 W25 W26 W27 W28 W29 W32 RF Section Figure Index 6-2 ................................................ ................................................ ................................................ ................................................ ................................................ ................................................ ................................................ ................................................
PAGE 399
A24 FAN A23C4 (+5V) A23Q4 A23Ul A23C3 W15(+2OV) A2303 A 2 3Q2 A 2 3Ql A23C2 / (-4OV) A23W5 A23 ’ MOTHERBOARD - A23W6 0 \ \ .--....--.------- A23W7 A6A13 RF MODULE MOTHERBOARD A6A6 FIRST CONVERTER Figure 6-1.
PAGE 400
A6J5 A6J4 A6J2 A6Jl ld:“T O&T ::fPb? C A L O U T P U T A5A2 RPG A23W7 A23W5 A6Rl AMPTD CAL A6J3 RF INPUT A5A 1 KEYBOARD A5SWl STANDBY/ON Figure 6-2.
PAGE 401
A23C2 A23C3 A23C4 (-40V)(+20V) (+5V) A22 A l 7 TH;F?yGH Fd~Q#%CY A24 STANDARD A23C 1 (-IOV) Al 1 M/N-REFEREN:; /YTo A l 2 42 TRANSFORM;; R F MOD”?: \A10 20 30 S Yr: THESIZER b GA15-3L Figure 6-3.
PAGE 402
AIAIOCI AlAlOC4 AlA AlA AlA AlA FL1 AITI A l AlOC2 AlAlOC3 A4A9 AlA A4A8 w7 A4A7 A4A6 w21 A4A5 AlA A4A4 AIAI 1 A4A3 W6 A4A2 w21 . A4A 1 A3A9 A3A8 AlA A3A7 A3A6 A3A5 A3A4 AIVI A3A3 A3A2 I ‘A3Al AlA I 8I Figure 6-4.
PAGE 403
AlA AIAIOCI AlA AlA AITI FL1 AlAlOC4 AlAlOC2 AlAlOC3 ,A4A9 ,A4A8 ,A4A7 ,A4A6 ,A4A5 ,A4A4 ,A4A3 ,A4A2 ,A4Al AlA lA3A9 ‘A3A8 ‘A3A7 ‘A3A6 L -------A3A5 AIVI L \A3A4 ‘A3A3 ‘A3A2 ‘A3Al AlA 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Figure 6-5.
PAGE 404
AIVI Wi AlAl ti2 Figure 6-6.
PAGE 405
AIAIO I L w29 I / I , W 2 4 A4AlO \ W8 ‘W23 W8 ‘W32 (SN 3004A and above) \ AIVI A3AlO J w i 4 W23 W25 Wi6 W27 Figure 6-7.