Service Guide Agilent Technologies ESG Vector Signal Generator This guide applies to signal generator models and associated serial number prefixes listed below. Depending on your firmware revision, signal generator operation may vary from descriptions in this guide. E4438C: US4146 Part Number: E4400-90511 Printed in USA March 2002 © Copyright 2001, 2002 Agilent Technologies, Inc.
Notice The material contained in this document is provided “as is”, and is subject to being changed, without notice, in future editions. Further, to the maximum extent permitted by applicable law, Agilent disclaims all warranties, either express or implied with regard to this manual and to any of the Agilent products to which it pertains, including but not limited to the implied warranties of merchantability and fitness for a particular purpose.
Contents 1. Troubleshooting Before Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 ESD Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 Getting Started with Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 Troubleshooting Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents 508 Frac-N Loop Unlock (Option 501, 502, 503, 504) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-69 508 Frac-N Loop Unlock (Option UNJ and Option 506) . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-69 520 Sampler Unlocked (Option UNJ and Option 506) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-70 521 YO Loop Unlocked (Option UNJ and Option 506) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-71 516 Baseband Generator Unlock . . . . . . . . . . . . . .
Contents RF Path Block Description for Option 501, 502, 503, 504 . . . . . . . . . . . . . . . . . . . . . . . . .1-122 Analog Modulation Block Description for All Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-125 Digital Modulation Block Description for All Options. . . . . . . . . . . . . . . . . . . . . . . . . . . .1-128 Block Descriptions for Option UNJ and Option 506 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 A1 Keyboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8 Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-24 A10 I/Q Multiplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26 Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents A19 Daughterboard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44 Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44 Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents A26 Rear Panel LVDS Board (Option 1EM) and A27 Rear Panel SMB Board (Option 1EM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-61 Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-61 Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-61 Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . .
Contents Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-77 Removal Procedure for Option 1EM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-77 Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-78 3. Replaceable Parts Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents includes the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) or the AT1 High-Power Mechanical Attenuator (Option UNB) with the A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) . . . .3-35 Cables for Option UNJ Signal Generators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-37 Option UNJ - Overall Cables (also includes cables for Option UN7, 005, and 001 or 002) . . . . . . . . . . . . . . . . . . . . . . . .
Contents Hardware of the Rear-Panel (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) . . . . . . . . . . . . . . . . 3-77 Hardware of the Rear-Panel (Option 1EM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-79 Hardware of a Disassembled AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) . . . . . . . . . . . . . .
1 Troubleshooting 1- 1
Troubleshooting Before Troubleshooting Before Troubleshooting WARNING These troubleshooting instructions are for use by qualified personal only. To avoid electrical shock, do not perform any troubleshooting unless qualified. WARNING The opening of covers or removal of parts is likely to expose dangerous voltages. Disconnect the signal generator from all voltage sources before it is opened.
Troubleshooting Getting Started with Troubleshooting Getting Started with Troubleshooting Determine the starting point in Table 1-1 to begin troubleshooting. • Problems should be worked on in the order they are presented in this table. • Overviews of Self-Test, Frequency Synthesis, RF Path, Analog Modulation, and Digital Modulation are found in this chapter. The information in these overviews may help the reader better understand how the signal generator operates and the function of each assembly.
Troubleshooting Getting Started with Troubleshooting ILT-1 Power Supply Failure and Self-Test When the signal generator appears to be dead (no display or fan) there is often little evidence that points directly to the cause. This section provides steps and solutions to typical failure modes. CAUTION Immediately unplug the signal generator from the ac power line if the unit shows any of the following symptoms: • Smoke, arcing, or unusual noise from inside the signal generator.
Troubleshooting Getting Started with Troubleshooting ILT-2 A12 CPU Power-On Test A12 CPU Power-On Test At power-on, the A12 CPU is designed to complete a series of operational checks. If all power supply voltages are present and the A12 CPU is working correctly, the operational checks are completed. Errors are reported if the A12 CPU has problems identifying other assemblies.
Troubleshooting Getting Started with Troubleshooting Figure 1-1 LEDs DS18 through DS25 of the A12 CPU Table 1-3 Power Supply Voltage (Vdc) 1-6 Connector Pins on the A12 CPU Minimum Value (Vdc) Maximum Value (Vdc) A23 Motherboard LED on top-right corner of A12 CPU +15 J8-103 J15-103 +14.1 +15.9 DS22 −15 J8-43 J15-43 −15.9 −14.1 DS19 +32 J8-44 J15-44 +31.04 +32.96 DS23 +5.2 J7-59, 60, 119, 120 J5-59, 60, 119, 120 +4.68 +5.72 DS25 +3.
Troubleshooting Getting Started with Troubleshooting Verifying the A12 CPU Power-On Sequence 1. Before verifying the power-on sequence, ensure that all eight DIP switches of S1 are in the CLOSED (up) position. (Refer to Figure 1-2 and locate S1 in the upper left-hand corner of the A12 CPU.) 2. Verify the A12 CPU power-on sequence by observing DS1 through DS8. When the power-on sequence is complete, DS1 through DS7 should be on and DS8 should be off.
Troubleshooting Getting Started with Troubleshooting No LAN Activity The signal generator supports 10-Base T-LAN. When the instrument is connected to an active LAN, a green LED (DS16) should blink on the A12 CPU; the blinking LED represents data communication over the LAN. (Refer to Figure 1-2 and locate DS16 in the upper middle of the A12 CPU.) No Instrument Control From the Front Panel Refer to ILT3 Front Panel Display Troubleshooting on page 1-9.
Troubleshooting Getting Started with Troubleshooting ILT3 Front Panel Display Troubleshooting The Front Panel Display consists of the following four assemblies: • A1 Keyboard • A2 Display (640 x 320 pixel liquid crystal display) • A3 Front Panel Auxilary Board • A4 Inverter The A1 Keyboard contains the front panel hardkeys and softkeys, the power on/off switch along with the standby LED, and the power-on LED.
Troubleshooting Getting Started with Troubleshooting Symptom: If the Display is Dark The control lines for the A4 Inverter are routed from the A12 CPU through the A23 Motherboard and the A3 Front Panel Auxilary Board to the A4 CN1 connector. The +5.2 Vdc is routed from the A6 Power Supply through the A23 Motherboard and the A3 Front Panel Auxilary Board to the CN1 connector of the A4 Inverter. Figure 1-3 A4 Inverter Connections ❏ Check that the screen saver is not on.
Troubleshooting Getting Started with Troubleshooting ❏ Check that there is approximately 290 Vac, 40 kHz signal at CN2-1. (This check should be made with the A4 Inverter connected to the A2 Display.) — If the signal is present at the A4 Inverter output, replace the A2 Display. (Refer to “A2 Display” on page 2-10.) — If the signal is not present at CN2, use a DVM to measure the signals shown in Table 1-4 at CN1 on the A4 Inverter.
Troubleshooting Getting Started with Troubleshooting Symptom: If the Display is Bright, but without Characters ❏ Check that the signal generator is powered-on and the front panel green LED is lit. If the green LED is not lit, refer to the Power Supply Troubleshooting section in this manual. Press any front panel key to disable the screen saver. — If the green LED is lit and the display is too bright, try adjusting the contrast controls on the front panel.
Troubleshooting Getting Started with Troubleshooting Figure 1-4 Pulsing Activity LCD_DATA J1-8 to 15, J30-13, 14, 17, 18, 23, 24, 27, 28, J15-24, 25, 28, 29, 32, 33, 86, 90 Figure 1-5 Pulsing Activity LCD_CLK J1-3, J30-4, J15-94 Figure 1-6 Pulsing Activity J1-2, J30-8, J15-36 1- 13
Troubleshooting Getting Started with Troubleshooting Figure 1-7 Pulsing Activity J1-1, J30-7, J15-93 — If the signals in Table 1-7 are correct, replace the A3 Front Panel Auxilary Board. (Refer to “A3 Front Panel Auxilary Board” on page 2-14.) — If any of the signals are incorrect, use an oscilloscope to check J15 on the A23 Motherboard for signals shown in Table 1-8.
Troubleshooting Getting Started with Troubleshooting Symptom: If Hardkeys or Softkeys are Not Functioning The A1 Keyboard contains the switches for the hardkeys and softkeys. These hardkeys and softkeys are arranged in a matrix, as shown in Table 1-9, with the control lines KEYCOLx and KEYROWy on the x and y-axis. When a hardkey or softkey is pressed, one cell of the matrix is activated.
Troubleshooting Getting Started with Troubleshooting Table 1-9 A1 Keyboard Control Lines (KEYCOLx and KEYROWy) KEYCOL0 J32-1 KEYCOL1 J32-3 KEYCOL2 J32-5 KEYCOL3 J32-7 KEYCOL4 J32-9 KEYCOL5 J32-11 KEYCOL6 J32-13 KEYCOL7 J32-15 KEYROW0 J32-17 Softkey 3 NA Cont Up NA NA Mode Menu Mode Sel NA KEYROW1 J32-19 Softkey 2 Incr/Set Cont Down Ampl Ampl Menu AM Pulse Utility KEYROW2 J32-21 Softkey 1 Up NA Freq Freq Menu FM/ΦM Dig Mod Cal KEYROW3 J32-23 Softkey 4 NA NA Right Arro
Troubleshooting Getting Started with Troubleshooting Symptom: If the RPG Knob is Not Functioning When the RPG Knob is functioning properly, DS11 on the A12 CPU should blink each time that the RPG knob is rotated. Figure 1-10 Blinking of DS11 Indicates RPG Knob Activity • Ensure that the signal generator is powered-on and that the front panel green LED is lit. — If the green LED is lit and the RPG knob is not functioning: a. Check J32-12 for +5.2 VD_LCD. — If the voltage is present on J32-12: a.
Troubleshooting Getting Started with Troubleshooting Symptom: If the Screen Saver is Not Functioning The screen saver delay may be set for any integer from 1 to 12 hours. The A12 CPU controls the screen saver by pulling the LIGHT_EN line low. • Ensure that the signal generator is powered-on and that the front panel green LED is lit. — If the green LED is lit, the delay time has elapsed, and the display hasn’t gone dark: a. Check the LIGHT_EN signal at J30-20. (Refer to Figure 1-11.
Troubleshooting Self-Test Failures and Related Troubleshooting Self-Test Failures and Related Troubleshooting Overview The philosophy behind self-test is, “It is better to pass a defective signal generator than to fail a good signal generator.” Self- Test is designed as a diagnostic tool used to check signal generator hardware. Self-tests do not require the signal generator to be calibrated before self-tests will pass.
Troubleshooting Self-Test Failures and Related Troubleshooting To Run Self-Test 1. Press the Utility key. 2. Press the Instrument Info/Help Mode softkey. 3. Press the Self Test softkey. 4. Press the Run Complete Self Test softkey. This following section has a two column table: one column has a list of self-test errors while the second column points to the section that describes assembly level troubleshooting procedures related to the self test.
Troubleshooting Self-Test Failures and Related Troubleshooting Table 1-11 Self-Test Failures and Related Troubleshooting If the following self-test fails... Go to this assembly troubleshooting section...
Troubleshooting Self-Test Failures and Related Troubleshooting Table 1-11 Self-Test Failures and Related Troubleshooting If the following self-test fails... Go to this assembly troubleshooting section...
Troubleshooting Troubleshooting Assembly Level Problems Troubleshooting Assembly Level Problems WARNING Wait 30 seconds after unplugging the instrument to allow the power supplies to discharge before removing or installing any assemblies. Power Supplies The power supply is a switching supply that has an automatic line-voltage and frequency selection. There are no switches to change for 115 Vac or 240 Vac operation. The power line fuse is not replaceable.
Troubleshooting Troubleshooting Assembly Level Problems Table 1-12 A23 Motherboard test points for: +32 +15 MB LED +12.5ab MB LED -12.5 ab +9 VFc +5.2 VA c MB LED +5.2 VD ac Filtered +9 Filtered +5.
Troubleshooting Troubleshooting Assembly Level Problems Table 1-13 A23 Motherboard test points for: MB LED +3.4 VDFa MB LED +2.6 VD_1 ab MB LED +2.6 VD_2 ab Self-Test Node +1.8 VD_1 bc Self-Test Node +1.8 VD_2 bc Self-Test Node +1.95 VD_1 bc Self-Test Node +1.
Troubleshooting Troubleshooting Assembly Level Problems Table 1-14 A23 Motherboard test points for: MB LED -6 VFab -15 VF b MB LED -5.2 VF Filtered -6 Filtered -15 ab +15 STBY Filtered -5.2 +15 STBY LCDc +5.2 VD Filtered +15.2 STBY Filtered +5.2 VD A2 Display J32-12 A3 Front Panel Auxilary Board A6 Power Supply b LCD Fan +8.
Troubleshooting Troubleshooting Assembly Level Problems Table 1-15 A23 Motherboard test points for: +32 VYa a +15 VY +5.2 VY a Filtered +32 VF Filtered +15 VF A20 Downconverter (Option 501, 502, 503, 504 with Option 300) J26-14 J26-13 J26-12 A21 YTO Driver (Option UNJ or Option 506) J34-55, 57 J34-54, 56 J34-51 Filtered +5.2 VA +3.4 VDY a +5.2 VDY a a a -15 VY -5.2 VY Filtered +3.4 VDF Filtered +5.2 VD Filtered -15 VF Filtered -5.
Troubleshooting Troubleshooting Assembly Level Problems If the Amber Standby LED is Not Working With the power turned off and the signal generator plugged in, the front panel amber standby LED should be on. The amber Standby LED is controlled by a +15 Vdc standby line supplied by the power supply, which is routed through the A23 Motherboard to the front panel. To troubleshoot the +15 Vdc Standby line, turn the signal generator off and follow the signal path.
Troubleshooting Troubleshooting Assembly Level Problems not on or the measured voltage is less than the acceptable value, one of the assemblies may be loading down the power supply. To find where each power supply is being used, refer to Table 1-12, Table 1-13, Table 1-14, and Table 1-15. To troubleshoot and isolate a defective assembly, turn power off to the signal generator and remove one of the assemblies being biased by the faulty power supply.
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 1xx for the A10 I/Q Multiplexer NOTE These self-test errors apply to the A10 I/Q Multiplexer (Option 506) and the A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ). Figure 1-12 Table 1-17 Power Supply Voltage (Vdc) 1-30 Connector Pins on the Minimum Value (Vdc) Maximum Value (Vdc) Origin A23 Motherboa rd +15 J13-28 14.55 15.45 Main Supply −15 J13-3 −15.45 −14.55 Main Supply +5.2 J13-2, 27 5.044 5.
Troubleshooting Troubleshooting Assembly Level Problems 100 Power Supply • If the power supply voltages are good on the connector pins indicated: a. Remove the A10 I/Q Multiplexer and ohm the connection between the appropriate pins of J3/J13 (A23 Motherboard side) and sockets of J3/J13 (A10 I/Q Multiplexer side). b. If the connection is good, replace the A10 I/Q Multiplexer. (Refer to “A10 I/Q Multiplexer” on page 2-26.) c. If the connection is bad, replace the A23 Motherboard.
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 2xx for the A15 Sampler (Option UNJ or Option 506) Figure 1-13 Table 1-18 1-32 Power Supply Voltage (Vdc) Connector Pins on the Minimum Value (Vdc) Maximum Value (Vdc) Origin A19 Daughterboard A23 Motherboard +32 J32-7 J10-83 +31.04 +32.96 Main Supply +15 J32-6, 21 J10-32, 82 +14.1 +15.9 Main Supply −15 J32-2, 17 J10-36, 86 −15.9 −14.1 Main Supply +9 J32-5, 20 J10-34, 84 +8.73 +9.27 Main Supply +5.
Troubleshooting Troubleshooting Assembly Level Problems 200 Power Supply • If the supply voltages are good on the J10 connector pins indicated: a. Turn power off to the signal generator. b. Remove the A15 Sampler (Option UNJ or Option 506) and ohm the connection between the appropriate J32 and J10 pins. — If the connection is good, replace the A15 Sampler (Option UNJ or Option 506). (Refer to “A15 Sampler (Option UNJ or Option 506)” on page 2-36.) — If the connection is bad, replace the A19 Daughterboard.
Troubleshooting Troubleshooting Assembly Level Problems 203 YO Loop Detector CAUTION Do not install the A13 Output with the signal generator powered up or serious damage to the signal generator may be caused. • With the signal generator powered up, carefully remove the A15 Sampler (Option UNJ or Option 506) from the signal generator. • Set the signal generator to a frequency of 625 MHz. • Connect a semi-rigid cable-extender probe to P3 and connect a signal analyzer to the probe.
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 4xx for the A13 Output These self-test errors apply to the A13 Output (Option 501, 502, 503, 504 or Option UNJ) and A13 Output (Option UNB). NOTE Figure 1-14 Table 1-19 Power Supply Voltage (Vdc) Connector Pins on the Minimum Value (Vdc) Maximum Value (Vdc) Origin A19 Daughterboard A23 Motherboard +15 J12-6, 21 J10-32, 82 +14.1 +15.9 Main Supply −15 J12-2, 17 J10-36, 86 −15.9 −14.1 Main Supply +5.
Troubleshooting Troubleshooting Assembly Level Problems 400 Ground and PTAT Test • Using a DVM, measure the voltages on J10 (the PTAT voltage is derived from the ± 15 Vdc): — If the supply voltages are good on the J10 connector pins indicated: a. Turn off the power and remove the A13 Output. b. Ohm the connection between the appropriate pins of J12 and J10. — If the connection is good, replace the A13 Output. (Refer to “A13 Output” on page 2-32.) — If the connection is bad, replace the A19 Daughterboard.
Troubleshooting Troubleshooting Assembly Level Problems 404 Marble Test • Measure the Q signal from the A10 I/Q Multiplexer. a. Disconnect the cable from J3 of the A19 Daughterboard and connect it to a DVM. b. Set the CW frequency to 2 GHz. c. Turn on the I/Q modulation and adjust the Q offset. d. Press the following keys: — I/Q hardkey / I/Q On / I/Q Adjustments / I/Q Adjustments On / Q Offset e. Rotate the RPG and observe the DVM. The voltage should vary from approximately +0.
Troubleshooting Troubleshooting Assembly Level Problems 409 ALC Modulation Test • Replace the A13 Output. 410 Burst Modulation Test • Replace the A13 Output. 411 ALC Detector Test • Replace the A13 Output. 412 Het Band Test • Measure the 1 GHz signal from the A18 Reference. a. With the power off, remove the A13 Output and insert a ribbon cable extender into J11 of the A19 Daughterboard. b. Power on the signal generator and tune to a CW frequency of 200 MHz. c.
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 5xx for the A17 Synthesizer (Option 501, 502, 503, 504) Figure 1-15 Table 1-20 Connector Pins on the Minimum Value (Vdc) Maximum Value (Vdc) Origin J10-83 +31.04 +32.96 Main Supply J42-6, 21 J10-32, 82 +14.1 +15.9 Main Supply −15 J42-2, 17 J10-36, 86 −15.9 −14.1 Main Supply +9 J42-5, 20 J10-34, 84 +8.73 +9.27 Main Supply −6 J42-3, 18 J10-37, 87 −6.36 −5.64 Main Supply −5.2 J42-4, 19 J10-35, 85 −5.356 −5.
Troubleshooting Troubleshooting Assembly Level Problems 500 Power Supply • If the ± 15 V and +5.2 V supplies are good on the connector pins indicated: a. Turn power off, remove the A17 Synthesizer (Option 501, 502, 503, 504) and ohm the connection between the appropriate J42 and J10 pins. — If the connection is good, replace the A17 Synthesizer (Option 501, 502, 503, 504). (Refer to “A17 Synthesizer (Option 501, 502, 503, 504)” on page 2-40.) — If the connection is bad, replace the A19 Daughterboard.
Troubleshooting Troubleshooting Assembly Level Problems 503 RF Detector • If the -6 V supply is good on the connector pins indicated: a. Turn power off, remove the A17 Synthesizer (Option 501, 502, 503, 504) and ohm the connection between the appropriate J52 and J10 pins. — If the connection is good, replace the A17 Synthesizer (Option 501, 502, 503, 504). (Refer to “A17 Synthesizer (Option 501, 502, 503, 504)” on page 2-40.) — If the connection is bad, replace the A19 Daughterboard.
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 6xx for the A21 YTO Driver (Option UNJ or Option 506) Figure 1-16 Table 1-21 Power Supply Voltage (Vdc) 1-42 Connector Pins on the Minimum Value (Vdc) Maximum Value (Vdc) Origin A21 YTO Driver (Option UNJ or Option 506) A23 Motherboard +32 J1-55, 57 J34-55, 57 +31.04 +32.96 Main Supply +15 J1-54, 56 J34-54, 56 +14.1 +15.9 Main Supply −15 J1-49 J34-49 −15.9 −14.1 Main Supply −5.2 J1-50 J34-50 −5.356 −5.
Troubleshooting Troubleshooting Assembly Level Problems 600 Post Regulators • If the +5.2 VD, +3.4 VDY, and ± 15 V supplies are good on the J34 connector pins indicated: a. Remove the W27 ribbon cable from J1 of the A21 YTO Driver (Option UNJ or Option 506). b. Measure the +5.2 VD, +3.4 VDY, and ± 15 V on the appropriate pins of the W27 ribbon cable. — If the voltages are good, replace the A21 YTO Driver (Option UNJ or Option 506).
Troubleshooting Troubleshooting Assembly Level Problems 602 PLL Interface • Check for A15 Sampler (Option UNJ or Option 506) YO phase lock interference. a. Disconnect the cable from J4 of the A21 YTO Driver (Option UNJ or Option 506). — If test 602 still fails, replace the A21 YTO Driver (Option UNJ or Option 506). (Refer to “A21 YTO Driver (Option UNJ or Option 506) and A22 Coupler (Option 506)” on page 2-50.) — If test 602 passes, troubleshoot the A15 Sampler (Option UNJ or Option 506).
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 7xx for the A16 Frac-N (Option UNJ or Option 506) Figure 1-17 Table 1-22 Connector Pins on the Minimum Value (Vdc) Maximum Value (Vdc) Origin J10-83 +31.04 +32.96 Main Supply J42-6, 21 J10-32, 82 +14.1 +15.9 Main Supply −15 J42-2, 17 J10-36, 86 −15.9 −14.1 Main Supply +9 J42-5, 20 J10-34, 84 +8.73 +9.27 Main Supply −6 J42-3, 18 J10-37, 87 −5.64 −6.36 Main Supply −5.2 J42-4, 19 J10-35, 85 −5.356 −5.
Troubleshooting Troubleshooting Assembly Level Problems 700 Power Supply • If the +5.2 V, +15 V, and −15 V supplies are good on the connector pins indicated: a. Turn power off to the signal generator. b. Remove the A16 Frac-N (Option UNJ or Option 506) and ohm the connection between the appropriate J42 and J10 pins. — If the connection is good, replace the A16 Frac-N (Option UNJ or Option 506). (Refer to “A16 Frac-N (Option UNJ or Option 506)” on page 2-38.
Troubleshooting Troubleshooting Assembly Level Problems — If the supply voltage is bad at the origin, troubleshoot the problem using that assembly's troubleshooting procedure. 703 Output Voltage • Replace the A16 Frac-N (Option UNJ or Option 506). 704 Filter Test • If the -6 V supply is good on the connector pins indicated: a. Turn power off to the signal generator. b. Remove the A16 Frac-N (Option UNJ or Option 506) and ohm the connection between the appropriate J42 and J10 pins.
Troubleshooting Troubleshooting Assembly Level Problems — If these signals are bad, carefully remove the A16 Frac-N (Option UNJ or Option 506) with the power on. a. Connect a semi-rigid cable-extender probe to P1 and connect a signal analyzer to the probe; P1 delivers the YO input of the A16 Frac-N (Option UNJ or Option 506) through W38.
Troubleshooting Troubleshooting Assembly Level Problems 706 FM Path Test • Measure the FM modulation signal from the A18 Reference. a. Turn power off to the signal generator. b. Remove the A16 Frac-N (Option UNJ or Option 506) and insert a ribbon cable extender1 into J41 of the A19 Daughterboard. c. Turn power on to the signal generator. d. Select the FM/ϕM menu. e.
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 8xx for the A18 Reference These self-tests apply to the A18 Reference (Option 501, 502, 503, 504), A18 Reference (Option 501, 502, 503, 504 with Option 1E5), and A18 Reference (Option UNJ or Option 506). NOTE Figure 1-18 Table 1-25 1-50 Connector Pins on the Minimum Value (Vdc) Maximum Value (Vdc) Origin J10-83 +31.04 +32.96 Main Supply J52-6, 21 J10-32, 82 +14.1 +15.9 Main Supply −15 J52-2, 17 J10-36, 86 −15.9 −14.
Troubleshooting Troubleshooting Assembly Level Problems 800 1 GHz Detector • Replace the A18 Reference. 801 Tuning Voltage • If the supply voltages are good on the J10 connector pins indicated: a. Turn power off to the signal generator. b. Remove the A18 Reference and ohm the connection between the appropriate J52 and J10 pins. — If the connection is good, replace the A18 Reference. (Refer to “A18 Reference” on page 2-42.) — If the connection is bad, replace the A19 Daughterboard.
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 11xx for the A12 CPU Figure 1-19 Table 1-26 Power Supply Voltage (Vdc) 1-52 Connector Pins on the Minimum Value (Vdc) Maximum Value (Vdc) Origin A12 CPU A23 Motherboard +32 J8-44 J15-44 +31.04 +32.96 Main Supply +15 J8-103 J15-103 +14.55 +15.45 Main Supply −15 J8-43 J15-43 −15.45 −14.55 Main Supply +9 J8-58 J15-58 +8.73 +9.27 Main Supply −6 J8-57 J15-57 −6.18 −5.82 Main Supply −5.
Troubleshooting Troubleshooting Assembly Level Problems 1100 Power Supply • Run the Self-Test to verify that the A12 CPU is receiving the following power supplies: +10 V Ref, −6 V Ref, −5.2 V Ref, and the +9 V Ref. — If the power supply voltages are correct on the J15 and J5 connector pins indicated: a. Ohm the connection between the connectors J8 and J15, or J7 and J5. — If the connection is good, replace the A12 CPU. (Refer to “A12 CPU” on page 2-30.
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 14xx for the A11 Internal Bit Error Rate Analyzer (Option UN7) Figure 1-20 Table 1-27 Power Supply Voltage (Vdc) 1-54 Connector Pins on the A23 Motherboard Minimum Value (Vdc) Maximum Value (Vdc) Origin +15 J14-28 +14.55 +15.45 Main Supply −15 J14-3 −15.45 −14.55 Main Supply −5.2 J14-1, 26 −5.356 −5.044 Main Supply +5.2 VD J4-64, 65 +5.044 +5.356 Main Supply +3.4 VD J4-60, 61, 62, 63 +3.298 +3.
Troubleshooting Troubleshooting Assembly Level Problems 1400 Power Supply • If the supply voltages are good on the connector pins indicated: a. Turn power off to the signal generator. b. Remove the A11 Internal Bit Error Rate Analyzer (Option UN7) and ohm the connection between the appropriate pins of J14/J4, and sockets J14/J4. — If the connection is good, replace the A11 Internal Bit Error Rate Analyzer (Option UN7). (Refer to “A11 Internal Bit Error Rate Analyzer (Option UN7)” on page 2-28.
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 15xx for the A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300) Figure 1-21 Table 1-28 Power Supply Voltage (Vdc) 1-56 Connector Pins on the A23 Motherboard Minimum Value (Vdc) Maximum Value (Vdc) Origin +15 J12-28 +14.55 +15.45 Main Supply −15 J12-3 −15.45 −14.55 Main Supply −5.2 J12-1, 26 −5.356 −5.044 Main Supply +5.2 J12-2, 27 +5.044 +5.356 Main Supply +5.2 VD J2-64, 65 +5.044 +5.
Troubleshooting Troubleshooting Assembly Level Problems 1500 Power Supply • If the supply voltages are good on the connector pins indicated: a. Turn power off to the signal generator. b. Remove the A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300) and ohm the connection between the appropriate pins of J12/J2, and sockets J12/J2. — If the connection is good, replace the A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300).
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 16xx for the A7 Baseband Generator (Option 001 or Option 002) Figure 1-22 Table 1-29 Power Supply Voltage (Vdc) 1-58 Connector Pins on the A23 Motherboard Minimum Value (Vdc) Maximum Value (Vdc) Origin +32 J11-4 +31.04 +32.96 Main Supply +15 J11-28 +14.1 +15.9 Main Supply −15 J11-3 −15.9 −14.1 Main Supply −5.2 J11-1, 26 −5.356 −5.044 Main Supply +5.2 J11-2, 27 +4.68 +5.72 Main Supply +3.
Troubleshooting Troubleshooting Assembly Level Problems 1600 Host <-> BBB Comm • If the +3.4 VD, +2.6 VD, and +1.9 VD supply voltages are good on the connector pins indicated: a. Turn power off to the signal generator. b. Remove the A7 Baseband Generator (Option 001 or Option 002) and ohm the connection between the appropriate pins of J1, on the A23 Motherboard side, and socket J1, on the A7 Baseband Generator (Option 001 or Option 002) side.
Troubleshooting Troubleshooting Assembly Level Problems 1603 Apps2 <-> SH4 Comm • Replace the A7 Baseband Generator (Option 001 or Option 002). 1604 Fliegen <-> Apps2 Comm • Replace the A7 Baseband Generator (Option 001 or Option 002). 1605 SRAM Test • Replace the A7 Baseband Generator (Option 001 or Option 002). 1606 SDRAM Test • Replace the A7 Baseband Generator (Option 001 or Option 002). 1607 Paren <-> SH4 Comm • Replace the A7 Baseband Generator (Option 001 or Option 002).
Troubleshooting Troubleshooting Assembly Level Problems 1609 IQ DAC Output Test • Replace the A7 Baseband Generator (Option 001 or Option 002). 1610 PLL Test • Replace the A7 Baseband Generator (Option 001 or Option 002).
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 20xx for the A14 Extended Frequency Output (Option 506) Figure 1-23 Table 1-30 1-62 Connector Pins on the Minimum Value (Vdc) Maximum Value (Vdc) Origin J10-32, 82 +14.1 +15.9 Main Supply J22-2, 17 J10-36, 86 −15.9 −14.1 Main Supply +9 J22-5, 20 J10-34, 84 +8.73 +9.27 Main Supply −6 J22-3, 18 J10-37, 87 −6.36 −5.64 Main Supply −5.2 J22-4, 19 J10-35, 85 −5.356 −5.044 Main Supply +5.
Troubleshooting Troubleshooting Assembly Level Problems 2000 Ground and PTAT Test • Using a DVM, measure the voltages on J10 (the PTAT voltage is derived from the ± 15 Vdc): — If the supply voltages are good on the J10 connector pins indicated: a. Turn off the power to the signal generator. b. Remove the A14 Extended Frequency Output (Option 506). c. Ohm the connection between the appropriate pins of J22 and J10. — If the connection is good, replace the A14 Extended Frequency Output (Option 506).
Troubleshooting Troubleshooting Assembly Level Problems 2003 VBLO Test • Replace the A14 Extended Frequency Output (Option 506). 2004 Marble Test • Measure the Q signal from the A10 I/Q Multiplexer (Option 506). a. Disconnect the cable at J9 of the A19 Daughterboard and connect it to a DVM. b. Set the CW frequency to 6 GHz. c. Turn on the I/Q modulation and adjust the Q offset with the following keys: — I/Q hardkey — I/Q On — I/Q Adjustments — I/Q Adjustments On — Q Offset d.
Troubleshooting Troubleshooting Assembly Level Problems — If both the I and Q signals are good, replace the A14 Extended Frequency Output (Option 506). (Refer to “A14 Extended Frequency Output (Option 506)” on page 2-34.) 2005 Gain Adjustment Test • Replace the A14 Extended Frequency Output (Option 506). 2006 ALC Reference Test • Replace the A14 Extended Frequency Output (Option 506). 2007 ALC Modulation Test • Replace the A14 Extended Frequency Output (Option 506).
Troubleshooting Troubleshooting Assembly Level Problems Self-Tests 21xx for the A23 Motherboard Figure 1-24 Table 1-31 Power Supply Voltage (Vdc) Minimum Value (Vdc) Maximum Value (Vdc) Origin +32 J28-27 +31.04 +32.96 Main Supply +15 J28-25, 26 +14.55 +15.45 Main Supply −15 J28-23 −15.45 −14.55 Main Supply +9 J28-19, 42 +8.73 +9.27 Main Supply −6 J28-38 −6.18 −5.82 Main Supply J28-21, 40 −5.356 −5.044 Main Supply +5.2 VD J28-14, 15, 46, 47 +5.044 +5.
Troubleshooting Troubleshooting Assembly Level Problems 2100 Power Supply • If the supply voltages are good on the connector pins indicated, replace the A23 Motherboard. (Refer to “A23 Motherboard” on page 2-52.) • If the supply voltages are bad on the connector pins indicated: a. Check the origin of the supply. — If the supply voltage is good at the origin, replace the A23 Motherboard. (Refer to “A23 Motherboard” on page 2-52.
Troubleshooting Troubleshooting Unlocks Troubleshooting Unlocks The phase lock loop refers to that part of the frequency generating circuit used to maintain the phase relationship between the frequency generation loop and a reference frequency. By maintaining the phase relationship, the frequency accuracy of the signal generator is guaranteed. To maintain accuracy, the phase lock loop compares the phase of a signal from the reference assembly to the phase of the frequency loop signal.
Troubleshooting Troubleshooting Unlocks 512 Reference Unlocked A 512 Reference Unlocked message indicates a problem with the 10 MHz reference phase-lock loop on the A18 Reference. ❏ Check for and disconnect any external reference signals that are connected to the instrument. — If the unlock message goes away when the external reference signal has been disconnected, check that the external reference signal meets the specifications for an external reference.
Troubleshooting Troubleshooting Unlocks 520 Sampler Unlocked (Option UNJ and Option 506) A 520 Sampler Unlocked message indicates a problem with the Voltage Control Oscillator’s (VCO) phase-lock loop on the A15 Sampler (Option UNJ or Option 506). ❏ Run self-tests. — If self-tests fail, troubleshoot the problem reported. — If self-tests pass: 1. Turn power on to the signal generator. 2. Remove the A15 Sampler (Option UNJ or Option 506). 3.
Troubleshooting Troubleshooting Unlocks 521 YO Loop Unlocked (Option UNJ and Option 506) A 521 YO Loop Unlocked message indicates a problem with the YO phase detector on the A15 Sampler (Option UNJ or Option 506). 1. Turn power on to the signal generator. 2. Remove the A15 Sampler (Option UNJ or Option 506). 3. Set the signal generator to 525 MHz. 4.
Troubleshooting Troubleshooting Unlocks 623 Demod Unlock A 623 Demod Unlock message indicates a problem with the Voltage Control Oscillator’s (VCO) phase-lock loop on the A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300). ❏ Check the 10 MHz signal on the A23 Motherboard at J2 pins 26 and 91 using an oscilloscope. The signal period should be 100 ns with an amplitude of approximately 1.0 Vp-p or greater.
Troubleshooting Troubleshooting Unlevels and the RF Path Troubleshooting Unlevels and the RF Path Depending on the signal generator’s frequency range and option selection, there are either one or two output boards used in the RF path: • Signal generators with Option 501, 502, 503, 504, and Option UNJ contain either the: — A13 Output (Option 501, 502, 503, 504 or Option UNJ) — or the A13 Output (Option UNB) • Signal generators with Option 506 contain both the: — A13 Output (Option UNB) — and the A14 Extende
Troubleshooting Troubleshooting Unlevels and the RF Path Troubleshooting a Leveling Problem NOTE Before proceeding to troubleshoot with this section, run a full self-test and correct any reported failures and unlock problems. (Refer to “Self-Test Failures and Related Troubleshooting” on page 1-19 and “Troubleshooting Unlocks” on page 1-68.) ❏ Check the RF path power level against the values in Table 1-33.
Troubleshooting Troubleshooting Unlevels and the RF Path g. Set Start Frequency to 250 kHz h. Set Stop Frequency to 1 GHz i. Set Number of Points to 500 — Spectrum Analyzer Setup a. Set Start Frequency to 225 kHz b. Set Stop Frequency to 1.25 GHz c. Set Reference Level to +30 dBm d. Set Display to Max Hold 2. Connect the RF output of the signal generator to the spectrum analyzer. 3. Measure and record the minimum power level. 4.
Troubleshooting Troubleshooting Unlevels and the RF Path Troubleshooting the RF Path Depending on the frequency range that an unlevel is occurring, refer to one of the following: • Unleveled or Low Power for Frequencies ≥ 250 kHz and < 250 MHz on page 1-76 • Unleveled or Low Power for Frequencies ≥ 250 MHz and ≤ 4 GHz on page 1-77 • Unleveled or Low Power for Frequencies > 4 GHz and ≤ 6 GHz (Option 506 Only) on page 1-78 Unleveled or Low Power for Frequencies ≥ 250 kHz and < 250 MHz NOTE Before proceeding
Troubleshooting Troubleshooting Unlevels and the RF Path Unleveled or Low Power for Frequencies ≥ 250 MHz and ≤ 4 GHz NOTE Before proceeding to troubleshoot with this section, run a full self-test and correct any reported failures and unlock problems. (Refer to “Self-Test Failures and Related Troubleshooting” on page 1-19 and “Troubleshooting Unlocks” on page 1-68.) 1. Set the signal generator to the unleveled frequency. 2. With the signal generator powered on, carefully remove the A13 Output. 3.
Troubleshooting Troubleshooting Unlevels and the RF Path Unleveled or Low Power for Frequencies > 4 GHz and ≤ 6 GHz (Option 506 Only) NOTE Before proceeding to troubleshoot with this section, run a full self-test and correct any reported failures and unlock problems. (Refer to “Self-Test Failures and Related Troubleshooting” on page 1-19 and “Troubleshooting Unlocks” on page 1-68.) 1. Set the signal generator to the unleveled frequency. 2.
Troubleshooting Troubleshooting the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) Troubleshooting the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) The AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) has an attenuation range of 130 dB in 5 dB steps.
Troubleshooting Troubleshooting the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) Table 1-36 shows the amplitude levels and the corresponding attenuator control line voltages. The amplitude levels are chosen so that they are approximately in the center of each 5 dB switch point. Due to calibration variations, the absolute range of each 5 dB attenuation step may have to be re-established. This can be accomplished by decreasing the power setting while monitoring A23J25 pin 9.
Troubleshooting Troubleshooting the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) Table 1-36 Attenuator Control Lines and Corresponding Amplitude Levels −105 +5 0 +5 +5 0 +5 +5 −110 +5 +5 +5 +5 0 +5 +5 −115 +5 0 +5 0 +5 +5 +5 −120 +5 +5 +5 0 +5 +5 +5 −125 +5 0 +5 +5 +5 +5 +5 −130 +5 +5 +5 +5 +5 +5 +5 1- 81
Troubleshooting Troubleshooting the AT1 High-Power Mechanical Attenuator (Option UNB) Troubleshooting the AT1 High-Power Mechanical Attenuator (Option UNB) The AT1 High-Power Mechanical Attenuator (Option UNB) has an attenuation range of 130 dB in 5 dB steps. This attenuator is used to coarse-tune the power level while the Automatic Leveling Control (ALC) loop is used to fine-tune the power level; the ALC fine-tunes the power level within each 5 dB step.
Troubleshooting Troubleshooting the AT1 High-Power Mechanical Attenuator (Option UNB) NOTE Table 1-38 shows the amplitude levels and the corresponding attenuator control line voltages. The amplitude levels are chosen so that they are approximately in the center of each 5 dB switch point. Due to calibration variations, the absolute range of each 5 dB attenuation step may have to be re-established. This can be accomplished by decreasing the power setting while monitoring A23J25 pin 10.
Troubleshooting Troubleshooting the AT1 High-Power Mechanical Attenuator (Option UNB) Table 1-38 1-84 Attenuator Control Lines and Corresponding Amplitude Levels −103 +5 0 0 +5 +5 −108 0 +5 0 +5 +5 −113 +5 +5 0 +5 +5 −118 0 0 +5 +5 +5 −123 +5 0 +5 +5 +5 −128 0 +5 +5 +5 +5
Troubleshooting Troubleshooting Adjustment Problems Troubleshooting Adjustment Problems When an adjustment does not work or fails to resolve a problem and all self-tests have passed, use the following table to locate the most likely failure. Table 1-39 Troubleshooting Adjustment Problems Adjustment that is failing... Assemblies most likely causing failure... The following adjustments are listed in the order that they should be performed for proper calibration.
Troubleshooting Troubleshooting Adjustment Problems Table 1-39 Troubleshooting Adjustment Problems Adjustment that is failing... Assemblies most likely causing failure... The following adjustments are listed in the order that they should be performed for proper calibration.
Troubleshooting Troubleshooting Adjustment Problems Table 1-39 Troubleshooting Adjustment Problems Adjustment that is failing... Assemblies most likely causing failure... The following adjustments are listed in the order that they should be performed for proper calibration. Power Level Accuracy, Low Power Calibration • AT1 High-Power Mechanical Attenuator (Option UNB) • A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) Power Search Calibration • Loose or leaky RF cables.
Troubleshooting Troubleshooting Analog Bus ADC Calibration Failures Troubleshooting Analog Bus ADC Calibration Failures The Analog Bus ADC Calibration adjusts the ADC reference voltage to match the A12 CPU +10 Vdc reference.
Troubleshooting Troubleshooting Analog Bus ADC Calibration Failures Procedure for Signal Generators with Option UNJ • Run Self-Test 1100. — If Self-Test 1100 passes: a. Turn the power off to the signal generator and remove the A15 Sampler (Option UNJ or Option 506), A16 Frac-N (Option UNJ or Option 506), and A18 Reference. b. Using service software, run the Analog Bus ADC Calibration. — If the calibration passes: a. Turn the power off to the signal generator. b.
Troubleshooting Troubleshooting Analog Bus ADC Calibration Failures Procedure for Signal Generators with Option 506 • Run Self-Test 1100. — If Self-Test 1100 passes: a. Turn the power off to the signal generator and remove the A15 Sampler (Option UNJ or Option 506), A16 Frac-N (Option UNJ or Option 506), and A18 Reference. b. Using service software, run the Analog Bus ADC Calibration. — If the calibration passes: a. Turn the power off to the signal generator. b.
Troubleshooting Troubleshooting Performance Test Problems Troubleshooting Performance Test Problems 1- 91
Troubleshooting Troubleshooting Performance Test Problems Table 1-40 Troubleshooting Performance Test Problems Performance test that is failing... Action to perform... Internal AM Accuracy • Perform: This is part of the Internal AM Accuracy and Distortion performance test.
Troubleshooting Troubleshooting Performance Test Problems Table 1-40 Troubleshooting Performance Test Problems Performance test that is failing... Action to perform... Internal AM Distortion • Perform: This is part of the Internal AM Accuracy and Distortion performance test. — Internal AM Accuracy (This is part of the Internal AM Accuracy and Distortion performance test.
Troubleshooting Troubleshooting Performance Test Problems Table 1-40 Troubleshooting Performance Test Problems Performance test that is failing... Action to perform... AM Frequency Response • Perform: — Internal AM Accuracy (This is part of the Internal AM Accuracy and Distortion performance test.
Troubleshooting Troubleshooting Performance Test Problems Table 1-40 Troubleshooting Performance Test Problems Performance test that is failing... Action to perform... Residual FM (Not Used with Option UNJ or Option 506) • Perform: — No adjustments. • If failing, troubleshoot the following assemblies: — A18 Reference — A17 Synthesizer (Option 501, 502, 503, 504) Phase Noise and Residual FM (Manual Test - Option UNJ or Option 506 Only) • Perform: — No adjustments.
Troubleshooting Troubleshooting Performance Test Problems Table 1-40 Troubleshooting Performance Test Problems Performance test that is failing... Action to perform...
Troubleshooting Troubleshooting Performance Test Problems Table 1-40 Troubleshooting Performance Test Problems Performance test that is failing... Action to perform... Internal Digital Modulation Quality (Option 402 Only) • Perform: — All I/Q calibrations — I/Q Modulation Quality (Option 402 Only) • If still failing, troubleshoot the failure.
Troubleshooting Troubleshooting Performance Test Problems Table 1-40 Troubleshooting Performance Test Problems Performance test that is failing... Action to perform...
Troubleshooting Troubleshooting Performance Test Problems Table 1-40 Troubleshooting Performance Test Problems Performance test that is failing... Action to perform... CDMA Adjacent Channel Power (Not Used with Option UNB or Option 506) • Perform: Used for Option 401 Only with CDMA 2000.
Troubleshooting Troubleshooting Performance Test Problems Table 1-40 Troubleshooting Performance Test Problems Performance test that is failing... Action to perform...
Troubleshooting Troubleshooting Harmonic Spurious Troubleshooting Harmonic Spurious Harmonics are multiples of the fundamental output frequency produced by a signal generator. Specifically, the second harmonic is two times the output frequency and its amplitude is measured relative to the fundamental (carrier) output frequency’s amplitude; the power level of a harmonic is expressed as −xx dBc.
Troubleshooting Troubleshooting Harmonic Spurious To Verify Harmonic Performance at the RF Output 1. Signal Generator Settings a. Set the frequency of the signal generator to the harmonic frequency being measured. For example, when planning to measure the second harmonic of a 1 GHz signal, set the frequency of the signal generator to 2 GHz. b. Set the power level of the signal generator to +4 dBm (+7.5 dBm for Option UNB). 2. Spectrum Analyzer Settings a.
Troubleshooting Troubleshooting Harmonic Spurious To Verify Harmonic Performance at the Coherent Carrier Output 1. Signal Generator Settings a. Set the frequency of the signal generator to the fundamental frequency being measured. For example, when planning to measure the second harmonic of a 1 GHz signal (which would be 2 GHz), set the frequency of the signal generator to 1 GHz. b. Set the power level of the signal generator to +4 dBm (+7.5 dBm for Option UNB). 2. Spectrum Analyzer Settings a.
Troubleshooting Troubleshooting Non-Harmonic Spurious Troubleshooting Non-Harmonic Spurious There are many different groupings a spur can fall into. The grouping determines what assembly is most likely generating the spur. Each data point in the service software test report indicates what type of spur is tested. The procedure for troubleshooting spurs is to identify the grouping based on failing a performance test, checking for loose or broken cables or castings, and replacing the assembly.
Troubleshooting Troubleshooting Non-Harmonic Spurious Table 1-41 Sampler Spurs Option UNJ and Option 506 These spurs are generated when the sampler IF frequency, divided by two, equals a harmonic of the sampling frequency. The most likely cause is the A15 Sampler (Option UNJ or Option 506). F/2 Spurs All These spurs are exactly one half of the RF output frequency. If these spurs occur, perform the VCO Bias Potentiometer Calibration.
Troubleshooting Troubleshooting Phase Noise (Option UNJ and Option 506 Only) Troubleshooting Phase Noise (Option UNJ and Option 506 Only) Poor grounding or shielding problems in either the test environment or the measurement system can cause the phase noise measurement to fail. Physical vibration is another common cause of phase noise.
Troubleshooting Troubleshooting Pulse Modulation and LF Out Troubleshooting Pulse Modulation and LF Out The pulse waveform originates on the A23 Motherboard, is routed through the A18 Reference, and then is routed out to the A13 Output and A14 Extended Frequency Output (Option 506). When pulse modulation is switched on, the pulse waveform is used to turn on and off the burst modulator on the A13 Output and A14 Extended Frequency Output (Option 506).
Troubleshooting Troubleshooting Pulse Modulation and LF Out To Verify the Pulse Waveform at the A19 Daughterboard (All Options) 1. Turn power off to the signal generator. 2. Remove the A13 Output. 3. Install a ribbon cable extender1 into J12 on the A19 Daughterboard. J12 is a 30-pin connector and the ribbon cable extender has only 20 pins. Align the ribbon cable extender with the pins on the left side of J12.
Troubleshooting Troubleshooting Pulse Modulation and LF Out 4. Turn power on to the signal generator and configure it for pulse mode. a. Press the Pulse hardkey and the Pulse On softkey. b. Press the LF Out hardkey and the LF Out On softkey. c. Press the LF Out Amplitude softkey and use the numeric keypad to enter 5 Vp. 5. Use an oscilloscope and probe J12-23. There should be a square wave with a period of 80 us and an amplitude of approximately 5 Vpp.
Troubleshooting Troubleshooting Pulse Modulation and LF Out To Verify the Pulse Waveform at the A19 Daughterboard (Option 506 Only) 1. Turn power off to the signal generator. 2. Remove the A14 Extended Frequency Output (Option 506). 3. Install the ribbon cable extender1 into J22 on the A19 Daughterboard. J22 is a 30-pin connector and the ribbon cable extender has only 20 pins. Align the ribbon cable extender with the pins on the left side of J22.
Troubleshooting Troubleshooting Pulse Modulation and LF Out 4. Turn power on to the signal generator and configure it for pulse mode. a. Press the Pulse hardkey and the Pulse On softkey. b. Press the LF Out hardkey and the LF Out On softkey. c. Press the LF Out Amplitude softkey and use the numeric keypad to enter 5 Vp. 5. Using an oscilloscope, probe J22-23. There should be a square wave with a period of 80 us and an amplitude of approximately 5 Vpp.
Troubleshooting Troubleshooting Pulse Modulation and LF Out No Pulse Signal from LF Out To function, the internal pulse generator on the A23 Motherboard requires a 10 MHz reference signal from the A18 Reference. 1. Assure that all self-tests have passed. 2. If an external 10 MHz reference is connected to the rear panel of the signal generator, remove the connection. 3. Use an oscilloscope and probe J10-99 of the A23 Motherboard. There should be a 10 MHz sine wave with an amplitude > 1.2 Vpp.
Troubleshooting Contacting Agilent Technologies Contacting Agilent Technologies If you should have a problem with your signal generator, contact your nearest sales and service offices.
Troubleshooting Contacting Agilent Technologies Contacting Agilent Sales and Service Offices Before contacting Agilent, read the warranty printed in Chapter 5. If your signal generator is covered under a main ten ace agreement, be familiar with its terms. Sales and service offices are located around the world to provide complete support for your signal generator. To obtain servicing information, contact the nearest Agilent Sales and Service office listed in Table 1-43.
Troubleshooting Contacting Agilent Technologies Returning Your Signal Generator for Service Use the information in this section if you need to return the signal generator to Agilent Technologies. Packaging the Signal Generator 1. Use the original packaging materials or a strong shipping container that is made of double-walled, corrugated cardboard with 159 kg (350 lb.) bursting strength.
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 Block Descriptions for Option 501, 502, 503, 504 This section contains block descriptions for all of the following functional blocks in a signal generator with Option 501, 502, 503, 504: • “Overall Block Description for Option 501, 502, 503, 504” on page 1-117 • “Frequency Synthesis Block Description for Option 501, 502, 503, 504” on page 1-120 • “RF Path Block Description for Option 501, 502, 503, 504” on page 1-122 • “Analog Modulation Bloc
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 Overall Block Description for Option 501, 502, 503, 504 Overview The objective of this overall block description is to provide a functional overview of the Agilent E4438C ESG vector signal generator with Option 501, 502, 503, 504. Some of the functional blocks discussed are common to many types of instruments while others are more specific to signal generators.
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 Front Panel Hardkeys, Softkeys, and Keypad Some front panel keys are referred to as hardkeys; these keys are dedicated to specific functions. Dedicated hardkeys are used to select the most commonly used features and control the display’s contrast and intensity. Front panel keys along the display are referred to as softkeys and are used to select functions; these functions are displayed to the left of each softkey on the display.
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 made between a reference voltage and the detected voltage. If the detected and reference voltage levels agree, the modulator drive current remains constant. If the detected and reference voltage levels do not agree, the modulator drive current changes causing the RF output power to increase or decrease until the reference and detected voltages agree.
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 Frequency Synthesis Block Description for Option 501, 502, 503, 504 Overview Frequency synthesis for Option 501, 502, 503, 504 signal generators is made from portions of the following: • A18 Reference (Option 501, 502, 503, 504) or A18 Reference (Option 501, 502, 503, 504 with Option 1E5) • A17 Synthesizer (Option 501, 502, 503, 504) • A13 Output (Option 501, 502, 503, 504 or Option UNJ) or A13 Output (Option UNB) • A23 Motherboard The Freq
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 A17 Synthesizer. The VCO is capable of being tuned from 500 MHz to 1000 MHz. The tuning of the VCO begins with a 10 MHz signal from the A18 Reference. The 10 MHz reference is divided down to 5 MHz to reduce fractional spurs in the phase detector. The 5 MHz reference is then phase compared to a divided down VCO output.
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 RF Path Block Description for Option 501, 502, 503, 504 Overview The RF Path for signal generators with Option 501, 502, 503, 504 is made from portions of the following: • A18 Reference (Option 501, 502, 503, 504) or A18 Reference (Option 501, 502, 503, 504 with Option 1E5) • A17 Synthesizer (Option 501, 502, 503, 504) • A13 Output (Option 501, 502, 503, 504 or Option UNJ) or A13 Output (Option UNB) • AT1 Electronic Attenuator (Option 501, 5
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 A13 Output (Option 501, 502, 503, 504 or Option UNJ) or A13 Output (Option UNB) The functions of the A13 Output include output power leveling, A17 Synthesizer (Option 501, 502, 503, 504) pre-leveling, pulse/burst, I/Q and amplitude modulation (AM). The RF signal from the A17 Synthesizer (Option 501, 502, 503, 504) is amplified and filtered by the A13 Output.
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 may be applied to the baseband I and Q signals. The user may also perform a front panel I/Q calibration. The calibration doesn’t require any external stimulus and will minimize quadrature and gain errors. A portion of the I and Q signals are fed back to the A10 I/Q Multiplexer which minimize offset. When I/Q modulation is enabled, the pre-level bias for the A17 Synthesizer (Option 501, 502, 503, 504) is provided by the I/Q modulator.
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 Analog Modulation Block Description for All Options Overview Analog modulation for all options of signal generators is made from portions of the following: • A18 Reference (Option 501, 502, 503, 504) or A18 Reference (Option 501, 502, 503, 504 with Option 1E5) or A18 Reference (Option UNJ or Option 506) • A17 Synthesizer (Option 501, 502, 503, 504) • A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) or A10 I/Q Multiplexer (Option
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) or A10 I/Q Multiplexer (Option 506) The A10 I/Q Multiplexer supplies the Audio 1 (I) and the Audio 2 (Q) signals to the A18 Reference. These signals are either from the A7 Baseband Generator (Option 001 or Option 002) or supplied externally through the EXT IQ-IN on the front panel.
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 A18 Reference (Option 501, 502, 503, 504) or A18 Reference (Option 501, 502, 503, 504 with Option 1E5) or A18 Reference (Option UNJ or Option 506) The A18 Reference is the heart of the Analog Modulation Block and is responsible for routing all analog modulation drive input signals to the appropriate drive circuits.
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 Digital Modulation Block Description for All Options Overview Digital modulation for all options of signal generators is made from portions of two major assemblies: • A7 Baseband Generator (Option 001 or Option 002) • A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) or A10 I/Q Multiplexer (Option 506) Together, these assemblies are responsible for generating and routing the baseband signals to the I/Q modulator located on the A1
Troubleshooting Block Descriptions for Option 501, 502, 503, 504 panel where these signals can then be used to modulate external equipment. Both inverted and non-inverted signals are available at the rear panel. The A10 I/Q Multiplexer routes the main internal I and Q modulating signal into the I/Q modulator on the A13 Output which is used to modulate the main RF output.
Troubleshooting Block Descriptions for Option UNJ and Option 506 Block Descriptions for Option UNJ and Option 506 This section contains block descriptions for all of the following functional blocks in a signal generator with Option UNJ and Option 506: • “Overall Block Description for Option UNJ and Option 506” on page 1-131 • “Frequency Synthesis Block Description for Option UNJ and Option 506” on page 1-135 • “RF Path Block Description for Option UNJ or Option 506” on page 1-138 • “Analog Modulation Block
Troubleshooting Block Descriptions for Option UNJ and Option 506 Overall Block Description for Option UNJ and Option 506 Overview The objective of this overall block description is to provide a functional overview of the Agilent E4438C ESG vector signal generator with Option UNJ and Option 506. Some of the functional blocks discussed are common to many types of instruments while others are more specific to signal generators.
Troubleshooting Block Descriptions for Option UNJ and Option 506 Front Panel Hardkeys, Softkeys, and Keypad Some front panel keys are referred to as hardkeys; these keys are dedicated to specific functions. Dedicated hardkeys are used to select the most commonly used features and control the display’s contrast and intensity. Front panel keys along the display are referred to as softkeys and are used to select functions; these functions are displayed to the left of each softkey on the display.
Troubleshooting Block Descriptions for Option UNJ and Option 506 Frequency Control Frequency accuracy and stability are established with the A18 Reference (Option UNJ or Option 506), A15 Sampler (Option UNJ or Option 506), A16 Frac-N (Option UNJ or Option 506), and the A12 CPU. Frequency Generation The YIG oscillator, on the A21 YTO Driver (Option UNJ or Option 506), generates frequencies from 4 GHz to 8 GHz.
Troubleshooting Block Descriptions for Option UNJ and Option 506 which baseband signal to use and route the signal in the same manner as the external front panel I/Q signals. The I/Q signals are simultaneously routed by the A10 I/Q Multiplexer to the A18 Reference so they may be used to modulate AM, FM, and PM.
Troubleshooting Block Descriptions for Option UNJ and Option 506 Frequency Synthesis Block Description for Option UNJ and Option 506 Overview Frequency synthesis for Option UNJ and Option 506 signal generators is made from portions of the following: • A18 Reference (Option UNJ or Option 506) • A15 Sampler (Option UNJ or Option 506) • A16 Frac-N (Option UNJ or Option 506) • A21 YTO Driver (Option UNJ or Option 506) • A13 Output (Option UNJ) or A13 Output (Option UNB) • A14 Extended Frequency Output (Option
Troubleshooting Block Descriptions for Option UNJ and Option 506 The 1 GHz STW is split with one leg being divided down to 10 MHz. This signal is then phase compared to the 10 MHz OCXO with the difference driving an integrator. The integrator tunes the 1 GHz STW ensuring both reference signals are phase locked together. The other leg of the 1 GHz signal is routed to the A15 Sampler and A13 Output. A16 Frac-N (Option UNJ or Option 506) The A16 Frac-N is used to fine tune the YO on the A21 YTO Driver.
Troubleshooting Block Descriptions for Option UNJ and Option 506 back to the A15 Sampler. The other portion of the YO signal is routed through the A16 Frac-N to the A13 Output. For Option 506, the YO is coupled off of the A21 YTO Driver and routed to the A14 Extended Frequency Output. The A15 Sampler uses the YO signal to generate a fine tune voltage, which is routed back to the A21 YTO Driver. This voltage is summed with the coarse tune DAC voltage and converted to a current.
Troubleshooting Block Descriptions for Option UNJ and Option 506 RF Path Block Description for Option UNJ or Option 506 Overview The RF Path for signal generators with Option UNJ and Option 506 is made from portions of the following: • A18 Reference (Option UNJ or Option 506) • A15 Sampler (Option UNJ or Option 506) • A16 Frac-N (Option UNJ or Option 506) • A21 YTO Driver (Option UNJ or Option 506) • A13 Output (Option UNJ) or A13 Output (Option UNB) • AT1 Electronic Attenuator (Option 501, 502, 503, 504 o
Troubleshooting Block Descriptions for Option UNJ and Option 506 A16 Frac-N (Option UNJ or Option 506) The A16 Frac-N is part of the Frequency Synthesis Block and the RF path. Depending on the desired output frequency, the A16 Frac-N divides down the YO frequency. The A16 Frac-N also provides amplification and filtering for the YO signal prior to it being routed to the A13 Output. A pre-level bias voltage generated by the A13 Output is fed back to the A16 Frac-N.
Troubleshooting Block Descriptions for Option UNJ and Option 506 pin diodes are biased off and on thus providing maximum or minimum attenuation. This causes the RF signal to pulse on and off. For narrow pulse widths, the ALC is opened. To maintain power level accuracy, a Power Search routine may be used through the front panel. The Power Search routine shuts down the modulation, momentarily closes the ALC loop, and levels. The ALC is then opened up and the modulation is turned back on.
Troubleshooting Block Descriptions for Option UNJ and Option 506 The RPP circuitry prevents instrument damage when power is mistakenly applied to the instrument’s RF output. The RPP circuitry opens an RF relay when 1 Watt of energy is sensed on the RF output. Repeated high levels of reverse power degrade the performance of the RPP or completely bypass the open RF relay. The RPP may be reset through the front panel softkeys.
Troubleshooting Block Descriptions for Option UNJ and Option 506 Analog Modulation Block Description for All Options Overview Analog modulation for all options of signal generators is made from portions of the following: • A18 Reference (Option 501, 502, 503, 504) or A18 Reference (Option 501, 502, 503, 504 with Option 1E5) or A18 Reference (Option UNJ or Option 506) • A17 Synthesizer (Option 501, 502, 503, 504) • A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) or A10 I/Q Multiplexer (Option
Troubleshooting Block Descriptions for Option UNJ and Option 506 A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) or A10 I/Q Multiplexer (Option 506) The A10 I/Q Multiplexer supplies the Audio 1 (I) and the Audio 2 (Q) signals to the A18 Reference. These signals are either from the A7 Baseband Generator (Option 001 or Option 002) or supplied externally through the EXT IQ-IN on the front panel.
Troubleshooting Block Descriptions for Option UNJ and Option 506 A18 Reference (Option 501, 502, 503, 504) or A18 Reference (Option 501, 502, 503, 504 with Option 1E5) or A18 Reference (Option UNJ or Option 506) The A18 Reference is the heart of the Analog Modulation Block and is responsible for routing all analog modulation drive input signals to the appropriate drive circuits.
Troubleshooting Block Descriptions for Option UNJ and Option 506 Digital Modulation Block Description for All Options Overview Digital modulation for all options of signal generators is made from portions of two major assemblies: • A7 Baseband Generator (Option 001 or Option 002) • A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) or A10 I/Q Multiplexer (Option 506) Together, these assemblies are responsible for generating and routing the baseband signals to the I/Q modulator located on the A1
Troubleshooting Block Descriptions for Option UNJ and Option 506 panel where these signals can then be used to modulate external equipment. Both inverted and non-inverted signals are available at the rear panel. The A10 I/Q Multiplexer routes the main internal I and Q modulating signal into the I/Q modulator on the A13 Output which is used to modulate the main RF output.
Reference / Synthesis Loop AT1 A13 Output 5/10/40/20/40 A17 Synthesizer < 4 GHz In Mod FM Prelevel Detector AT1 Electronic Attenuator Het Band FM Scaling ALC Detector Divider Doubler Filter ALC VCO AT1 High-Power Mechanical Attenuator I/Q Modulator A28 Reverse Power Protection (RPP) Front Panel A18 Reference Modulation A10 1 GHz 10 MHz RF Output 250 kHz to 4 GHz Reference A23 I Input Ext 1 In QInput Ext 2 In Data LF Out Data Clk RF Out Symbol Sync A18 Ext I In AT1 From Front Panel
A18 Reference P1-5 P3-15 A17 Synthesizer Oven Cold Timer L_OVEN_COLD +2.
A13 Output H_BYPASS Het Select Latch Prelevel Detector Bypass P3-4 Prelevel Drive 4 dB Pads Pre Level Ref DAC Gain Adj.
A17 Synthesizer From A18 Reference P1-5 P3-15 10 MHz In Reference Divider (/2) FM IN Band DAC FM_INV_H FM IN Band OFFSET DAC HSIG_DEL_FM ABUS_FM P1-11 From A18 Reference P3-11 VCO Frequency Control FM In L_SIG_DEL_ENABLE SET _57 _46 _11 _23 _22 RST _57 _46 _11_23_22 FM Out of Band DAC VCO_TUNE k*V k*(dV/dt) J6 VCO_FM To A13 Output J4 500 - 1000 MHz VCO L_FM L_10MHz_PM L_1MHz_PM L_0.
A10 I/Q Multiplexer J11 Z600 Sel Latch CAL On Latch Ext Out Sellect Ext Out IQ Offset DACs Ext Out IQ Gain Latches EXT I In J7 ABUS I EXT OUT Q EXT OUT J12 ABUS 600 ABUS Cal Source I&Q EXT Q In Ext In IQ Offset DACs Cal IQ DACs J8 Path1 Sel Latches axb a b Path1 IQ Gain Latches Ext Out IQ Fine Adj DACs Sum Sw1 Latches b Sum Sw2 Latches Path2 IQ Gain Latches Fader On To Q PATH 2 IQ Pol Sel Latch b Path2 IQ Fine Adj DACs P1-8 Audio 2 (Q only) ABUS J9 (I) 4 GHz Modulator - I
Option 506 Only A14 Extended Frequency Output (Option 506) Reference / Synthesis Loop >4 GHz A21 YTO Driver ALC Detector I/Q Modulator FM FM Driver ATI High Power Mechanical Attenuator (Option UNB) ALC A29 DC Blocking Capacitor RF Output 250 kHz to 6 GHz FM Coil YIG Oscillator Main Driver Main Coil AT1 Option UNJ A13 Output 5/10/40/20/40 < 4 GHz Prelevel Detector Het Band RF Output 250 kHz to 4 GHz ALC Detector A16 Frac-N (Fine Tune) Divider and Filter FM Scaling AT1 Electronic Attenua
A18 Reference P1-5 Oven Cold Timer L_OVEN_COLD 1GHZ_VCO_ON/OFF To A21 YTO Driver 1 GHz STW From A21 YTO Driver From A13 Output P1-19 To A13 Output P1-19 P1-10 A16 Frac-N 10 MHz OCXO / TCXO H_FM_INV LTIMEBASEDAC DAC_ADDR Fine and Coarse Tune DAC J1 MOD_CONTROL 9 dB H_SD_FM 0 to 6 dB Z Unlock Detector L_SD_OFF L_1GHZ_OUT_OF_LOCK P3-17 8.
From A16 Frac-N 500 - 1000 MHz +5 dBm J6 A15 Sampler A21 YTO Driver L_YOPLL_OPEN YO_PREDAC H_PRESET_EN L YOPLL Preset FNDIV 1/P 1 - Shot 0.2 mS FN_DIV, FM MODE, & MULTR STROBE 1 - Shot 1.0 mS FM_GAIN_DAC (from YO Driver) LYOSLEW 4 1/2 YOLGAIN STROBE Mode A FM_FREQ_COMP (from FRAC-N) LFNSWP YO PLL Unlock Detector 0 to 66 by 6 dB + L_HOLD YO_UNLOCK_CTRL 14 dB J1 RF 750 MHz A 1 GHz RF From A18 Reference Mode B LO FM_MODE_A_B 0 to -2.
A13 Output H_BYPASS Het Select Latch 0-3 GHz Prelevel Drive Pre Level Ref DAC 4 dB Pads 90 A22 Coupler (Option 506) J3 YTO OUT 4-6 GHz +5 dB @ 10 MHz PRETUNE_DAC 230 Aux.
A14 Extended Frequency Output (Option 506) Output Band Select Pre Level Ref DAC 4-6 GHz ALC Mod Prelevel Drive Gain Adj.
A17 Synthesizer From A18 Reference P1-5 P3-15 10 MHz In Reference Divider (/2) FM IN Band DAC FM_INV_H FM IN Band OFFSET DAC HSIG_DEL_FM ABUS_FM P1-11 From A18 Reference P3-11 VCO Frequency Control FM In L_SIG_DEL_ENABLE SET _57 _46 _11 _23 _22 RST _57 _46 _11_23_22 FM Out of Band DAC VCO_TUNE k*V k*(dV/dt) J6 VCO_FM To A13 Output J4 500 - 1000 MHz VCO L_FM L_10MHz_PM L_1MHz_PM L_0.
A10 I/Q Multiplexer J11 Z600 Sel Latch CAL On Latch Ext Out Sellect Ext Out IQ Offset DACs Ext Out IQ Gain Latches EXT I In J7 ABUS I EXT OUT Q EXT OUT J12 ABUS 600 ABUS Cal Source I&Q EXT Q In Ext In IQ Offset DACs Cal IQ DACs J8 Path1 Sel Latches axb a b Path1 IQ Gain Latches Ext Out IQ Fine Adj DACs Sum Sw1 Latches b Sum Sw2 Latches Path2 IQ Gain Latches Fader On To Q PATH 2 IQ Pol Sel Latch b Path2 IQ Fine Adj DACs P1-8 Audio 2 (Q only) ABUS J9 (I) 4 GHz Modulator - I
2 Assembly Replacement 2- 1
Assembly Replacement Before You Replace an Assembly Before You Replace an Assembly CAUTION Many of the assemblies in this instrument are very susceptible to damage from electrostatic discharge (ESD). Perform service procedures only at a static-safe workstation and wear a grounding strap. Be sure to review the warning and caution statements described in Chapter 5, “Safety and Regulatory,” on page 5-1 prior to replacing an assembly in your signal generator.
Assembly Replacement Assemblies That You Can Replace Assemblies That You Can Replace • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • “Outer and Inner Instrument Covers” on page 2-4 “Front Panel” on page 2-6 “A1 Keyboard” on page 2-8 “A2 Display” on page 2-10 “A2DS1 Display Backlight” on page 2-12 “A3 Front Panel Auxilary Board” on page 2-14 “A4 Inverter” on page 2-16 “A5 10 GB Hard Drive (Option 005)” on page 2-18 “A6 Power Supply” on page 2-20 “A7 Baseband Generator (Option 001 or
Assembly Replacement Outer and Inner Instrument Covers Outer and Inner Instrument Covers Tools Required • T-10 driver • T-15 driver • T-20 driver Removal Procedures Removing the Outer Cover Refer to Figure 2-1 for this procedure. 1. Disconnect the power cord. 2. Using a T-20 driver, remove the two strap handles (1) by loosening the screws. 3. Using a T-15 driver, remove the center screws (3) on the four rear-panel feet (2). 4.
Assembly Replacement Outer and Inner Instrument Covers Figure 2-1 Outer and Inner Instrument Cover Removal 2- 5
Assembly Replacement Front Panel Front Panel Tools Required • T-15 driver • long-nose pliers Removal Procedure Refer to Figure 2-2 and Figure 2-3 for this procedure. 1. Disconnect the power cord. 2. Remove the covers from the signal generator. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Remove the side trims that cover the four screws (2). 4. Using a T-15 driver, remove the four screws (1) from the sides of the frame.
Assembly Replacement Front Panel Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments and performance tests that pertain to this removal procedure. 3. Torque all T-10 screws to 9 in-lbs. 4. Torque all T-15 screws to 21 in-lbs. 5. Torque all T-20 screws to 21 in-lbs.
Assembly Replacement A1 Keyboard A1 Keyboard Tools Required • T-10 driver Removal Procedure Refer to Figure 2-4 for this procedure. 1. Disconnect the power cord. 2. Remove the front panel. Refer to “Front Panel” on page 2-6. 3. Disconnect the W1 cable of the A2DS1 Display Backlight cable from the A4 Inverter. 4. If you have an A5 10 GB Hard Drive (Option 005), use the T-10 to remove the four screws (5) and lift the hard drive from the display panel’s sheet metal. 5.
Assembly Replacement A1 Keyboard Figure 2-4 A1 Keyboard 2- 9
Assembly Replacement A2 Display A2 Display Tools Required • T-10 driver Removal Procedure Refer to Figure 2-5 for this procedure. 1. Disconnect the power cord. 2. Remove the front panel. Refer to “Front Panel” on page 2-6. 3. Disconnect the W1 cable of the A2DS1 Display Backlight from the A4 Inverter. 4. If you have an A5 10 GB Hard Drive (Option 005), use the T-10 to remove the four screws (4) and lift the hard drive from the display panel’s sheet metal. 5.
Assembly Replacement A2 Display Figure 2-5 A2 Display 2- 11
Assembly Replacement A2DS1 Display Backlight A2DS1 Display Backlight Tools Required • T-10 driver • small phillips screw driver Removal Procedure Refer to Figure 2-6 for this procedure. 1. Disconnect the power cord. 2. Remove the front panel. Refer to “Front Panel” on page 2-6. 3. Disconnect the W1 cable of the A2DS1 Display Backlight from the A4 Inverter. 4.
Assembly Replacement A2DS1 Display Backlight Figure 2-6 A2DS1 Backlight 2- 13
Assembly Replacement A3 Front Panel Auxilary Board A3 Front Panel Auxilary Board Tools Required • T-10 driver WARNING High voltage is present at the A4 Inverter output (CN2-1). Also, be careful of the fan blades on B1, B2, and B3. Keep hands and fingers away from the fan blades to avoid injury! Removal Procedure Refer to Figure 2-7 for this procedure. 1. Disconnect the power cord. 2. Remove the front panel. Refer to “Front Panel” on page 2-6. 3.
Assembly Replacement A3 Front Panel Auxilary Board Figure 2-7 A3 Front Panel Auxilary Board 2- 15
Assembly Replacement A4 Inverter A4 Inverter Tools Required • T-10 driver WARNING High voltage is present at the A4 Inverter output (CN2-1). Also, be careful of the fan blades on B1, B2, and B3. Keep hands and fingers away from the fan blades to avoid injury! Removal Procedure Refer to Figure 2-8 for this procedure. 1. Disconnect the power cord. 2. Remove the front panel. Refer to “Front Panel” on page 2-6. 3. Disconnect the W1 cable (2), of the A2DS1 Display Backlight, from the A4 Inverter. 4.
Assembly Replacement A4 Inverter Figure 2-8 A4 Inverter 2- 17
Assembly Replacement A5 10 GB Hard Drive (Option 005) A5 10 GB Hard Drive (Option 005) Tools Required • T-10 driver Removal Procedure Refer to Figure 2-9 for this procedure. 1. Disconnect the power cord. 2. Remove the front panels. Refer to “Front Panel” on page 2-6. 3. Using the T-10 driver, remove the four screws (1). 4. Lift and remove the A5 10 GB Hard Drive (Option 005) from the display panel’s sheet metal. Replacement Procedure 1. Reverse the order of the removal procedure. 2.
Assembly Replacement A5 10 GB Hard Drive (Option 005) Figure 2-9 A5 10 GB Hard Drive (Option 005) 2- 19
Assembly Replacement A6 Power Supply A6 Power Supply Tools Required • T-10 driver Removal Procedure Refer to Figure 2-10 for this procedure. 1. Disconnect the power cord. 2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Using the T-10 driver, remove the three flathead screws (1) and the ten pan-head screws (2) from the A6 Power Supply’s sheet metal cover (3). 4. Disconnect the A24 Line Module cable (A24W1) from the A6 Power Supply (5). 5.
Assembly Replacement A6 Power Supply Figure 2-10 A6 Power Supply 2- 21
Assembly Replacement A7 Baseband Generator (Option 001 or Option 002) A7 Baseband Generator (Option 001 or Option 002) Tools Required • needle-nose pliers Removal Procedure Refer to Figure 2-11 for this procedure and to the connector/cable diagram located on the card cage. 1. Disconnect the power cord. 2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Disconnect the W10 ribbon cable from A7J13. 4. Using needle-nose pliers, disconnect the W12 cable from A7J800.
Assembly Replacement A7 Baseband Generator (Option 001 or Option 002) Figure 2-11 A7 Baseband Generator (Option 001 or Option 002) 2- 23
Assembly Replacement A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300) A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300) Tools Required • needle-nose pliers Removal Procedure Refer to Figure 2-12 for this procedure and to the connector/cable diagram located on the card cage. 1. Disconnect the power cord. 2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3.
Assembly Replacement A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300) Figure 2-12 A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300) 2- 25
Assembly Replacement A10 I/Q Multiplexer A10 I/Q Multiplexer NOTE This procedure applies to the A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) and A10 I/Q Multiplexer (Option 506). Tools Required • needle-nose pliers Removal Procedure Refer to Figure 2-13 for this procedure and to the connector/cable diagram located on the card cage. 1. Disconnect the power cord. 2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3.
Assembly Replacement A10 I/Q Multiplexer Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments and performance tests that pertain to this removal procedure.
Assembly Replacement A11 Internal Bit Error Rate Analyzer (Option UN7) A11 Internal Bit Error Rate Analyzer (Option UN7) Tools Required • needle-nose pliers Removal Procedure Refer to Figure 2-14 for this procedure and to the connector/cable diagram located on the card cage. 1. Disconnect the power cord. 2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Using needle-nose pliers, disconnect the following cables: • W15 cable from A10J14 (This is W77 on an Option 1EM.
Assembly Replacement A11 Internal Bit Error Rate Analyzer (Option UN7) 8. Lift out the A11 Internal Bit Error Rate Analyzer (Option UN7). Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments and performance tests that pertain to this removal procedure.
Assembly Replacement A12 CPU A12 CPU Tools Required • none Removal Procedure Refer to Figure 2-15 for this procedure and to the connector/cable diagram located on the card cage. 1. Disconnect the power cord. 2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Using needle-nose pliers, disconnect the following cables: • W15 cable from A10J14 (This is W77 on an Option 1EM.) • W16 cable from A10J13 (This is W76 on an Option 1EM.
Assembly Replacement A12 CPU 9. Lift out the A12 CPU. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments and performance tests that pertain to this removal procedure.
Assembly Replacement A13 Output A13 Output NOTE This procedure applies to both the A13 Output (Option 501, 502, 503, 504 or Option UNJ) and the A13 Output (Option UNB). Tools Required • none Removal Procedure Refer to Figure 2-16 for this procedure and to the connector/cable diagram located on the card cage. 1. Disconnect the power cord. 2. Remove the outer and inner-side covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3.
Assembly Replacement A13 Output Figure 2-16 A13 Output 2- 33
Assembly Replacement A14 Extended Frequency Output (Option 506) A14 Extended Frequency Output (Option 506) Tools Required • none Removal Procedure Refer to Figure 2-17 for this procedure and to the connector/cable diagram located on the card cage. 1. Disconnect the power cord. 2. Remove the outer and inner-side covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3.
Assembly Replacement A14 Extended Frequency Output (Option 506) Figure 2-17 A14 Extended Frequency Output (Option 506) 2- 35
Assembly Replacement A15 Sampler (Option UNJ or Option 506) A15 Sampler (Option UNJ or Option 506) Tools Required • none Removal Procedure Refer to Figure 2-18 for this procedure and to the connector/cable diagram located on the card cage. 1. Disconnect the power cord. 2. Remove the outer and inner-side covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Locate Side-SLOT 3, lift the retention levers, and disconnect the A15 Sampler (Option UNJ or Option 506) from the A19 Daughterboard. 4.
Assembly Replacement A15 Sampler (Option UNJ or Option 506) Figure 2-18 A15 Sampler (Option UNJ or Option 506) 2- 37
Assembly Replacement A16 Frac-N (Option UNJ or Option 506) A16 Frac-N (Option UNJ or Option 506) Tools Required • none Removal Procedure Refer to Figure 2-19 for this procedure and to the connector/cable diagram located on the card cage. 1. Disconnect the power cord. 2. Remove the outer and inner-side covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Locate Side-SLOT 4, lift the retention levers, and disconnect the A16 Frac-N (Option UNJ or Option 506) from the A19 Daughterboard. 4.
Assembly Replacement A16 Frac-N (Option UNJ or Option 506) Figure 2-19 A16 Frac-N (Option UNJ or Option 506) 2- 39
Assembly Replacement A17 Synthesizer (Option 501, 502, 503, 504) A17 Synthesizer (Option 501, 502, 503, 504) Tools Required • none Removal Procedure Refer to Figure 2-20 for this procedure and to the connector/cable diagram located on the card cage. 1. Disconnect the power cord. 2. Remove the outer and inner-side covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3.
Assembly Replacement A17 Synthesizer (Option 501, 502, 503, 504) Figure 2-20 A17 Synthesizer (Option 501, 502, 503, 504) 2- 41
Assembly Replacement A18 Reference A18 Reference NOTE This procedure applies to the A18 Reference (Option 501, 502, 503, 504), A18 Reference (Option 501, 502, 503, 504 with Option 1E5), and A18 Reference (Option UNJ or Option 506). Tools Required • none Removal Procedure Refer to Figure 2-21 for this procedure and to the connector/cable diagram located on the card cage. 1. Disconnect the power cord. 2. Remove the outer and inner-side covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3.
Assembly Replacement A18 Reference Figure 2-21 A18 Reference 2- 43
Assembly Replacement A19 Daughterboard A19 Daughterboard Tools Required • T-10 driver Removal Procedure Refer to Figure 2-22 for this procedure and to the connector/cable diagram located on the card cage. 1. Disconnect the power cord. 2. Remove the outer and inner-side covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. NOTE It is recommended to label the assembly boards before you remove them from the card cage for easy installation. 3.
Assembly Replacement A19 Daughterboard Figure 2-22 A19 Daughterboard 2- 45
Assembly Replacement A19 Daughterboard Cable Removal A19 Daughterboard Cable Removal Tools Required • external retaining ring pliers Removal Procedure Refer to Figure 2-23 for this procedure. 1. Disconnect the power cord. 2. Remove the outer and inner-side covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. NOTE Before removing assemblies from the card cage, it is recommended that the assembly be labelled. This will help during reassembly. 3.
Assembly Replacement A19 Daughterboard Cable Removal Figure 2-23 A19 Daughterboard Cable Removal 2- 47
Assembly Replacement A20 Downconverter (Option 501, 502, 503, 504 with Option 300) A20 Downconverter (Option 501, 502, 503, 504 with Option 300) Tools Required • T-10 driver • needle-nose pliers Removal Procedure Refer to Figure 2-24 for this procedure. 1. Disconnect the power cord. 2. Remove the outer and inner covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3.
Assembly Replacement A20 Downconverter (Option 501, 502, 503, 504 with Option 300) Figure 2-24 A20 Downconverter (Option 501, 502, 503, 504 with Option 300) 2- 49
Assembly Replacement A21 YTO Driver (Option UNJ or Option 506) and A22 Coupler (Option 506) A21 YTO Driver (Option UNJ or Option 506) and A22 Coupler (Option 506) Tools Required • T-10 driver • 5/16” open ended wrench • needle-nose pliers Removal Procedure Refer to Figure 2-25 for this procedure. 1. Disconnect the power cord. 2. Remove the outer and inner covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Disconnect the W27 ribbon cable from the A21 YTO Driver (Option UNJ or Option 506).
Assembly Replacement A21 YTO Driver (Option UNJ or Option 506) and A22 Coupler (Option 506) Replacement Procedure NOTE Make sure that the tabs on the A21 YTO Driver (Option UNJ or Option 506) hook bracket line up with the slots in the chassis. 1. Reverse the order of the removal procedure. 2. Torque all T-10 screws to 9 in-lbs. 3. Torque all RF connectors to 9 in-lbs. 4. Perform the post-repair adjustments and performance tests that pertain to this removal procedure.
Assembly Replacement A23 Motherboard A23 Motherboard Tools Required • T-10 driver • 5/8” open-ended wrench • 3/16” nut driver • 9/32” nut driver • needle-nose pliers Removal Procedure Refer to Figure 2-26 for this procedure. 1. Disconnect the power cord. 2. Remove the outer and top inner covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Remove the A6 Power Supply. Refer to “A6 Power Supply” on page 2-20. 4. Remove all of the assembly boards inserted into the A23 Motherboard.
Assembly Replacement A23 Motherboard Replacement Procedure 1. Reverse the order of the removal procedure. 2. Torque all T-10 screws to 9 in-lbs. 3. Torque all RF connectors to 9 in-lbs. 4. Torque all 5/8” nuts to 9 in-lbs. 5. Torque all 5/16” nuts to 9 in-lbs. 6. Perform the post-repair adjustments and performance tests that pertain to this removal procedure.
Assembly Replacement A23 Motherboard Figure 2-26 2-54 A23 Motherboard
Assembly Replacement A23BT1 Battery A23BT1 Battery Tools Required • none Removal Procedure Refer to Figure 2-27 for this procedure. 1. Disconnect the power cord. 2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Place the signal generator on its side so that the bottom of the signal generator is visible. 4. Remove the battery. Replacement Procedure 1.
Assembly Replacement A24 Line Module A24 Line Module Tools Required • T-10 driver Removal Procedure Refer to Figure 2-28 for this procedure. 1. Disconnect the power cord. 2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Remove the Rear Panel. Refer to “Rear Panel” on page 2-57. 4. Using a T-10 driver, remove the screw (2) that secures the A24 Line Module (1) to the Rear Panel. 5.
Assembly Replacement Rear Panel Rear Panel Tools Required • T-10 driver • 5/8” hex-nut driver • 9/32” nut driver • 3/16” nut driver • needle-nose pliers Removal Procedure Refer to Figure 2-29 for this procedure. 1. Disconnect the power cord. 2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Disconnect all cables connected to the Rear Panel. 4. Using the 9/32” nut driver, remove the nuts on the GPIB connector (1). 5.
Assembly Replacement Rear Panel Figure 2-29 2-58 Rear Panel
Assembly Replacement A25 Rear Panel Board A25 Rear Panel Board Tools Required • T-10 driver • 3/16” hex-nut driver • 9/16” open-ended wrench • 5 mm nut driver • small phillips screw driver Removal Procedure Refer to Figure 2-30 for this procedure. 1. Disconnect the power cord. 2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Disconnect W10 from the A25 Rear Panel Board. 4. Disconnect W32 from the A25 Rear Panel Board. 5.
Assembly Replacement A25 Rear Panel Board Figure 2-30 2-60 A25 Rear Panel Board
Assembly Replacement A26 Rear Panel LVDS Board (Option 1EM) and A27 Rear Panel SMB Board (Option 1EM) A26 Rear Panel LVDS Board (Option 1EM) and A27 Rear Panel SMB Board (Option 1EM) Tools Required • T-10 driver • 5/8” hex-nut driver • 3/16” hex-nut driver • 9/16” open-ended wrench • 5 mm nut driver • needle-nose pliers Removal Procedure Refer to Figure 2-31 for this procedure. 1. Disconnect the power cord. 2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3.
Assembly Replacement A26 Rear Panel LVDS Board (Option 1EM) and A27 Rear Panel SMB Board (Option 1EM) Figure 2-31 2-62 A26 Rear Panel LVDS Board (Option 1EM) and A27 Rear Panel SMB Board (Option 1EM)
Assembly Replacement AT1 High-Power Mechanical Attenuator (Option UNB) with A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) AT1 High-Power Mechanical Attenuator (Option UNB) with A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-32 for this procedure. 1. Disconnect the power cord. 2. Remove the outer and top inner cover.
Assembly Replacement AT1 High-Power Mechanical Attenuator (Option UNB) with A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) Replacement Procedure 1. Reverse the order of the removal procedure. 2. Torque all T-10 screws to 9 in-lbs. 3. Torque all RF cables to 9 in-lbs. 4. Perform the post-repair adjustments and performance tests that pertain to this removal procedure.
Assembly Replacement AT1 High-Power Mechanical Attenuator (Option UNB) AT1 High-Power Mechanical Attenuator (Option UNB) On signal generators equipped with an RPP, refer to “AT1 High-Power Mechanical Attenuator (Option UNB) with A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ)” on page 2-63 for removal instructions. The following procedure is primarily for Option 506.
Assembly Replacement AT1 High-Power Mechanical Attenuator (Option UNB) 3. Torque all RF connectors to 8 in-lbs. 4. Perform the post-repair adjustments and performance tests that pertain to this removal procedure.
Assembly Replacement AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) Tools Required • T-10 driver • 5/16” open ended wrench Removal Procedure Refer to Figure 2-34 for this procedure. 1. Disconnect the power cord. 2. Remove the outer and inner covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3.
Assembly Replacement AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) Figure 2-34 2-68 AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ)
Assembly Replacement A29 DC Blocking Capacitor (Option 506) A29 DC Blocking Capacitor (Option 506) Tools Required • 5/16” open ended wrench Removal Procedure Refer to Figure 2-35 for this procedure. 1. Disconnect the power cord. 2. Remove the outer and top inner cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Remove the front panel. Refer to “Front Panel” on page 2-6. 4. Using the 5/16” open ended wrench, disconnect W59 from the A29 DC Blocking Capacitor (Option 506). 5.
Assembly Replacement A29 DC Blocking Capacitor (Option 506) Figure 2-35 A29 DC Blocking Capacitor (Option 506) Figure 2-36 A29 DC Blocking Capacitor (Option 506) for Option 1EM 2-70
Assembly Replacement B1 Power Supply Fan B1 Power Supply Fan Tools Required • T-10 driver Removal Procedure Refer to Figure 2-37 for this procedure. 1. Disconnect the power cord. 2. Remove the outer cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Remove the front panel. Refer to “Front Panel” on page 2-6. 4. Remove the four screws (1) that attach the B1 Power Supply Fan to the chassis using a T-10 driver. 5. Disconnect the B1W1 fan cable from the A23J33. 6.
Assembly Replacement B1 Power Supply Fan Figure 2-37 2-72 B1 Power Supply Fan
Assembly Replacement B2 Small Fan B2 Small Fan Tools Required • T-10 driver Removal Procedure Refer to Figure 2-38 for this procedure. 1. Disconnect the power cord. 2. Remove the outer and inner covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Remove the front panel. Refer to “Front Panel” on page 2-6. 4. Remove the four screws (2) that attach the B2 Small Fan to the chassis using a T-10 driver. 5. Disconnect the B2W1 fan cable from the A23J27. 6. Remove the B2 Small Fan.
Assembly Replacement B2 Small Fan Figure 2-38 2-74 B2 Small Fan
Assembly Replacement B3 Daughterboard/Card Cage Fan B3 Daughterboard/Card Cage Fan Tools Required • T-10 driver Removal Procedure Refer to Figure 2-39 for this procedure. 1. Disconnect the power cord. 2. Remove the outer and inner covers. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Remove the front panel. Refer to “Front Panel” on page 2-6. 4. Remove the four screws (3) that attached the B3 Daughterboard/Card Cage Fan to the chassis using a T-10 driver. 5.
Assembly Replacement B3 Daughterboard/Card Cage Fan Figure 2-39 2-76 B3 Daughterboard/Card Cage Fan
Assembly Replacement RF Output Connector RF Output Connector Tools Required • 5/16” open ended wrench • 9/16” open ended wrench • T-10 driver Removal Procedure Refer to Figure 2-40 and Figure 3-28 for this procedure. 1. Disconnect the power cord. 2. Remove the outer and top inner cover. Refer to “Outer and Inner Instrument Covers” on page 2-4. 3. Remove the front panel. Refer to “Front Panel” on page 2-6. 4.
Assembly Replacement RF Output Connector 5. Using the T-10 driver, remove the two screws (1) that hold the RF Output Connector and bracket to the chassis. 6. Using the 9/16” open ended wrench, remove the nut and washer holding the RF Output Connector to the bracket (2); the bracket does not need to be replaced. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Torque all RF cables to 9 in-lbs. 3.
Assembly Replacement RF Output Connector Figure 2-41 RF Output Connector for Option 1EM 2- 79
Assembly Replacement RF Output Connector 2-80
3 Replaceable Parts 3- 1
Replaceable Parts Ordering Information Ordering Information To order a part, do the following: 1. Determine the part number. 2. Determine the quantity required. 3. Mail this information to the nearest Agilent Technologies office or, in the U.S., call the hot-line number listed in the following section.
Replaceable Parts Save Money with Rebuilt-Exchange Assemblies Save Money with Rebuilt-Exchange Assemblies Under the rebuilt-exchange assembly program, certain factory-repaired and tested assemblies are available on a trade-in basis. These assemblies cost less than a new assembly and meet all factory specifications required of a new assembly. The defective assembly must be returned for credit under the terms of the rebuilt-exchange assembly program.
Replaceable Parts Shipping a Defective Assembly Back to Agilent Technologies Shipping a Defective Assembly Back to Agilent Technologies 1. When you receive the rebuilt assembly, be careful not to damage the box in which it was shipped. You will use that box to return the defective assembly. The box you receive should contain the following: • the rebuilt assembly • an exchange assembly failure report • a return address label 2. Complete the failure report. 3.
Replaceable Parts Frequency, Hardware, and Personality Options Frequency, Hardware, and Personality Options This section lists the options available with the Agilent E4438C ESG Vector Signal Generator.
Replaceable Parts Assemblies and Hardware Options Assemblies and Hardware Options Assembly Option 501, 502, 503, 504 and Option 300 Option UNJ Option 506 E4400-60502 E4400-60502 E4400-60502 A2 Display page 3-14 2090-0375 2090-0375 2090-0375 A2DS1 Display Backlight page 3-14 1513-5204 1513-5204 1513-5204 E4400-60503 E4400-60503 E4400-60503 A4 Inverter page 3-14 0950-3757 0950-3757 0950-3757 A5 10 GB Hard Drive (Option 005) page 3-14 0950-4166 0950-4166 0950-4166 A6 Power Supply pag
Replaceable Parts Assemblies and Hardware Options Assembly Option 501, 502, 503, 504 and Option 300 Option UNJ Option 506 Side-SLOT 5 A18 Reference (Option 501, 502, 503, 504) page 3-12 E4400-60512 N/A N/A or A18 Reference (Option 501, 502, 503, 504 with Option 1E5) page 3-12 E4400-60513 N/A N/A N/A E4423-60500 E4423-60500 A19 Daughterboard page 3-12 E4400-60719 E4400-60719 E4400-60719 A20 Downconverter (Option 501, 502, 503, 504 with Option 300) page 3-8 E4400-60544 N/A N/A A21 YTO
Replaceable Parts Assemblies from a Top View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Assemblies from a Top View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Assembly Option 501, 502, 503, 504 and Option 300 Option UNJ Option 506 0950-4031 0950-4031 0950-4031 E4400-60539 E4400-60539 E4400-60539 or A7 Baseband Generator (Option 002) E4400-60501 E4400-60501 E4400-60501 Top-SLOT 2 A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300)
Replaceable Parts Assemblies from a Top View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Figure 3-2 Assemblies from a Top View (Option 501, 502, 503, 504 or Option 300) 3- 9
Replaceable Parts Assemblies from a Top View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Figure 3-3 3-10 Assemblies from a Top View (Option UNJ)
Replaceable Parts Assemblies from a Top View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Figure 3-4 Assemblies from a Top View (Option 506) 3- 11
Replaceable Parts Assemblies from a Right-Side View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Assemblies from a Right-Side View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Assembly Option 501, 502, 503, 504 and Option 300 Option UNJ Option 506 E4400-60505 E4400-60505 N/A E4400-60514 E4400-60514 E4400-60514 also requires Side-SLOT 2 N/A N/A E4400-60718 N/A E8251-60043 E8251-60043 N/A E8251-60044 E8251-60044 or A17 Synthesizer (Option 501, 50
Replaceable Parts Assemblies from a Right-Side View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Figure 3-5 Assemblies from a Right-Side View (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) 3- 13
Replaceable Parts Assemblies of the Front Panel (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Assemblies of the Front Panel (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Table 3-1 Option 501, 502, 503, 504 and Option 300 Option UNJ Option 506 E4400-60502 E4400-60502 E4400-60502 A2 Display 2090-0375 2090-0375 2090-0375 A2DS1 Display Backlight 1513-5204 1513-5204 1513-5204 E4400-60503 E4400-60503 E4400-60503 A4 Inverter 0950-3757 0950-3757 0950-37
Replaceable Parts Assemblies of the Inside Rear Panel (Option 501, 502, 503, 504, Option 300, Option UNJ, Option 506, or Option 1EM) Assemblies of the Inside Rear Panel (Option 501, 502, 503, 504, Option 300, Option UNJ, Option 506, or Option 1EM) Table 3-2 Option 501, 502, 503, 504 and Option 300 Option UNJ Option 506 A24 Line Module page 3-15 E4400-60537 E4400-60537 E4400-60537 A25 Rear Panel Board page 3-15 E4400-60506 E4400-60506 E4400-60506 or A26 Rear Panel LVDS Board (Option 1EM) and A27
Replaceable Parts A23BT1 Battery (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) A23BT1 Battery (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Table 3-3 Assembly A23BT1 Battery Figure 3-8 3-16 Option 501, 502, 503, 504 and Option 300 Option UNJ Option 506 1420-0356 1420-0356 1420-0356 A23BT1 Battery (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506)
Replaceable Parts Cables Cables This section lists part numbers for the cables in your signal generator.
Replaceable Parts Cables • Option 506 Cables — “Option 506 - Overall Cables (also includes cables for Option UN7, 005, and 001 or 002)” on page 3-55 — “Option 506 - Front Panel Cables” on page 3-58 — “Option 506 - Standard Cables (does not include cables for the front panel, Option UN7, or Option 005)” on page 3-60 — “Option 506 - Only Option UN7, 005, and 001 or 002 Cables” on page 3-63 — “Option 506 - Semi-Rigid Cables includes the A21 YTO Driver (Option UNJ or Option 506) and the AT1 High-Power Mechanic
Replaceable Parts Cables for the Inside Front Panel and Fans (B1, B2, and B3) Cables for the Inside Front Panel and Fans (B1, B2, and B3) Table 3-4 Reference Designator Description Part Number W1 flexible cable, I INPUT from the front panel to J7 of A10 I/Q Multiplexer 8121-0642 W2 flexible cable, Q INPUT from the front panel to J8 of A10 I/Q Multiplexer 8121-0642 W3 flexible cable, DATA from the front panel to J21 of A23 Motherboard 8121-0661 W4 flexible cable, DATA CLOCK from the front panel
Replaceable Parts Cables for the Inside Front Panel and Fans (B1, B2, and B3) Figure 3-9 3-20 Cables for the Inside Front Panel and Fans (B1, B2, and B3)
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Cables for Option 501, 502, 503, 504 Signal Generators Option 501, 502, 503, 504 - Overall Cables (also includes cables for Option UN7, 300, 005, and 001 or 002) Table 3-5 Reference Designator Description Part Number W1 flexible cable, I INPUT from the front panel to J7 of A10 I/Q Multiplexer 8121-0642 W2 flexible cable, Q INPUT from the front panel to J8 of A10 I/Q Multiplexer 8121-0642 W3 flexible cable, DATA from the fron
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Table 3-5 Reference Designator Description Part Number W18 flexible cable, J11 of A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) to I OUT of the rear panel 8121-0640 W19 flexible cable, J10 of A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) to Q IN of A19 Daughterboard - refer to the connector diagram located on the daughterboard cover 8121-0641 W20 flexible cable, J9 of A10 I/Q Multiplexer (Opti
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Figure 3-10 Option 501, 502, 503, 504 - Overall Cables (also includes cables for Option UN7, 300, 005, and 001 or 002) 3- 23
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Option 501, 502, 503, 504 - Front Panel Cables Table 3-6 Reference Designator Description Part Number W1 flexible cable, I INPUT from the front panel to J7 of A10 I/Q Multiplexer 8121-0642 W2 flexible cable, Q INPUT from the front panel to J8 of A10 I/Q Multiplexer 8121-0642 W3 flexible cable, DATA from the front panel to J21 of A23 Motherboard 8121-0661 W4 flexible cable, DATA CLOCK from the front panel to J23 of A23 Mot
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Figure 3-11 Option 501, 502, 503, 504 - Front Panel Cables 3- 25
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Option 501, 502, 503, 504 - Standard Cables (does not include cables for the front panel, Option UN7, Option 300, or Option 005) Table 3-7 Reference Designator Description Part Number W10 ribbon cable, J13 of A7 Baseband Generator (Option 001 or Option 002) to J3 of A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300) to J3 of A11 Internal Bit Error Rate Analyzer (Option UN7) to P2 of A25 Rear Panel Board 8121-0679
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Figure 3-12 Option 501, 502, 503, 504 - Standard Cables (does not include cables for the front panel, Option UN7, Option 300, or Option 005) 3- 27
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Option 501, 502, 503, 504 - Only Option UN7, 300, 005, and 001 or 002 Cables Table 3-8 Reference Designator Description Part Number W10 ribbon cable, J13 of A7 Baseband Generator (Option 001 or Option 002) to J3 of A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300) to J3 of A11 Internal Bit Error Rate Analyzer (Option UN7) to P2 of A25 Rear Panel Board 8121-0679 W12 (Option 001 or 002) flexible cable, J800 of A7
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Figure 3-13 Option 501, 502, 503, 504 - Only Option UN7, 300, 005, and 001 or 002 Cables 3- 29
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Option 501, 502, 503, 504 - Semi-Rigid Cables includes the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) or the AT1 High-Power Mechanical Attenuator (Option UNB) with the A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) Table 3-9 Reference Designator Description Part Number W9 semi-rigid cable, output of AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) to front panel R
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Figure 3-14 Option 501, 502, 503, 504 - Semi-Rigid Cables includes the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) or the AT1 High-Power Mechanical Attenuator (Option UNB) with A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) 3- 31
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Option 501, 502, 503, 504 - Option 1EM Overall Cables (also includes cables for Option UN7, 300, 005, and 001 or 002) Table 3-10 Reference Designator Description Part Number W10 ribbon cable, J13 of A7 Baseband Generator (Option 001 or Option 002) to J3 of A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300) to J3 of A11 Internal Bit Error Rate Analyzer (Option UN7) to P2 of A25 Rear Panel Board 8121-0679 W13 (Opti
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Table 3-10 Reference Designator Description Part Number W64 (Option 300) flexible cable, A20 Downconverter (Option 501, 502, 503, 504 with Option 300) to 321.
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Figure 3-15 3-34 Option 501, 502, 503, 504 - Option 1EM Overall Cables (also includes cables for Option UN7, 300, 005, and 001 or 002)
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Option 501, 502, 503, 504 - Option 1EM Semi-Rigid Cables includes the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) or the AT1 High-Power Mechanical Attenuator (Option UNB) with the A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) Table 3-11 Reference Designator Description Part Number W32 wire cable, J36 of A23 Motherboard to P4 of A26 Rear Panel LVDS Board (Option 1EM) 8121-0678 W40
Replaceable Parts Cables for Option 501, 502, 503, 504 Signal Generators Figure 3-16 3-36 Option 501, 502, 503, 504 - Option 1EM Semi-Rigid Cables includes the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) or the AT1 High-Power Mechanical Attenuator (Option UNB) with the A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ)
Replaceable Parts Cables for Option UNJ Signal Generators Cables for Option UNJ Signal Generators Option UNJ - Overall Cables (also includes cables for Option UN7, 005, and 001 or 002) Table 3-12 Reference Designator Description Part Number W1 flexible cable, I INPUT from the front panel to J7 of A10 I/Q Multiplexer 8121-0642 W2 flexible cable, Q INPUT from the front panel to J8 of A10 I/Q Multiplexer 8121-0642 W3 flexible cable, DATA INPUT from the front panel to J21 of A23 Motherboard 8121-066
Replaceable Parts Cables for Option UNJ Signal Generators Table 3-12 Reference Designator Description Part Number W19 flexible cable, J10 of A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) to Q IN of A19 Daughterboard - refer to the connector diagram located on the daughterboard cover 8121-0641 W20 flexible cable, J9 of A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) to I IN of A19 Daughterboard - refer to the connector diagram located on the daughterboard cover 8121-064
Replaceable Parts Cables for Option UNJ Signal Generators Figure 3-17 Option UNJ - Overall Cables (also includes cables for Option UN7, 005, and 001 or 002) 3- 39
Replaceable Parts Cables for Option UNJ Signal Generators Option UNJ - Front Panel Cables Table 3-13 Reference Designator Description Part Number W1 flexible cable, I INPUT from the front panel to J7 of A10 I/Q Multiplexer 8121-0642 W2 flexible cable, Q INPUT from the front panel to J8 of A10 I/Q Multiplexer 8121-0642 W3 flexible cable, DATA from the front panel to J21 of A23 Motherboard 8121-0661 W4 flexible cable, DATA CLOCK from the front panel to J23 of A23 Motherboard 8121-0661 W5 flex
Replaceable Parts Cables for Option UNJ Signal Generators Figure 3-18 Option UNJ - Front Panel Cables 3- 41
Replaceable Parts Cables for Option UNJ Signal Generators Option UNJ - Standard Cables (does not include cables for the front panel, Option UN7, or Option 005) Table 3-14 Reference Designator Part Number W10 ribbon cable, J13 of A7 Baseband Generator (Option 001 or Option 002) to P2 of A25 Rear Panel Board 8121-0679 W11 semi-rigid cable, output of the A16 Frac-N (Option UNJ or Option 506) to input of the A15 Sampler (Option UNJ or Option 506) - passes through the A19 Daughterboard E4400-60622 flexi
Replaceable Parts Cables for Option UNJ Signal Generators Figure 3-19 Option UNJ - Standard Cables (does not include cables for the front panel, Option UN7, or Option 005) 3- 43
Replaceable Parts Cables for Option UNJ Signal Generators Option UNJ - Only Option UN7, 005, and 001 or 002 Cables Table 3-15 Reference Designator Description Part Number ribbon cable, J13 of A7 Baseband Generator (Option 001 or Option 002) to J3 of A11 Internal Bit Error Rate Analyzer (Option UN7) to P2 of A25 Rear Panel Board 8121-0679 flexible cable, J800 of A7 Baseband Generator (Option 001 or Option 002) to BASEBAND GEN REF IN of the rear panel 8121-0643 W23 (Option UN7) flexible cable, J4 of
Replaceable Parts Cables for Option UNJ Signal Generators Figure 3-20 Option UNJ - Only Option UN7, 005, and 001 or 002 Cables 3- 45
Replaceable Parts Cables for Option UNJ Signal Generators Option UNJ - Semi-Rigid Cables includes the A21 YTO Driver (Option UNJ or Option 506) and the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) or the AT1 High-Power Mechanical Attenuator (Option UNB) with A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) Table 3-16 Reference Designator 3-46 Description Part Number W9 semi-rigid cable, output of AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Optio
Replaceable Parts Cables for Option UNJ Signal Generators Table 3-16 Reference Designator Description Part Number When using the AT1 High-Power Mechanical Attenuator (Option UNB) with the A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) W47 semi-rigid cable, output of A13 Output (Option UNB) to input of AT1 High-Power Mechanical Attenuator (Option UNB) - passes through the A19 Daughterboard E4400-60627 W48 semi-rigid cable, AT1 High-Power Mechanical Attenuator (Option UNB) to i
Replaceable Parts Cables for Option UNJ Signal Generators Figure 3-21 3-48 Option UNJ - Semi-Rigid Cables includes the A21 YTO Driver (Option UNJ or Option 506) and the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) or the AT1 High-Power Mechanical Attenuator (Option UNB) with A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ)
Replaceable Parts Cables for Option UNJ Signal Generators Option UNJ - Option 1EM Overall Cables (also includes cables for Option UN7, 005, and 001 or 002) Table 3-17 Reference Designator Description Part Number W10 ribbon cable, J13 of A7 Baseband Generator (Option 001 or Option 002) to J3 of A11 Internal Bit Error Rate Analyzer (Option UN7) to P2 of A25 Rear Panel Board 8121-0679 W11 semi-rigid cable, output of the A16 Frac-N (Option UNJ or Option 506) to input of the A15 Sampler (Option UNJ or Op
Replaceable Parts Cables for Option UNJ Signal Generators Table 3-17 Reference Designator W43 Description semi-rigid cable, output of A13 Output (Option 501, 502, 503, 504 or Option UNJ) to input of AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) - passes through the A19 Daughterboard Part Number E4400-60625 W70a (Option 1EM) flexible cable, EXT 1 from the rear panel to EXT 1 of A19 Daughterboard - refer to the connector diagram located on the daughterboard cover 8121-0654 W71a
Replaceable Parts Cables for Option UNJ Signal Generators Figure 3-22 Option UNJ - Option 1EM Overall Cables (also includes cables for Option UN7, 005, and 001 or 002) 3- 51
Replaceable Parts Cables for Option UNJ Signal Generators Option UNJ - Option 1EM Semi-Rigid Cables includes the A21 YTO Driver (Option UNJ or Option 506) and the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) or the AT1 High-Power Mechanical Attenuator (Option UNB) with A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) Table 3-18 Reference Designator Description Part Number E4400-60622 W11 semi-rigid cable, output of the A16 Frac-N (Option UNJ or Option 506)
Replaceable Parts Cables for Option UNJ Signal Generators Table 3-18 Reference Designator Description Part Number When using the AT1 High-Power Mechanical Attenuator (Option UNB) with the A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) W47 semi-rigid cable, output of A13 Output (Option UNB) to input of AT1 High-Power Mechanical Attenuator (Option UNB) - passes through the A19 Daughterboard E4400-60627 W48 semi-rigid cable, AT1 High-Power Mechanical Attenuator (Option UNB) to i
Replaceable Parts Cables for Option UNJ Signal Generators Figure 3-23 3-54 Option UNJ - Option 1EM Semi-Rigid Cables includes the A21 YTO Driver (Option UNJ or Option 506) and the AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) or the AT1 High-Power Mechanical Attenuator (Option UNB) with A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ)
Replaceable Parts Cables for Option 506 Signal Generators Cables for Option 506 Signal Generators Option 506 - Overall Cables (also includes cables for Option UN7, 005, and 001 or 002) Table 3-19 Reference Designator Description Part Number W1 flexible cable, I INPUT from the front panel to J7 of A10 I/Q Multiplexer 8121-0642 W2 flexible cable, Q INPUT from the front panel to J8 of A10 I/Q Multiplexer 8121-0642 W3 flexible cable, DATA from the front panel to J21 of A23 Motherboard 8121-0661 W4
Replaceable Parts Cables for Option 506 Signal Generators Table 3-19 Reference Designator Description Part Number W24 (Option UN7) flexible cable, J5 of A11 Internal Bit Error Rate Analyzer (Option UN7) to BER CLK IN of the rear panel 8121-0659 W25 (Option UN7) flexible cable, J6 of A11 Internal Bit Error Rate Analyzer (Option UN7) to BER GATE IN of the rear panel 8121-0659 W26 (Option 005) ribbon cable, A5 10 GB Hard Drive (Option 005) to P3 of A12 CPU 8121-0685 W27 ribbon cable, J2 of A21 YT
Replaceable Parts Cables for Option 506 Signal Generators Figure 3-24 Option 506 - Overall Cables (also includes cables for Option UN7, 005, and 001 or 002) 3- 57
Replaceable Parts Cables for Option 506 Signal Generators Option 506 - Front Panel Cables Table 3-20 Reference Designator Description Part Number W1 flexible cable, I INPUT from the front panel to J7 of A10 I/Q Multiplexer 8121-0642 W2 flexible cable, Q INPUT from the front panel to J8 of A10 I/Q Multiplexer 8121-0642 W3 flexible cable, DATA from the front panel to J21 of A23 Motherboard 8121-0661 W4 flexible cable, DATA CLOCK from the front panel to J23 of A23 Motherboard 8121-0661 W5 flex
Replaceable Parts Cables for Option 506 Signal Generators Figure 3-25 Option 506 - Front Panel Cables 3- 59
Replaceable Parts Cables for Option 506 Signal Generators Option 506 - Standard Cables (does not include cables for the front panel, Option UN7, or Option 005) Table 3-21 Reference Designator Part Number W10 ribbon cable, J13 of A7 Baseband Generator (Option 001 or Option 002) to J3 of A11 Internal Bit Error Rate Analyzer (Option UN7) to P2 of A25 Rear Panel Board 8121-0679 W11 semi-rigid cable, output of the A16 Frac-N (Option UNJ or Option 506) to input of the A15 Sampler (Option UNJ or Option 506)
Replaceable Parts Cables for Option 506 Signal Generators Table 3-21 Reference Designator Description Part Number E4400-60630 W58 semi-rigid cable, output of A13 Output (Option UNB) to input of the A14 Extended Frequency Output (Option 506) - passes through the A19 Daughterboard W87 flexible cable, J10 of A10 I/Q Multiplexer (Option 506) to A19 Daughterboard - refer to the connector diagram located on the daughterboard cover 8121-0641 W88 flexible cable, J9 of A10 I/Q Multiplexer (Option 506) to
Replaceable Parts Cables for Option 506 Signal Generators Figure 3-26 3-62 Option 506 - Standard Cables (does not include cables for the front panel, Option UN7, or Option 005)
Replaceable Parts Cables for Option 506 Signal Generators Option 506 - Only Option UN7, 005, and 001 or 002 Cables Table 3-22 Reference Designator Description Part Number ribbon cable, J13 of A7 Baseband Generator (Option 001 or Option 002) to J3 of A11 Internal Bit Error Rate Analyzer (Option UN7) to P2 of A25 Rear Panel Board 8121-0679 flexible cable, J800 of A7 Baseband Generator (Option 001 or Option 002) to BASEBAND GEN REF IN of the rear panel 8121-0643 W23 (Option UN7) flexible cable, J4 of
Replaceable Parts Cables for Option 506 Signal Generators Figure 3-27 3-64 Option 506 - Only Option UN7, 005, and 001 or 002 Cables
Replaceable Parts Cables for Option 506 Signal Generators Option 506 - Semi-Rigid Cables includes the A21 YTO Driver (Option UNJ or Option 506) and the AT1 High-Power Mechanical Attenuator (Option UNB) with an A29 DC Blocking Capacitor (Option 506) Table 3-23 Reference Designator Description Part Number E4400-60622 W11 semi-rigid cable, output of the A16 Frac-N (Option UNJ or Option 506) to input of the A15 Sampler (Option UNJ or Option 506) - passes through the A19 Daughterboard W31 flexible cable,
Replaceable Parts Cables for Option 506 Signal Generators Table 3-23 Reference Designator W59 semi-rigid cable, output of AT1 High-Power Mechanical Attenuator (Option UNB) to input of A29 DC Blocking Capacitor (Option 506) W60 connector, output of A29 DC Blocking Capacitor (Option 506) to input of RF OUTPUT Figure 3-28 3-66 Description Option 506 - Semi-Rigid Cables includes the A21 YTO Driver (Option UNJ or Option 506) and the AT1 High-Power Mechanical Attenuator (Option UNB) with an A29 DC Blockin
Replaceable Parts Cables for Option 506 Signal Generators Option 506 - Option 1EM Overall Cables (also includes cables for Option UN7, 005, and 001 or 002) Table 3-24 Reference Designator Description Part Number W10 ribbon cable, J13 of A7 Baseband Generator (Option 001 or Option 002) to J3 of A11 Internal Bit Error Rate Analyzer (Option UN7) to P2 of A25 Rear Panel Board 8121-0679 W11 semi-rigid cable, output of the A16 Frac-N (Option UNJ or Option 506) to input of the A15 Sampler (Option UNJ or Op
Replaceable Parts Cables for Option 506 Signal Generators Table 3-24 Reference Designator Description Part Number W72 (Option 1EM) flexible cable, I IN from the rear panel to J7 of A10 I/Q Multiplexer 8121-0652 W73 (Option 1EM) flexible cable, Q IN from the rear panel to J8 of A10 I/Q Multiplexer 8121-0652 W74 (Option 1EM) flexible cable, J11 of A10 I/Q Multiplexer to I OUT of the rear panel 8121-0653 W75 (Option 1EM) flexible cable, J12 of A10 I/Q Multiplexer to Q OUT of the rear panel 8121-
Replaceable Parts Cables for Option 506 Signal Generators Figure 3-29 Option 506 - Option 1EM Overall Cables (also includes cables for Option UN7, 005, and 001 or 002) 3- 69
Replaceable Parts Cables for Option 506 Signal Generators Option 506 - Option 1EM Semi-Rigid Cables includes the A21 YTO Driver (Option UNJ or Option 506) and the AT1 High-Power Mechanical Attenuator (Option UNB) with an A29 DC Blocking Capacitor (Option 506) Table 3-25 Reference Designator 3-70 Description Part Number E4400-60622 W11 semi-rigid cable, output of the A16 Frac-N (Option UNJ or Option 506) to input of the A15 Sampler (Option UNJ or Option 506) - passes through the A19 Daughterboard W32
Replaceable Parts Cables for Option 506 Signal Generators Table 3-25 Reference Designator Description W79 (Option 1EM) flexible cable, J20 of A23 Motherboard to SWP OUT of the rear panel W84 (Option 1EM) semi-rigid cable, output of A13 Output (Option UNB) to COH CARRIER of the rear panel - passes through the A19 Daughterboard E4400-60631 W91 (Option 1EM) semi-rigid cable, output of AT1 High-Power Mechanical Attenuator (Option UNB) to input of A29 DC Blocking Capacitor (Option 506) E4400-20574 Fig
Replaceable Parts Hardware and Other Instrument Parts Hardware and Other Instrument Parts This section lists part numbers for hardware and other instrument parts in your signal generator.
Replaceable Parts Hardware and Other Instrument Parts Hardware of the Front Panel Table 3-26 Item No.
Replaceable Parts Hardware and Other Instrument Parts Figure 3-31 3-74 Hardware of the Front Panel
Replaceable Parts Hardware and Other Instrument Parts Hardware of a Disassembled Front Panel Table 3-27 Item No.
Replaceable Parts Hardware and Other Instrument Parts Figure 3-32 3-76 Hardware of a Disassembled Front Panel
Replaceable Parts Hardware and Other Instrument Parts Hardware of the Rear-Panel (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Table 3-28 Item No.
Replaceable Parts Hardware and Other Instrument Parts Figure 3-33 3-78 Hardware of the Rear-Panel (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506)
Replaceable Parts Hardware and Other Instrument Parts Hardware of the Rear-Panel (Option 1EM) Table 3-29 Item No.
Replaceable Parts Hardware and Other Instrument Parts Figure 3-34 3-80 Hardware of the Rear-Panel (Option 1EM)
Replaceable Parts Hardware and Other Instrument Parts Hardware of a Disassembled AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) Table 3-30 Item No.
Replaceable Parts Hardware and Other Instrument Parts Hardware of a Disassembled AT1 High-Power Mechanical Attenuator (Option UNB) and A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) Table 3-31 Item No.
Replaceable Parts Hardware and Other Instrument Parts Figure 3-36 Hardware of a Disassembled AT1 High-Power Mechanical Attenuator (Option UNB) and A28 Reverse Power Protection (Option 501, 502, 503, 504, or Option UNJ) 3- 83
Replaceable Parts Hardware and Other Instrument Parts Hardware of a Disassembled AT1 High-Power Mechanical Attenuator (Option UNB) on Option 506 Only Table 3-32 Item No.
Replaceable Parts Hardware and Other Instrument Parts Hardware of the A6 Power Supply Shield and Left-Side (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Table 3-33 Item No.
Replaceable Parts Hardware and Other Instrument Parts Hardware of the A23 Motherboard and Bottom-Side (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Table 3-34 Item No.
Replaceable Parts Hardware and Other Instrument Parts Hardware of the Outside Instrument Covers and Associated Parts (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Table 3-35 Item No.
Replaceable Parts Hardware and Other Instrument Parts Figure 3-40 3-88 Hardware of the Outside Instrument Covers and Associated Parts (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506)
Replaceable Parts Hardware and Other Instrument Parts Hardware of the Inside Instrument Covers and Associated Parts (Option 501, 502, 503, 504, Option 300, Option UNJ, or Option 506) Table 3-36 Item No.
Replaceable Parts Miscellaneous Miscellaneous This section lists part numbers for miscellaneous items that can be used with your signal generator.
Replaceable Parts Abbreviations Used in Part Descriptions Abbreviations Used in Part Descriptions This section defines the reference designators, abbreviations, and option numbers that are used in the part descriptions throughout this chapter.
Replaceable Parts Abbreviations Used in Part Descriptions 3-92
4 Post-Repair Procedures 4- 1
Post-Repair Procedures Post-Repair Procedures Matrix Post-Repair Procedures Matrix Performance Tests for Assemblies A1 through A16 A3 Front Panel Auxilary Board A4 Inverter A5 10 GB Hard Drive (Option 005) A6 Power Supply A7 Baseband Generator (Option 001) or A7 Baseband Generator (Option 002) A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300) A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) or A10 I/Q Multiplexer (Option 506) A11 Internal Bit Error Rate Analyzer (Optio
Post-Repair Procedures Post-Repair Procedures Matrix Performance Tests for Assemblies A1 through A16 X X X X X X X X A16 Frac-N (Option UNJ or Option 506) X A15 Sampler (Option UNJ or Option 506) A13 Output (Option 501, 502, 503, 504 or Option UNJ) or A13 Output (Option UNB) A12 CPU A6 Power Supply A5 10 GB Hard Drive (Option 005) A4 Inverter A3 Front Panel Auxilary Board A2DS1 Display Backlight A7 Baseband Generator (Option 001) or A7 Baseband Generator (Option 002) X A14 Extended Freque
Post-Repair Procedures Post-Repair Procedures Matrix Performance Tests for Assemblies A17 through A29, B1, B2, B3, and the RF Output Connector A25 Rear Panel Board A26 Rear Panel LVDS Board (Option 1EM) and A27 Rear Panel SMB Board (Option 1EM) AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) or AT1 High-Power Mechanical Attenuator (Option UNB) and A28 Reverse Power Protection (Option 501, 502, 503, 504 or Option UNJ) or AT1 High Power Mechanical Attenuator (Option 506 with Option UNB
Self Test should be performed each time that any assembly is repaired or replaced. Phase Noise and Residual FM (Manual Test - Option UNJ or Option 506 Only) GSM Loopback BER Check (Option 300 Only) X X The following performance tests are listed in the order that they should be performed to minimize changes in test equipment configurations.
Post-Repair Procedures Post-Repair Procedures Matrix Adjustments for Assemblies A1 through A16 A2DS1 Display Backlight A3 Front Panel Auxilary Board A4 Inverter A5 10 GB Hard Drive (Option 005) A6 Power Supply A7 Baseband Generator (Option 001) or A7 Baseband Generator (Option 002) A9 Digital Demodulator (Option 501, 502, 503, 504 with Option 300) A10 I/Q Multiplexer (Option 501, 502, 503, 504 or Option UNJ) or A10 I/Q Multiplexer (Option 506) A11 Internal Bit Error Rate Analyzer (Option UN7) A12
Post-Repair Procedures Post-Repair Procedures Matrix Adjustments for Assemblies A1 through A16 X X X X X X X X X X X X A16 Frac-N (Option UNJ or Option 506) X X X X X X X X X X X X A15 Sampler (Option UNJ or Option 506) A14 Extended Frequency Output (Option 506) X X A12 CPU A6 Power Supply A5 10 GB Hard Drive (Option 005) A4 Inverter A3 Front Panel Auxilary Board A2DS1 Display Backlight A7 Baseband Generator (Option 001) or A7 Baseband Generator (Option 002) X X A13 Output (Option 501, 502, 5
Post-Repair Procedures Post-Repair Procedures Matrix Adjustments for Assemblies A17 through A29, B1, B2, B3, and the RF Output Connector A20 Downconverter (Option 501, 502, 503, 504 with Option 300) A21 YTO Driver (Option UNJ or Option 506) A22 Coupler (Option 506) A23 Motherboard A23BT1 Battery A24 Line Module A25 Rear Panel Board A26 Rear Panel LVDS Board (Option 1EM) and A27 Rear Panel SMB Board (Option 1EM) AT1 Electronic Attenuator (Option 501, 502, 503, 504 or Option UNJ) or AT1 High-Power M
Self Test should be performed each time that any assembly is repaired or replaced. Prelevel Calibration Power Level Accuracy, High Power Calibration ALC Modulation Driver Bias Calibration X X The following adjustments are listed in the order that they should be performed for proper calibration.
Post-Repair Procedures Post-Repair Procedures Matrix 4-10
5 Safety and Regulatory 5- 1
Safety and Regulatory Safety Notes Safety Notes The following safety notes are used throughout this manual. Familiarize yourself with each of the notes and its meaning before operating this instrument. CAUTION Caution denotes a hazard. It calls attention to a procedure that, if not correctly performed or adhered to, would result in damage to or destruction of the product. Do not proceed beyond a caution sign until the indicated conditions are fully understood and met. WARNING Warning denotes a hazard.
Safety and Regulatory General Safety Considerations General Safety Considerations The following safety notes apply specifically to signal generators. These notes also appear in other chapters of this service guide as required. WARNING These servicing instructions are for use by qualified personal only. To avoid electrical shock, do not perform any servicing unless you are qualified to do so. WARNING The opening of covers or removal of parts is likely to expose dangerous voltages.
Safety and Regulatory Lithium Battery Disposal Lithium Battery Disposal When the battery on the A14 CPU/Motherboard is exhausted and/or ready for disposal, dispose of it according to your country’s requirements.
Safety and Regulatory Warranty Warranty This Agilent Technologies product is warranted against defects in material and workmanship for a period of three years from date of shipment. During the warranty period, Agilent Technologies will, at its option, either repair or replace products which prove to be defective. For warranty service or repair, this product must be returned to a service facility designated by Agilent Technologies.
Safety and Regulatory Assistance Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products. For any assistance, contact your nearest Agilent Technologies sales and service office.
Safety and Regulatory Notice Notice The information contained in this document is subject to change without notice. Agilent Technologies 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. Agilent Technologies 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.
Safety and Regulatory Certification Certification Agilent Technologies Company certifies that this product met its published specifications at the time of shipment from the factory. Agilent Technologies 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.
Index B T block description Option 501, 502, 503, 504, 1-116 Option UNJ and Option 506, 1-130 troubleshooting A12 CPU power-on failures, 1-5 adjustment problems, 1-85 assembly level problems, 1-23 front panel display problems, 1-9 getting started, 1-3 keyboard problems, 1-9 list of adjustments, 4-2 list of performance tests, 4-2 list of self-test failures, 1-20 performance test problems, 1-91 power supply failures, 1-4 power supply vs.
Index I-2 Index
