Service Guide Agilent Technologies 8712ET/ES and 8714ET/ES RF Network Analyzers Part No.
Notice. This information contained in this document is subject to change without notice. Agilent Techologies 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 Techologies 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.
8712ET/ES and 8714ET/ES Network Analyzer Documentation Map The CDROM provides the contents of all of the documents listed below. The User’s Guide shows how to make measurements, explains commonly-used features, and tells you how to get the most performance from the analyzer. The LAN Interface User’s Guide Supplement shows how to use a local area network (LAN) for programming and remote operation of the analyzer.
The HP Instrument BASIC User’s Handbook Supplement shows how to use HP Instrument BASIC to program the analyzer. The Option 100 Fault Location and Structural Return Loss Measurements User’s Guide Supplement provides theory and measurement examples for making fault location and SRL measurements. (Shipped only with Option 100 analyzers.) The CATV Quick Start Guide provides abbreviated instructions for testing the quality of coaxial cables. (Shipped only with Option 100 analyzers.
Contents 1. Performance Checks Performing the Operator's Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 Equipment List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3 Make a Transmission (or S21 and S12) Measurement(s) . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4 Make a Broadband Power Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Contents 3. Assembly Replacement Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Required Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Assembly Removal/Replacement Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 A1 Front Panel Assembly Replacement . . . . . . . . . . . . . . . . . . . .
Contents Category 3 Failures: Inaccurate (but reasonably functional) Measurements. . . . . . . . . . . .4-33 Troubleshooting Inaccurate Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-33 RF Power Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-37 Category 4 Failures: Peripheral Device Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-38 DIN Keyboard . . . . . . .
Contents Storing Correction Constants to EPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4 Installing Correction Constants from Disk. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4 In Case of Difficulties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4 Upgrading or Re-Installing Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8712ET/ES and 8714ET/ES RF Network Analyzers 1 Performance Checks Service Guide 1-1
Performance Checks 8712ET/ES and 8714ET/ES RF Network Analyzers This chapter is divided into three parts: • “Performing the Operator's Check” on page 1-3 • “Performance Test Software” on page 1-10 • “Specifications” on page 1-36 The operator's check can be used as a quick 80% confidence test. The only equipment required for this check is a type-N cable and a good quality 50Ω type-N load (75Ω for Option 1EC analyzers).
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performing the Operator's Check Performing the Operator's Check The operator's check should be performed when you receive your instrument, and any time you wish to have confidence that the analyzer is working properly. The operator's check does not verify conformance to specifications, but should give you a high degree of confidence that the instrument is performing properly if it passes.
Performance Checks Performing the Operator's Check 8712ET/ES and 8714ET/ES RF Network Analyzers Make a Transmission (or S21 and S12) Measurement(s) 1. Connect the equipment as shown in Figure 1-1. Use a known good cable such as the one that was supplied with your analyzer. The quality of the cable will affect these measurements; make sure you use a cable with the characteristics described in “Equipment List” on page 1-3. NOTE Figure 1-1 Equipment Setup for Performing the Operator’s Check 2.
8712ET/ES and 8714ET/ES RF Network Analyzers Figure 1-2 Performance Checks Performing the Operator's Check Verify Transmission (or S21 and S12) Measurement Perform the following steps on ES model analyzers only. 6. Press MEAS 1 7. Press CAL S12 Rev Trans . Default Response . 8. Verify again that the data trace falls within ±0.5 dB of 0 dB. See Figure 1-2.
Performance Checks Performing the Operator's Check 8712ET/ES and 8714ET/ES RF Network Analyzers Make a Broadband Power Measurement 1. Leave the cable connected to the analyzer as shown in Figure 1-1. NOTE The quality of the cable will affect these measurements; make sure you use a cable with the characteristics described in “Equipment List” on page 1-3. 2. Press MEAS 1 . 3. If Power is not displayed, press More . 4. Press Power 5. Press POWER FREQ 0 Start 10 MHz SCALE 1 Enter . dBm . 6.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performing the Operator's Check Make a Reflection (or S11 and S22) Measurement with a Cable 1. Leave the cable connected to the analyzer as shown in Figure 1-1. NOTE The quality of the cable will affect these measurements; make sure you use a cable with the characteristics described in “Equipment List” on page 1-3. 2. Press PRESET MEAS 1 . 3. For ES models, press S11 Refl Port1 . For ET models, press Reflection . 4. Press SCALE 5.
Performance Checks Performing the Operator's Check 8712ET/ES and 8714ET/ES RF Network Analyzers Make a Reflection (or S11 and S22) Measurement with a Load 1. Disconnect the cable and connect a known good load to the RF OUT/PORT 1 test port as shown in Figure 1-5. Figure 1-5 Connect the Load 2. For ES models, press MEAS 1 S11 Refl Port1 . 3. Verify that the data trace falls below −30 dB.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performing the Operator's Check This concludes the operator's check. However, further confidence can be obtained by performing the following: • Measure a known filter to verify that its measured response is the same as is expected. (A 175 MHz filter is supplied with the analyzer.) Verify both the frequency accuracy and noise floor. • Check broadband response with the filter using conversion-loss mode (same as B*/R*).
Performance Checks Performance Test Software 8712ET/ES and 8714ET/ES RF Network Analyzers Performance Test Software The performance test software provides automated tests for verifying that the analyzer meets its published specifications with greater than a 95% confidence level. The performance test software must be run on an external controller running HP BASIC (the analyzer’s internal IBASIC cannot be used). The performance tests can be considered a check of the overall calibration of the instrument.
8712ET/ES and 8714ET/ES RF Network Analyzers NOTE Performance Checks Performance Test Software To order the performance test software, contact the nearest Agilent Technologies sales or service office listed in Table 9-1 on page 9-7. The workstation version is HP part number 08714-10001 (LIF format). The PC version is HP part number 08714-10002 (DOS format), and requires HP BASIC for Windows (HP model number E2060B), and a GPIB interface card.
Performance Checks Performance Test Software 8712ET/ES and 8714ET/ES RF Network Analyzers Equipment In addition to a computer, printer, RF cables, BNC cables, GPIB cables, and adapters, Table 1-1 lists the equipment that is required to test and adjust the analyzer. Table 1-1 Required Equipment for Performance Tests Description HP/Agilent Model # 50Ω STD 75Ω Notes Function generator 8116A or 33120A ✓ ✓ No substitute. (The 8116A is preferred.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performance Test Software File Structure The program disk contains several different files in addition to the main program file. The following list describes the files found on the performance test software disk. CAL871XE This is the main program file. Cfg_xxxx This is the configuration file. The variable xxxx represents any user-defined name or Dflt (default).
Performance Checks Performance Test Software INSTALL NOTE 8712ET/ES and 8714ET/ES RF Network Analyzers This program is not necessary but can help speed the installation of the LIF version program. It automatically copies the required files into the desired location. Several data files are present on the disk with the “xxxx” suffix. These are default files that allow operation of the program without correction factors. The values in these file are nominal values.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performance Test Software Getting Started CAUTION Make a copy of the performance test software disk for day-to-day use. The master copy should remain stored in a safe place. This will decrease the likelihood of damage to the master disk. NOTE The DOS version, which is used in conjunction with HP BASIC for Windows, requires the proper setup of the GPIB interface card and drivers.
Performance Checks Performance Test Software 8712ET/ES and 8714ET/ES RF Network Analyzers Configuration Menu In this section, the default values for the parameters listed in bold type appear in parenthesis. The analyzer's GPIB address (716). The first selection is the analyzer’s (DUT) GPIB address. Please note that this is the only address that has both the Interface Select Code (ISC) and the device number associated with it. This address can be any valid address with any valid ISC.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performance Test Software The printer address (01). The printer address is next. No model number is needed here; all GPIB printers should work equally well. For the DOS version, entering any valid number except 10 will direct the output to the attached GPIB printer. Selecting an address of 10 will redirect the output to the defined Windows default printer.
Performance Checks Performance Test Software 8712ET/ES and 8714ET/ES RF Network Analyzers The current DUT file suffix (1). This file, “CurEDUTx,” contains the test-result data of the current device under test. Up to ten different file names can be specified. This allows multiple users to operate from one system storage medium, such as an SRM environment. This entry can be ignored for single-user applications. Config file and cal data generation. 1.
8712ET/ES and 8714ET/ES RF Network Analyzers TIP Performance Checks Performance Test Software Even if you find a mistake, it will be easier to answer yes, then go back and re-edit the values. Otherwise you will have to re-enter all of the values again. 20 dB Attenuators (Pads). A procedure similar to the sensor data entry procedure is used to enter the frequency/attenuation values for the 20 dB attenuators. Valid entries for the 20 dB attenuator range from 17.5 to 23.
Performance Checks Performance Test Software 8712ET/ES and 8714ET/ES RF Network Analyzers PRINT RESULTS allows you to print or view test results from the current DUT or any previously tested analyzer, assuming the data was archived. You can also add comments or correct any header information that was previously entered. Printed test results have a “pass/fail” column for indicating the outcome of each part of each test. The possible outcomes are PASS Applies to a warranted specification.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performance Test Software Test Selection Menu The test selection menu can be divided into three main categories: • eleven automated analyzer performance tests • four utility procedures • two external broadband detector performance tests (HP/Agilent 86200B or 86201B) Data for each of the eleven performance tests is archived upon completion. The four utility programs are described as follows: 1.
Performance Checks Performance Test Software 8712ET/ES and 8714ET/ES RF Network Analyzers The detector performance tests consists of an absolute power accuracy test and a frequency response test as described in the HP/Agilent 86200B/86201B RF Detectors User's and Service Guide. These tests are only for testing these two specific detector models. Archiving of data is not done for these tests. Additional Information The program gives full step-by-step instructions along with connection diagrams.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performance Test Software Performance Test Notes and Descriptions The test descriptions explain how each test is performed in case it is necessary to perform them manually without the automated test software. They are also provided to give automated test users a general idea of what each test measures and how it is performed under computer control.
Performance Checks Performance Test Software 8712ET/ES and 8714ET/ES RF Network Analyzers PT01: Frequency Accuracy This test measures the frequency accuracy of the output of the analyzer. Test Process. Set the analyzer to several CW frequencies while in trigger-hold mode. Connect a frequency measuring device to the output of the analyzer. The device used to measure the frequency can either be a frequency counter or a spectrum analyzer with a high degree of frequency accuracy.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performance Test Software PT02: Gain Compression This test measures narrowband gain compression at or near the maximum rated input levels for the analyzer. Test Process. Set the power output to the lesser of +10 dBm or the maximum value for the analyzer’s model and option configuration. Set the system bandwidth for narrow (250 Hz). Perform an enhanced-response calibration for a transmission measurement.
Performance Checks Performance Test Software 8712ET/ES and 8714ET/ES RF Network Analyzers PT03: Noise Floor This test makes transmission (ratioed) measurements to determine the noise floor for both narrowband and broadband measurements. Test Process. Preset the analyzer and set the power level to 0 dBm. Set the system bandwidth to Fine (15 Hz). Set the averaging factor to 4 and enable averaging. Connect loads to both test ports. Perform a Response and Isolation calibration.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performance Test Software PT04: Dynamic Accuracy This test measures narrowband ratio measurement accuracy over a range of power levels at 30 MHz. A 110 dB step attenuator is needed—typically an 8496A or 8496G is used. Two minimum loss pads must be used with a 75Ω analyzer (Option 1EC). Test Process. Connect the step attenuator between the test ports on the analyzer. Set the CW frequency to 30 MHz and select fine system bandwidth (15 Hz).
Performance Checks Performance Test Software 8712ET/ES and 8714ET/ES RF Network Analyzers PT05: Power Flatness This test checks the maximum variation in output power across the frequency range of the analyzer. Test Process. Connect a calibrated power sensor to the RF OUT/PORT 1 test port. Determine the power levels to test: 1. Refer to “Test Port Output: Power Sweep Ranges” in Table 1-8 starting on page 1-57. 2. Find the entry for the model and option configuration of the analyzer under test. 3.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performance Test Software PT06: Absolute Power Accuracy This test verifies the accuracy of the B* broadband detector from the maximum input level of +16 dBm down to the specified noise floor. The test is designed to be performed at 30 MHz, however 15 MHz may be used if the frequency range of the signal source does not extend to 30 MHz. The 8116A is the preferred signal source, however the 33120A may be used as an alternative.
Performance Checks Performance Test Software 8712ET/ES and 8714ET/ES RF Network Analyzers PT07: Broadband Frequency Response This test checks the frequency response flatness of the broadband B* detector. It is checked at a nominal −6 dBm signal level. Test Process. Connect the output of the analyzer to a power splitter. Connect the power splitter outputs to the analyzer and to a calibrated power meter. Preset the analyzer and make sure the power level is set for 0 dBm.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performance Test Software PT08: Directivity This test checks directivity, source match, and load match. The uncorrected (raw) directivity and source match values are derived from the measurement calibration arrays. Load match is checked using a calibration performed at the end of a through cable. These tests require an 85032B calibration kit (standard or Option 001) for a 50Ω analyzer, or an 85036B calibration kit for a 75Ω analyzer.
Performance Checks Performance Test Software 8712ET/ES and 8714ET/ES RF Network Analyzers If This Test Fails. If directivity (uncorrected) fails, the most likely cause is a defective coupler: the A coupler for the forward direction, or the B coupler for the reverse direction. Source match depends mostly on hardware in the A5 receiver assembly. Load match is solely dependent upon the A5 receiver assembly.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performance Test Software PT09: Harmonics This test uses a spectrum analyzer to measure harmonics on the network analyzer output at 18 different frequencies. Harmonics above 2.9 GHz are not checked. Test Process. Connect the output of the analyzer to the spectrum analyzer with a high quality type-N cable. Step the analyzer through 18 CW frequencies, ranging from 0.3 MHz to 1440 MHz.
Performance Checks Performance Test Software 8712ET/ES and 8714ET/ES RF Network Analyzers PT10: Trace Noise This test checks trace noise magnitude on narrowband and broadband transmission measurements. The measurement trace is normalized to remove the effects of frequency response on the baseline. The marker statistics for standard deviation (SDev) are considered to be equivalent to an RMS calculation. Test Process. Connect a through cable. Preset the analyzer and set the power level to 0 dBm.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Performance Test Software PT11: Crosstalk This test measures the crosstalk between the output signal path and the input signal path inside the analyzer at maximum specified output power level. The test makes a narrowband transmission measurement with shorts connected to both test ports. Test Process. Attach a short to each test port on the analyzer.
Performance Checks Specifications 8712ET/ES and 8714ET/ES RF Network Analyzers Specifications Definitions All specifications and characteristics apply over a 25 °C ±5 °C range (unless otherwise stated) and sixty minutes after the instrument has been turned on. Specification (spec.): Warranted performance. Specifications include guardbands to account for the expected statistical distribution, measurement uncertainties, and changes in performance due to environmental conditions. Characteristic (char.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks System Performance System Performance Table 1-2 System Performance, Corrected, 50Ω, 2-Port Calibration 8712ES/8714ES (50 Ω) 85031B (7-mm, 50 Ω) Cal Kit, User 2-Port Calibration Specification1 (in dB) Description 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz Directivity 55 51 Source Match 51 49 Load Match 55 51 Reflection Tracking ±0.012 ±0.005 Transmission Tracking ±0.033 ±0.
Performance Checks System Performance 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-2 System Performance, Corrected, 50Ω, 2-Port Calibration (continued) 8712ES/8714ES (50 Ω) 85032B/E (Type-N, 50 Ω) Cal Kit, User 2-Port Calibration Specification1 (in dB) Description 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz Directivity 50 47 Source Match 42 36 Load Match 50 47 Reflection Tracking ±0.02 ±0.02 Transmission Tracking ±0.04 ±0.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks System Performance Table 1-2 System Performance, Corrected, 50Ω, 2-Port Calibration (continued) 8712ES/8714ES (50 Ω) 85033D (3.5 mm, 50 Ω) Cal Kit, User 2-Port Calibration Specification1 (in dB) Description 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz Directivity 46 43 Source Match 44 41 Load Match 46 43 Reflection Tracking ±0.016 ±0.008 Transmission Tracking ±0.04 ±0.
Performance Checks System Performance 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-2 System Performance, Corrected, 50Ω, 2-Port Calibration (continued) 8712ES/8714ES (50 Ω) 85038A (7-16, 50 Ω) Cal Kit, User 2-Port Calibration Specification1 (in dB) Description 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz Directivity 40 40 Source Match 37 37 Load Match 40 40 Reflection Tracking ±0.1 ±0.09 Transmission Tracking ±0.054 ±0.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks System Performance Table 1-3 System Performance, Corrected, 75Ω, 2-Port Calibration 8712ES/8714ES (75 Ω) 85036B/E (Type-N, 75 Ω) Cal Kit, User 2-Port Calibration Specification1 (in dB) Description 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz Directivity 48 43 Source Match 41 35 Load Match 48 43 Reflection Tracking ±0.021 ±0.02 Transmission Tracking ±0.042 ±0.
Performance Checks System Performance 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-3 System Performance, Corrected, 75Ω, 2-Port Calibration (continued) 8712ES/8714ES (75 Ω) 85039B (Type-F, 75 Ω) Cal Kit, User 2-Port Calibration Specification1 (in dB) Description 300 kHz to 1.0 GHz 1.0 GHz to 3 GHz Directivity 40 40 Source Match 30 30 Load Match 40 40 ±0.071 ±0.025 ±0.073 ±0.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks System Performance Table 1-4 System Performance, Corrected, 50Ω, T/R Calibration 8712ES/8714ES (50 Ω) 85032B/E (Type-N, 50 Ω) Cal Kit, T/R Calibration Specification1 (in dB) Description Directivity 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz 50 47 Reflection (One-Port Cal) 42 36 Transmission (Enhanced Response Cal) 42 36 Transmission (Response Cal) 18 15 Load Match 18 15 Reflection Tracking ±0.02 ±0.02 Enhanced Response Cal ±0.
Performance Checks System Performance 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-4 System Performance, Corrected, 50Ω, T/R Calibration (continued) 8712ES/8714ES (50 Ω) 85032B/E (Type-N, 50 Ω) Cal Kit, T/R Calibration Transmission Uncertainty: Enhanced Response Calibration (Specification)1,2 Transmission Uncertainty: Response Calibration (Specification)1,2 Reflection Uncertainty: One-Port Calibration (Specification)1 1.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks System Performance Table 1-4 System Performance, Corrected, 50Ω, T/R Calibration (continued) 8712ET/8714ET (50 Ω) with Attenuator Option 1E11 85032B/E (Type-N, 50 Ω) Cal Kit, T/R Calibration Specification2 (in dB) Description Directivity 300 kHz to 1.3 GHz 1.
Performance Checks System Performance 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-4 System Performance, Corrected, 50Ω, T/R Calibration (continued) 8712ET/8714ET (50 Ω) with Attenuator Option 1E11 85032B/E (Type-N, 50 Ω) Cal Kit, T/R Calibration Transmission Uncertainty: Enhanced Response Calibration (Specification)2,3 Transmission Uncertainty: Response Calibration (Specification)2,3 Reflection Uncertainty: One-Port Calibration (Specification)2 1.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks System Performance Table 1-4 System Performance, Corrected, 50Ω, T/R Calibration (continued) 8712ET/8714ET (50 Ω) without Attenuator 85032B/E (Type-N, 50 Ω) Cal Kit, T/R Calibration Specification1 (in dB) Description Directivity 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz 50 47 Reflection (One-Port Cal) 42 36 Transmission (Enhanced Response Cal) 42 36 Transmission (Response Cal) 23 19 Load Match 18 15 Reflection Tracking ±0.02 ±0.
Performance Checks System Performance 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-4 System Performance, Corrected, 50Ω, T/R Calibration (continued) 8712ET/8714ET (50 Ω) without Attenuator 85032B/E (Type-N, 50 Ω) Cal Kit, T/R Calibration Transmission Uncertainty: Enhanced Response Calibration (Specification)1,2 Transmission Uncertainty: Response Calibration (Specification)1,2 Reflection Uncertainty: One-Port Calibration (Specification)1 1.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks System Performance Table 1-5 System Performance, Corrected, 75Ω, T/R Calibration 8712ES/8714ES (75 Ω) 85036B/E (Type-N, 75 Ω) Cal Kit, T/R Calibration Specification1 (in dB) Description Directivity 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz 48 43 Reflection (One-Port Cal) 41 35 Transmission (Enhanced Response Cal) 41 35 Transmission (Response Cal) 18 15 Load Match 18 15 Reflection Tracking ±0.021 ±0.02 Enhanced Response Cal ±0.
Performance Checks System Performance 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-5 System Performance, Corrected, 75Ω, T/R Calibration (continued) 8712ES/8714ES (75 Ω) 85036B/E (Type-N, 75 Ω) Cal Kit, T/R Calibration Transmission Uncertainty: Enhanced Response Calibration (Specification)1,2 Transmission Uncertainty: Response Calibration (Specification)1,2 Reflection Uncertainty: One-Port Calibration (Specification)1 1.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks System Performance Table 1-5 System Performance, Corrected, 75Ω, T/R Calibration (continued) 8712ET/8714ET (75 Ω) with Attenuator Option 1E11 85036B/E (Type-N, 75 Ω) Cal Kit, T/R Calibration Specification2 (in dB) Description Directivity 300 kHz to 1.3 GHz 1.
Performance Checks System Performance 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-5 System Performance, Corrected, 75Ω, T/R Calibration (continued) 8712ET/8714ET (75 Ω) with Attenuator Option 1E11 85036B/E (Type-N, 75 Ω) Cal Kit, T/R Calibration Transmission Uncertainty: Enhanced Response Calibration (Specification)2,3 Transmission Uncertainty: Response Calibration (Specification)2,3 Reflection Uncertainty: One-Port Calibration (Specification)2 1.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks System Performance Table 1-5 System Performance, Corrected, 75Ω, T/R Calibration (continued) 8712ET/8714ET (75 Ω) without Attenuator 85036B/E (Type-N, 75 Ω) Cal Kit, T/R Calibration Specification1 (in dB) Description Directivity 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz 48 43 Reflection (One-Port Cal) 41 35 Transmission (Enhanced Response Cal) 41 35 Transmission (Response Cal) 23 19 Load Match 18 15 Reflection Tracking ±0.
Performance Checks System Performance 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-5 System Performance, Corrected, 75Ω, T/R Calibration (continued) 8712ET/8714ET (75 Ω) without Attenuator 85036B/E (Type-N, 75 Ω) Cal Kit, T/R Calibration Transmission Uncertainty: Enhanced Response Calibration (Specification)1,2 Transmission Uncertainty: Response Calibration (Specification)1,2 Reflection Uncertainty: One-Port Calibration (Specification)1 1.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks System Performance Table 1-6 System Performance, Uncorrected, 50Ω 8712ET/ES and 8714ET/ES (50 Ω) Description 8712ES/8714ES 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz 8712ET/8714ET with Attenuator Option 1E11 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz 8712ET/8714ET (without Attenuator) 300 kHz to 1.3 GHz 1.
Performance Checks System Performance 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-7 System Performance, Uncorrected, 75Ω 8712ET/ES and 8714ET/ES (75 Ω) Description 8712ES/8714ES 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz 8712ET/8714ET with Attenuator Option 1E11 300 kHz to 1.3 GHz 1.3 GHz to 3 GHz 8712ET/8714ET (without Attenuator) 300 kHz to 1.3 GHz 1.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Test Port Output Test Port Output Table 1-8 Test Port Output 8712ET/ES and 8714ET/ES Test Port Output Description Specification Supplemental Information Frequency Range: 8712ET/ES 300 kHz to 1.3 GHz 8714ET/ES 300 kHz to 3.0 GHz Resolution 1 Hz ±5 ppm, 0° to 55 °C, typ. Stability CW Accuracy ±5 ppm at 25° ±5 °C <1Hz at 10% change in line voltage, typ.
Performance Checks Test Port Output 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-8 Test Port Output (continued) 8712ET/ES and 8714ET/ES Test Port Output Description Specification Supplemental Information Output Power Level Accuracy: 8712ET: 50 Ω: With Attenuator Option 1E11 ±2.0 dB Without Attenuator Option 1E1 ±1.0 dB 75 Ω: With Attenuator Option 1E11 ±3.0 dB Without Attenuator Option 1E1 ±1.5 dB 8712ES: 50 Ω ±2.0 dB 75 Ω ±3.0 dB 8714ET: 50 Ω: With Attenuator Option 1E11 ±2.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Test Port Output Table 1-8 Test Port Output (continued) 8712ET/ES and 8714ET/ES Test Port Output Description Specification Supplemental Information Output Power (continued) Minimum Power Setting: 8712ET: 50 Ω: With Attenuator Option 1E11 −60 dBm, nom. Without Attenuator Option 1E1 0 dBm, nom. 75 Ω: With Attenuator Option 1E11 −60 dBm, nom. Without Attenuator Option 1E1 −3 dBm, nom. 8712ES: 50 Ω −60 dBm, nom. 75 Ω −60 dBm, nom.
Performance Checks Test Port Output 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-8 Test Port Output (continued) 8712ET/ES and 8714ET/ES Test Port Output Description Specification Supplemental Information Output Power (continued) <1 GHz Maximum Power >1 GHz Setting:1 8712ET: 50 Ω: With Attenuator Option 1E12 15 dBm 12 dBm Without Attenuator Option 1E1 16 dBm 13 dBm With Attenuator Option 1E12 12 dBm 9 dBm Without Attenuator Option 1E1 13 dBm 10 dBm 50 Ω 13 dBm 10 dBm 75 Ω 10 d
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Test Port Output Table 1-8 Test Port Output (continued) 8712ET/ES and 8714ET/ES Test Port Output Description Nominal (in dBm) Output Power Sweep Ranges: Attn = 0 dB Attn = 10 dB −1 to Pmax2 Attn = 20 dB Attn = 30 dB Attn = 40 dB Attn = 50 dB Attn= 60 dB −11 to 2 −21 to −8 −31 to −18 −41 to −28 −51 to −38 −60 to −48 −14 to −1 −24 to −11 −34 to −21 −44 to −31 −54 to −41 −60 to −51 8712ET: 50 Ω: With Attenuator Option 1E11
Performance Checks Test Port Output 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-8 Test Port Output (continued) 8712ET/ES and 8714ET/ES Test Port Output Description Specification Supplemental Information Output Power (continued) Power Resolution 0.01 dB Attenuator Switch Points: 8712ET: 50 Ω −1, −11, −21, −31, −41, −51 dBm, nom. 75 Ω −4, −14, −24, −34, −44, −54 dBm, nom. 8712ES: 50 Ω −3, −13, −23, −33, −43, −53 dBm, nom. 75 Ω −6, −16, −26, −36, −46, −56 dBm, nom.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Test Port Input Test Port Input Table 1-9 Test Port Input 8712ET/ES and 8714ET/ES Test Port Input Description Specification Supplemental Information Frequency Range 8712ET/ES: Narrowband 300 kHz to 1.3 GHz Broadband 10 MHz to 1.3 GHz 8714ET/ES: Narrowband 300 kHz to 3.0 GHz Broadband 10 MHz to 3.0 GHz Maximum Input Level 8712ET/8714ET +10 dBm at 0.5 dB compression 8712ES and 8714ES: Narrowband, Frequency >1 MHz +10 dBm at 0.
Performance Checks Test Port Input 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-9 Test Port Input (continued) 8712ET/ES and 8714ET/ES Test Port Input Description Spec.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Test Port Input Table 1-9 Test Port Input (continued) 8712ET/ES and 8714ET/ES Test Port Input Description Spec.
Performance Checks Test Port Input 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-9 Test Port Input (continued) 8712ET/ES and 8714ET/ES Test Port Input Description Spec.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Test Port Input Table 1-9 Test Port Input (continued) 8712ET/ES and 8714ET/ES Test Port Input Description Spec.
Performance Checks Test Port Input 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-9 Test Port Input (continued) 8712ET/ES and 8714ET/ES Test Port Input Description Spec.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Test Port Input Table 1-9 Test Port Input (continued) 8712ET/ES and 8714ET/ES Test Port Input Description Spec. Typical System Bandwidths: Narrow (250 Hz) Narrow (250 Hz) Med Wide (4000 Hz) Wide (6500 Hz) 0.01 dB rms 0.03 dB-pp 0.12 dB-pp 0.28 dB-pp 0.2 Deg-pp 2.5 Deg-pp 3.4 Deg-pp 0.01 dB rms 0.01 dB-pp 0.02 dB-pp 0.15 dB-pp 0.01 dB rms 0.02 dB-pp 0.06 dB-pp 0.23 dB-pp 0.2 Deg-pp 0.8 Deg-pp 1.8 Deg-pp 0.01 dB-pp 0.
Performance Checks Test Port Input 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-9 Test Port Input (continued) 8712ET/ES and 8714ET/ES Test Port Input Dynamic Accuracy (Specification) 1,2 8712ET/8714ET: 8712ES/8714ES: 1. Narrowband detection mode 2. The reference power for dynamic accuracy is −20 dBm.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Test Port Input Table 1-9 Test Port Input (continued) 8712ET/ES and 8714ET/ES Test Port Input Power Accuracy: (Characteristic) 8712ET/8714ET1: Magnitude 8712ES/8714ES1: Magnitude 1.
Performance Checks Test Port Input 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-9 Test Port Input (continued) 8712ET/ES and 8714ET/ES Test Port Input Group Delay Accuracy1 (Characteristic) 8712ET/ES and 8714ET/ES 1. Valid for 85032B/E (type-N 50 Ω) and 85036B/E (type-N 75 Ω) cal kits using either a two-port or enhanced response calibration.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks General Information General Information Table 1-10 General Information 8712ET/ES and 8714ET/ES General Information Description Specification Supplemental Information Display Range Magnitude 200 dB (at 20 dB/div), max Phase 1800° (at 180°/div), max Polar 1 MUnit, max Display Resolution Magnitude 0.01 dB/div, min Phase 0.
Performance Checks General Information 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-10 General Information (continued) 8712ET/ES and 8714ET/ES General Information Description Specification Supplemental Information System Bandwidths Wide (6500 Hz) 6500 Hz, nom Medium Wide (4000 Hz) 4000 Hz, nom Medium (3700 Hz) 3700 Hz, nom Medium Narrow (1200 Hz) 1200 Hz, nom Narrow (250 Hz) 250 Hz, nom Fine (15 Hz) 15 Hz, nom Rear Panel Auxiliary Input: Connector Female BNC Impedance 10 kΩ, nom.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks General Information Table 1-10 General Information (continued) 8712ET/ES and 8714ET/ES General Information Description Specification Supplemental Information Rear Panel (continued) External Reference In: Input Frequency 10 MHz, nom. Input Power −5 dBm to +12 dBm, nom. Input Impedance 50 Ω, nom. VGA Video Output 15-pin mini D-Sub; female. Firmware supports normal and inverse video color formats.
Performance Checks General Information 8712ET/ES and 8714ET/ES RF Network Analyzers Table 1-10 General Information (continued) 8712ET/ES and 8714ET/ES General Information Description Specification Supplemental Information General Environmental ESD Minimize using static-safe work procedures and an antistatic bench mat (part number 9300-0797). Dust Minimize for optimum reliability. Operating Environment Temperature 0 °C to +55 °C Humidity 5% to 95% at +40 °C Altitude 0 to 4.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks General Information Table 1-10 General Information (continued) 8712ET/ES and 8714ET/ES General Information Measurement Speed Conditions1 Cal Type Number Meas Number Freq of Chans BW of Points Span2 Typical Cycle Time3 Recall State & Cal4 Data Xfer5 Meas Cycle6 0.47 s 26 ms 0.63 s 0.58 s 38 ms 0.76 s 1.6 s 0.16 s 2.5 s 1-Port 1 6500 201 100 MHz 72 ms 1-Port 1 6500 201 2 GHz 0.
Performance Checks General Information 8712ET/ES and 8714ET/ES RF Network Analyzers 1. Measurements are always made with error correction enabled. 2. Center frequency is set to 1 GHz. 3. “Cycle Time” is the time required for the analyzer to finish one complete sweep cycle including the forward sweep, retrace, bandcrossings, and calculation time when in the “Continuous Sweep” mode. 4. This is the time to recall both the system state and calibration data. 5.
12ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Features Features Measurement Number of Display Measurements Two measurement displays are available. Each measurement can have independent instrument sweep and control parameters (including frequency settings, IF bandwidth, power level, number of trace points, averaging, format, and scale). The instrument can display a single measurement or dual measurements, on a split (two graticules) or overlaid (one graticule) screen.
Performance Checks Features 8712ET/ES and 8714ET/ES RF Network Analyzers Data Markers Each measurement channel has eight markers. Markers are coupled between channels. Any one of eight markers can be the reference marker for delta-marker operation. Annotation for up to four markers can be displayed at one time. Marker Functions Markers can be used in absolute or delta modes. Other marker functions include: mkr→center, mkr→reference, mkr→electrical delay, searches, tracking, and statistics.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Features Data Hardcopy Hardcopy prints can be made using PCL and PCL5 printers (such as HP DeskJet or LaserJet series of printers), or Epson-compatible graphics printers. Single color and multicolored formats are supported. Hardcopy plots can be automatically produced with HP-GL-compatible plotters such as the HP 7475A, or with printers that support HP-GL. The analyzer provides Centronics (parallel), RS-232C, GPIB, and LAN interfaces.
Performance Checks Features 8712ET/ES and 8714ET/ES RF Network Analyzers SICL LAN: SICL LAN is a LAN protocol using the Standard Instrument Control Library (SICL). It provides control of your analyzer over the LAN using a variety of computing platforms, I/O interfaces, and operating systems. With SICL LAN, a remote analyzer can be controlled over the LAN with the same methods used for a local analyzer connected directly to the controller with GPIB.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Features Calibration Interpolation Calibration interpolation is always active. The analyzer automatically recalculates the error coefficients when the test frequencies or the number of points have changed. The resulting frequency range must be within the frequency range used during the user calibration. If this is not the case, the analyzer reverts to the factory default calibration.
Performance Checks Features 8712ET/ES and 8714ET/ES RF Network Analyzers Calibration Kits Data for several standard calibration kits are stored in the instrument for use by calibration routines. They include: • 3.
8712ET/ES and 8714ET/ES RF Network Analyzers Performance Checks Features Options 75 Ohms (Option 1EC) Provides 75 ohm system impedance. Fault location and structural return loss (Option 100) For fully characterizing cable performance and antenna-feedline systems, this option provides both fault location and structural return loss capability. Fault-location measurements help identify where cable or system faults, such as bends, shorts, or corroded or damaged connectors, occur.
8712ET/ES and 8714ET/ES RF Network Analyzers 2 Adjustments Service Guide 2-1
Adjustments Introduction 8712ET/ES and 8714ET/ES RF Network Analyzers Introduction This chapter contains procedures to adjust the analyzer. Generally these adjustment procedures are only used when hardware has been replaced in the instrument, or if there is a failure in the operators check or the performance tests (see Chapter 1). Refer to Table 3-1, “Post Repair Procedures,” on page 3-23 to determine which adjustment procedures you need to do when a particular part has been replaced.
8712ET/ES and 8714ET/ES RF Network Analyzers Adjustments Introduction Required Equipment Table 2-1 Required Equipment for Adjustments Description HP/Agilent Model # 50Ω STD 75Ω Notes Power meter 437B, 438A E4418A, E4419A ✓ ✓ Power sensor, 50Ω 8482A Low power sensor 8481D or 8484A ✓ ✓ ✓ ✓ Cal kit type-N 50Ω 85032B Opt 0011 Cal kit type-N 75Ω 85036B 6 dB attenuator 50Ω 8491A/B/C Opt 006 ✓ — ✓ — ✓ — 10 dB attenuator 50Ω2 8491A/B/C Opt 010 ✓ — Required for adjustments only if analyz
Adjustments Correction Constants (CCs) Storage 8712ET/ES and 8714ET/ES RF Network Analyzers Correction Constants (CCs) Storage During normal operation, the network analyzer uses correction constants that are stored in the RAM buffer. When the analyzer's line power is switched on, the analyzer copies the current correction constants from the CPU EPROM into the RAM buffer. During the adjustment tests, the analyzer generates correction constants and saves them to the RAM buffer only.
8712ET/ES and 8714ET/ES RF Network Analyzers Adjustments Frequency Accuracy Adjustment Frequency Accuracy Adjustment In this adjustment, the frequency accuracy of the analyzer's source is calibrated by adjusting the 10 MHz internal reference clock.
Adjustments Frequency Accuracy Adjustment 8712ET/ES and 8714ET/ES RF Network Analyzers 2. Set the frequency counter input switches to the “10 Hz – 500 MHz” and 50Ω positions. 3. On the analyzer, press PRESET (see caution on page 2-2) FREQ CW 500 MHz MENU Trigger Hold . If the frequency counter reading is 500 MHz ±2500 Hz, you do not need to make this adjustment. However, you can still make this adjustment to improve the frequency accuracy. 4.
8712ET/ES and 8714ET/ES RF Network Analyzers Adjustments Set Serial Number, Adjustment #100 Set Serial Number, Adjustment #100 Adjustment #100 cannot be used to set an established serial number. The procedure outlined below can only be used to enter the serial number if the analyzer displays a default serial number value of ?????????? (ten question marks).
Adjustments Set Serial Number, Adjustment #100 8712ET/ES and 8714ET/ES RF Network Analyzers In Case of Difficulty If the analyzer displays an error message that tells you the serial number has the wrong format, check the rear-panel serial number tag again and verify that you have the correct serial number. If the analyzer displays an error message that tells you “Serial number already set,” it means that a serial number is already installed on that CPU board and therefore cannot be changed.
8712ET/ES and 8714ET/ES RF Network Analyzers Adjustments LO Power Correction, Adjustment #101 LO Power Correction, Adjustment #101 NOTE Service Guide Adjustment # 101 is not required for the 8712ET/ES or the 8714ET/ES. The adjustment may be performed but will not affect the operation of the instrument.
Adjustments Switched Gain Correction, Adjustment #102 8712ET/ES and 8714ET/ES RF Network Analyzers Switched Gain Correction, Adjustment #102 In this adjustment, the analyzer measures correction values for the switched gains in the Intermediate Frequency (IF) stages for each analyzer channel. The analyzer applies the corrected gains to the R, A, and B input channels to put the signal in the correct range for proper analog to digital converter (ADC) operation.
8712ET/ES and 8714ET/ES RF Network Analyzers Adjustments Switched Gain Correction, Adjustment #102 Warmup Time Allow the analyzer to warm up for one hour. Estimated Adjustment Time This adjustment takes approximately two minutes to perform. Procedure 1. Press PRESET SYSTEM OPTIONS Service Test and Adjustments Select Adjustment 102 ENTER Execute Test . 2. This is a fully automated adjustment handled by the internal firmware. Follow the instructions on the analyzer's display.
Adjustments External Detector Gain Correction, Adjustment #103 8712ET/ES and 8714ET/ES RF Network Analyzers External Detector Gain Correction, Adjustment #103 This adjustment generates correction constants for the receiver to make both external detector and internal broadband measurements. Perform this test whether or not you plan to use external detectors. In this test, an accurate ±0.5 V is provided to both the X and Y detector inputs by the voltage reference source.
8712ET/ES and 8714ET/ES RF Network Analyzers Figure 2-3 Adjustments External Detector Gain Correction, Adjustment #103 External Detector Connector, Front View Warmup Time Allow the analyzer to warm up for one hour. Estimated Adjustment Time This adjustment takes approximately two minutes to perform. Procedure 1. Press PRESET SYSTEM OPTIONS Service Test and Adjustments Select Adjustment 103 ENTER Execute Test . 2. This is a fully automated adjustment handled by the internal firmware.
Adjustments Auxiliary Input Correction, Adjustment #111 8712ET/ES and 8714ET/ES RF Network Analyzers Auxiliary Input Correction, Adjustment #111 This adjustment generates correction constants for the auxiliary input. The analyzer computes the offset and gain of the auxiliary input circuitry by measuring two voltages (0 and +10.000 DC volts) that are applied to the auxiliary input.
8712ET/ES and 8714ET/ES RF Network Analyzers Adjustments Source Power Correction, Adjustment #104 Source Power Correction, Adjustment #104 In this adjustment, the analyzer creates a table of values that corrects the source output power over different frequencies and power levels. For all ES models, separate tables of values are created for the forward and reverse direction through the device under test (DUT). The analyzer reads values from a power meter to determine the actual source output level.
Adjustments Source Power Correction, Adjustment #104 8712ET/ES and 8714ET/ES RF Network Analyzers Procedure Figure 2-4 Setup for Source Power Correction NOTE Before you begin this adjustment, you should store a copy of the correction constants in a disk file for later retrieval, if you have not done so already. 1. Switch the power meter on and let it warm up for at least five minutes. 2. Connect an GPIB cable between the analyzer and the power meter. Set the GPIB address of the power meter to 13.
8712ET/ES and 8714ET/ES RF Network Analyzers Adjustments Source Power Correction, Adjustment #104 a. Insert a formatted disk into the internal disk drive. b. Press SYSTEM OPTIONS Service Update Corr Const Store CC to Disk . This creates a file (or writes over an existing file) where the correction constants are stored.
Adjustments B Amplitude Correction, Adjustment #105 8712ET/ES and 8714ET/ES RF Network Analyzers B Amplitude Correction, Adjustment #105 This adjustment corrects the B narrowband input so that it displays a flat 0 dB trace with an input of 0 dBm from the analyzer's internal source. The results are stored in a correction table that is accessed during operation. For ES model analyzers, separate correction tables are created for the A input and the B input.
8712ET/ES and 8714ET/ES RF Network Analyzers Adjustments Reflection (One-Port) Correction, Adjustment #107 Reflection (One-Port) Correction, Adjustment #107 This adjustment corrects for errors in reflection measurements. The analyzer measures an open, a short, and a load to perform a one-port reflection calibration and then stores the values in a correction table. For all ES analyzers, separate correction tables are created for reflection corrections at PORT 1 and for reflection corrections at PORT 2.
Adjustments Transmission Correction, Adjustment #106 8712ET/ES and 8714ET/ES RF Network Analyzers Transmission Correction, Adjustment #106 This adjustment performs a transmission response calibration to correct for frequency response in narrowband B/R measurements. It is recommended that you use a short-length, high quality cable to perform this adjustment.
8712ET/ES and 8714ET/ES RF Network Analyzers Adjustments B* Amplitude Correction, Adjustment #110 B* Amplitude Correction, Adjustment #110 In this adjustment, correction data is generated to calibrate the internal broadband B* channel detector for accuracy and power at 30 MHz. Required Equipment Recommended HP/Agilent Model or Part Number Equipment Description Type-N cable 20 dB attenuator2 For 50Ω Analyzers For 75Ω Analyzers 8120-4781 or 8120-2408 or 8120-64691 8120-64681 8491A Opt.
Adjustments B* Amplitude Correction, Adjustment #110 8712ET/ES and 8714ET/ES RF Network Analyzers Procedure 1. Press PRESET SYSTEM OPTIONS Service Test and Adjustments Select Adjustment 110 ENTER Execute Test . 2. This is a fully automated adjustment handled by the internal firmware. Follow the instructions on the analyzer's display. The analyzer presets after the test is done. 3. If you are not going to make any more adjustments, press Service Update Corr Const Store CC to EPROM . a.
8712ET/ES and 8714ET/ES RF Network Analyzers Adjustments R* Amplitude Correction, Adjustment #108 R* Amplitude Correction, Adjustment #108 This adjustment generates correction constants to improve absolute power accuracy in R* measurements. (Frequency effects are corrected in “R* Frequency Response Correction, Adjustment #109.
Adjustments R* Amplitude Correction, Adjustment #108 8712ET/ES and 8714ET/ES RF Network Analyzers b. Press SYSTEM OPTIONS Service Update Corr Const Store CC to Disk . This creates a file (or writes over an existing file) where the correction constants are stored.
8712ET/ES and 8714ET/ES RF Network Analyzers Adjustments R* Frequency Response Correction, Adjustment #109 R* Frequency Response Correction, Adjustment #109 This adjustment corrects for frequency response errors in R* measurements. You must perform adjustment #108 (R* amplitude correction) before running the R* frequency response correction adjustment.
8712ET/ES and 8714ET/ES RF Network Analyzers 3 Assembly Replacement Service Guide 3-1
Assembly Replacement Introduction 8712ET/ES and 8714ET/ES RF Network Analyzers Introduction This chapter describes how to disassemble and reassemble your analyzer for the purpose of replacing a failed assembly. It also contains specific instructions for replacing each assembly. A section on ordering parts, “How to Order Parts” on page 3-24, is included at the end of this chapter. NOTE Some individual components of each assembly may also be replaced.
8712ET/ES and 8714ET/ES RF Network Analyzers Assembly Replacement Assembly Removal/Replacement Procedures Assembly Removal/Replacement Procedures The following sections describe how to remove your analyzer's major assemblies: • “A1 Front Panel Assembly Replacement” on page 3-4 • “A2 CPU Board Assembly Replacement” on page 3-6 • “A3 Fractional-N/Reference Assembly Replacement” on page 3-10 • “A4 Source Assembly Replacement” on page 3-11 • “A5 Receiver Assembly Component Replacement” on page 3-13
Assembly Replacement A1 Front Panel Assembly Replacement 8712ET/ES and 8714ET/ES RF Network Analyzers A1 Front Panel Assembly Replacement The A1 assembly comes in two different versions for both the ET and ES models: 50Ω and 75Ω. However, the difference is only cosmetic. Both assemblies have all the front panel components including frame, keyboard, keypad, and knob.
8712ET/ES and 8714ET/ES RF Network Analyzers Assembly Replacement A1 Front Panel Assembly Replacement 4. Pull the front panel several inches away from the cabinet. 5. Disconnect the ribbon cable from the circuit board. • If you are planning to remove the A3 (fractional-N), A4 (source), or A5 (receiver) assemblies, remove the handle nut plate on the right side. • If you are planning to remove the A6 (power supply) or the A7 (display) assemblies, remove the handle nut plate on the left side.
Assembly Replacement A2 CPU Board Assembly Replacement 8712ET/ES and 8714ET/ES RF Network Analyzers A2 CPU Board Assembly Replacement CAUTION Failure to follow instructions may result in an improperly operating analyzer. Make a copy of the correction constants (see Chapter 8) before replacing the A2 CPU assembly. Ensure that your analyzer's firmware disk is available before replacing the A2 CPU assembly.
8712ET/ES and 8714ET/ES RF Network Analyzers Assembly Replacement A2 CPU Board Assembly Replacement Figure 3-2. Location of the Anchoring Screw on the CPU Assembly 3. Remove the front panel assembly (see “Removing the Front Panel Assembly” on page 3-4). Remove both the nut plates on the left and right handles. 4. Remove the display assembly (see “Removing the Front Panel Assembly” on page 3-4). 5. Remove the CPU assembly from its cavity. 6.
Assembly Replacement A2 CPU Board Assembly Replacement 8712ET/ES and 8714ET/ES RF Network Analyzers Figure 3-3. Location of the BootROM Chip, U335 and Jumper J301 7. Transfer any modified (Single Inline Memory Module) SIMM: If the original board has a larger SIMM installed, transfer the larger SIMM to the new CPU assembly. NOTE As shipped from the factory, all analyzers have 32 MB of SIMM memory. To increase the amount of memory, remove the existing SIMM and replace it with a higher capacity SIMM. 8.
8712ET/ES and 8714ET/ES RF Network Analyzers Assembly Replacement A2 CPU Board Assembly Replacement NOTE In the unlikely event that the bootROM has failed, then the replacement board (which has the transferred bootROM installed) will also “fail.” A “minimum configuration” bootROM is included in the service kit to help isolate this type of failure. If it is proven that the bootROM has failed, contact your nearest Agilent Technologies sales or service office for assistance.
Assembly Replacement A3 Fractional-N/Reference Assembly Replacement 8712ET/ES and 8714ET/ES RF Network Analyzers A3 Fractional-N/Reference Assembly Replacement CAUTION Perform the following only at an approved ESD workstation. See Figure 4-1 on page 4-3. Removing the Fractional-N/Reference Assembly 1. Disconnect the power cord. 2. Remove the front panel assembly (see “Removing the Front Panel Assembly” on page 3-4). Remove the handle nut plate on the right side only. 3.
8712ET/ES and 8714ET/ES RF Network Analyzers Assembly Replacement A4 Source Assembly Replacement A4 Source Assembly Replacement NOTE The source board has a low frequency version (8712ET/ES) and high frequency version (8714ET/ES); make sure you have the proper board. CAUTION Perform the following only at an approved ESD workstation. See Figure 4-1 on page 4-3. Removing the Source Assembly 1. Disconnect the power cord. 2.
Assembly Replacement A4 Source Assembly Replacement 8712ET/ES and 8714ET/ES RF Network Analyzers Installing the Source Assembly CAUTION Be very careful when reconnecting the semirigid cables (items numbered 1 and 4 in Table 7-2 on page 7-4). They are not interchangeable. Ensure that one cable is not confused with the other. It is possible to force the wrong cable onto the wrong connector, resulting in damage to the connectors or the cables. Tighten to 10 in-lb of torque.
8712ET/ES and 8714ET/ES RF Network Analyzers Assembly Replacement A5 Receiver Assembly Component Replacement A5 Receiver Assembly Component Replacement The A5 receiver board is not intended to be replaced at the assembly level. The receiver assembly can be troubleshot down to module or component level. Instructions for replacing the module and components are included in this section. CAUTION Perform the following only at an approved ESD workstation. See Figure 4-1 on page 4-3.
Assembly Replacement A5 Receiver Assembly Component Replacement 8712ET/ES and 8714ET/ES RF Network Analyzers 5. Remove the front panel assembly (see “Removing the Front Panel Assembly” on page 3-4). Remove the handle nut plate on the right side only. 6. Two semirigid cables connect the A5 assembly to the A4 assembly. Completely loosen one nut on each cable where it connects to the A4 assembly, then separate the cable from the A4 assembly. 7. Grasp the handle tab and pull forward to release the assembly.
8712ET/ES and 8714ET/ES RF Network Analyzers Assembly Replacement A5 Receiver Assembly Component Replacement Installing the Receiver PC Board. NOTE If the receiver PC board is being replaced, an installation note may be included with the replacement board. When an installation note is included with the PC board, follow the instructions carefully. In some cases, a firmware upgrade for the network analyzer is required when replacing the receiver PC board.
Assembly Replacement A5 Receiver Assembly Component Replacement 8712ET/ES and 8714ET/ES RF Network Analyzers Installing the Coupler. 1. Make sure the new coupler is of the correct impedance (50Ω or 75Ω) for the analyzer. 2. Inspect all the connectors and the semirigid cables for damage. 3. Reverse the procedure used to remove the coupler. 4. Tighten the semirigid cable connectors to 10 in-lb of torque. Removing the Switch (ES Analyzers). 1.
8712ET/ES and 8714ET/ES RF Network Analyzers Assembly Replacement A5 Receiver Assembly Component Replacement 7. Lift the attenuator off of the PC board. Installing the Attenuator. 1. Inspect all the connectors and the semirigid cables for damage. 2. Reverse the procedure used to remove the attenuator. 3. Tighten the semirigid cable connectors to 10 in-lb of torque.
Assembly Replacement A5 Receiver Assembly Component Replacement 8712ET/ES and 8714ET/ES RF Network Analyzers Removing the Limiter (ET Analyzers). 1. One of the limiters is secured by a plastic clamp. The clamp has two arms that snap open and closed. To open the clamp, pull up on the end of the arm on top. 2. When removing a limiter from cabling, first loosen the nut that is captured on the limiter and disconnect that end of the limiter.
8712ET/ES and 8714ET/ES RF Network Analyzers Assembly Replacement A6 Power Supply Assembly Replacement A6 Power Supply Assembly Replacement The power supply is a single assembly. The only lower level part available for replacement is the cooling fan. CAUTION Perform the following only at an approved ESD workstation. See Figure 4-1 on page 4-3. Removing the Power Supply Assembly 1. Disconnect the power cord. 2. Remove the front panel assembly (see “Removing the Front Panel Assembly” on page 3-4).
Assembly Replacement A7 Display Assembly Replacement 8712ET/ES and 8714ET/ES RF Network Analyzers A7 Display Assembly Replacement The display consists of the CRT assembly and a matched circuit board. Both assemblies must be replaced at the same time. CAUTION Perform the following only at an approved ESD workstation. See Figure 4-1 on page 4-3. Removing the Display Assembly 1. Disconnect the power cord. 2. Remove SCREW 7 (two places) as indicated on the rear-panel label. 3.
8712ET/ES and 8714ET/ES RF Network Analyzers Assembly Replacement A7 Display Assembly Replacement Adjusting the Position of the CRT If the display does not seem to be level (the scan lines do not appear to be horizontal) after the display is replaced, the position of the CRT may need to be adjusted within the display enclosure. 1. Loosen the four nuts (one from each corner) that secure the CRT to the display enclosure. 2. Reposition the CRT. 3. Tighten the four nuts.
Assembly Replacement A8 Internal Disk Drive Assembly Replacement 8712ET/ES and 8714ET/ES RF Network Analyzers A8 Internal Disk Drive Assembly Replacement The disk drive must be replaced if it fails. However, before replacing the drive, try cleaning the drive with a suitable cleaning device, or by spraying it with clean compressed air. Most “failed” drives are only in need of a cleaning. CAUTION Perform the following only at an approved ESD workstation. See Figure 4-1 on page 4-3. Removing the 3.
8712ET/ES and 8714ET/ES RF Network Analyzers Assembly Replacement Post Repair Procedures Post Repair Procedures Table 3-1 describes the adjustments and performance tests that are required after one or more of the analyzer's assemblies are replaced. For detailed information on the verification tests, refer to Chapter 1; for detailed procedures on the adjustments, refer to Chapter 2.
Assembly Replacement How to Order Parts 8712ET/ES and 8714ET/ES RF Network Analyzers How to Order Parts To order parts, follow the steps below: 1. Locate and identify the part number from Chapter 7. 2. Identify the quantity of parts desired. 3. If in the United States, call the Direct Ordering Department at (800) 227-8164. NOTE The Direct Ordering Department is open Monday through Friday, from 6 am to 5 pm, Pacific Time.
8712ET/ES and 8714ET/ES RF Network Analyzers 4 Troubleshooting and Block Diagrams Service Guide 4-1
Troubleshooting and Block Diagrams Introduction 8712ET/ES and 8714ET/ES RF Network Analyzers Introduction This chapter is divided into four main, symptom-related sections. Refer to the section that best describes the problem you are observing, based on the results of your initial observation.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Introduction Figure 4-1 Example of an Antistatic Workstation • For disassembly procedures, see Chapter 3. WARNING Some parts in the analyzer have sharp edges. Work carefully to avoid injury. • Before replacing an assembly, inspect the board for obvious, easy-to-fix defects.
Troubleshooting and Block Diagrams Introduction 8712ET/ES and 8714ET/ES RF Network Analyzers • non-shielded display ribbon cable used to connect the display when the A2 CPU board is operated outside the chassis • voltage reference source used to perform several adjustments. The source provides ±0.5 V, ±24 mV, and +10 V supplies.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Introduction Figure 4-2 Connecting the Extender Board Initial Observations — Normal Power-up Sequence Prepare the analyzer for observation by performing these steps: 1. Disconnect all accessories and peripherals. 2. Remove the disk (if any) from the internal disk drive. 3. Connect a known-good cable between the RF OUT/PORT 1 and RF IN/PORT 2 ports. Switch on the analyzer and watch for the proper power-up sequence: 1.
Troubleshooting and Block Diagrams Introduction 8712ET/ES and 8714ET/ES RF Network Analyzers Press PRESET (see the caution on page 4-2). The display should show a flat line about 0 dB. If it does not, ensure that the cable connecting the RF OUT/PORT 1 port to the RF IN/PORT 2 port is good and securely connected. If the analyzer will not switch on, check the AC line power. Make sure that the line voltage selector switch (located below the AC power plug) is set correctly. Check the fuse.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Category 1 Failures: Dead or No Display Category 1 Failures: Dead or No Display This category of failure usually involves one of the following: • defective A6 power supply • defective A2 CPU • poor contact with the rear plane connector board • digital failure in any board assembly • defective display Troubleshooting the Power Supply Assembly (A6) Begin here if the problem appears to be power supply related.
Troubleshooting and Block Diagrams Category 1 Failures: Dead or No Display 8712ET/ES and 8714ET/ES RF Network Analyzers 5. If the green LED is on, and the red LED is blinking The power supply is in shutdown. Remove the power supply/display assembly from analyzer, plug it in and switch the analyzer's line power on. a. If the red LED is still blinking Replace the power supply. b.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Category 1 Failures: Dead or No Display 2. If the voltages are correct, but there is a probe power problem Remove the front panel and check the fuses on the back of the front-panel PC board. Continue with the section “Troubleshooting Digital Group Problems”.
Troubleshooting and Block Diagrams Category 1 Failures: Dead or No Display 8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting Digital Group Problems Error During Power-up 1. If there is no beep at power-up, but the CRT display is normal The problem is probably in the sound generator or speaker on the CPU board. Check the sound generator ICs (U500-U503, U515-U517, and U300) and the speaker (LS501), or replace the CPU board (refer to “Removing the CPU Board Assembly” on page 3-6). 2.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Category 1 Failures: Dead or No Display 5. If an error occurs while firmware is being loaded (after 2 beeps are heard) Reload the firmware from disk by inserting the firmware disk into the internal disk drive and switching the analyzer's line power on. Press BEGIN at the Load firmware? query. The process will take a few minutes. Watch the CRT for information during the loading procedure.
Troubleshooting and Block Diagrams Category 1 Failures: Dead or No Display NOTE 8712ET/ES and 8714ET/ES RF Network Analyzers Not all error messages are listed in the table. Many error messages describe the problem clearly and require no further explanation, so they are not included in this guide. Some error messages are only partially reproduced, because the remainder of the message is specific to the error (e.g., provides address at which the failure occurred).
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Category 1 Failures: Dead or No Display Table 4-1 Analyzer Self-Tests Test 1 Test Name 680x0 Processor Applicable Error Messages and Notes Errors begin with “CPU TEST FAIL.” Remove CPU board, and check U105, U106, and TP103 (CPU clock). Then check U121 and U122. If test still fails, replace CPU board. 2 BootROM Checksum Errors: Bad checksum table at … ROM Checksum Failure in bank… Checksum Table is Blank.
Troubleshooting and Block Diagrams Category 1 Failures: Dead or No Display Test Test Name 8712ET/ES and 8714ET/ES RF Network Analyzers Applicable Error Messages and Notes 8 (number not used) Test number not used because test status LED powers up with this as default. An “8” on the LED indicates the 68030 was unable to power-up and execute basic instructions. Check power supplies. If power supplies are good, then replace CPU board. 9 DSP SRAM Errors: same as for test #4.
8712ET/ES and 8714ET/ES RF Network Analyzers Test 15 16 Test Name Troubleshooting and Block Diagrams Category 1 Failures: Dead or No Display Applicable Error Messages and Notes CPU Support Circuitry Errors: Stuck interrupt. Analog Bus Errors: CPU +5 V supply is out of range! Vpp Flash Supply is out of range! Tests interrupt circuitry. Replace CPU board, or check U106, U109, and U110. Tests analog bus ADC on CPU board.
Troubleshooting and Block Diagrams Category 1 Failures: Dead or No Display Test 22 8712ET/ES and 8714ET/ES RF Network Analyzers Test Name DIN Keyboard Interface Applicable Error Messages and Notes Errors: DIN Keyboard test FAILED Problem with DIN Keyboard Power Supply! Check Fuse. Tests DIN keyboard control portion of the Super I/O. Replace CPU board or check Super I/O chip, U607, or its clock, U606. 23 Centronics Interface Errors: Centronics port test FAILED. Strobe bit error.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Category 1 Failures: Dead or No Display Front Panel Problems If the analyzer appears to power-up normally but will not respond to keystrokes, verify that none of the keys are stuck. If the front panel keys are still not responding properly, remove the front panel and make sure the ribbon cable is properly connected between the front panel assembly and the CPU. Inspect the keypad and the PC board.
Troubleshooting and Block Diagrams 8712ET/ES and 8714ET/ES Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional RF Network Analyzers Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional This section is divided into three parts. The first two parts contain separate sections to troubleshoot the ET and ES analyzers in a step-by-step process.
8712ET/ES and 8714ET/ES Troubleshooting and Block Diagrams RF Network Analyzers Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional NOTE Refer to Chapter 7 for detailed part lists and assembly drawings. Steps Associated with Figure 4-4 1. Leave the RF OUT and RF IN ports open. 2. Set the analyzer to the default condition by pressing PRESET POWER 0 dBm . 3. Observe the traces at each detector and compare to the normal signal trace levels in Figure 4-4.
Troubleshooting and Block Diagrams 8712ET/ES and 8714ET/ES Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional RF Network Analyzers Steps Associated with Figure 4-5 1. Connect a thru cable between RF OUT and RF IN. 2. Press MEAS 1 Transmissn . 3. Observe the traces at each detector and compare to the normal signal trace levels in Figure 4-5. Press Detection Options in the MEAS 1 menu. For narrowband traces, press Narrowband Internal and A , B , or R keys.
8712ET/ES and 8714ET/ES Troubleshooting and Block Diagrams RF Network Analyzers Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional Testing the DSP Circuit To check the DSP circuit, substitute the receivers’s ADC clock and data signals with similar signals created on the CPU board. 1. Turn off the analyzer and remove the CPU board (refer to “Removing the CPU Board Assembly” on page 3-6). 2.
Troubleshooting and Block Diagrams 8712ET/ES and 8714ET/ES Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional RF Network Analyzers Symptom 4: R and R* Traces Are Always Below −10 dBm or Noisy If other traces are normal, something in the R signal path could be damaged. 1. Check the power out of the coupled port on the R coupler. a. If the power level is below −20 dBm, replace the R coupler (refer to “Removing the Coupler” on page 3-15). b.
8712ET/ES and 8714ET/ES Troubleshooting and Block Diagrams RF Network Analyzers Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional Symptom 9: B Trace Is Normal and B* Trace Is Noisy OR the B Trace Is Noisy and the B* Is Normal This failure is very similar to symptom 8, however this failure points to the B or B* detectors on the receiver PC board. 1. Replace the receiver PC board from the receiver assembly (A5). (Refer to “Removing the Receiver PC Board” on page 3-14.
Troubleshooting and Block Diagrams 8712ET/ES and 8714ET/ES Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional RF Network Analyzers Steps Associated with Figure 4-6 1. Leave PORT 1 and PORT 2 open. 2. Set the analyzer to the default condition by pressing PRESET POWER 0 dBm . 3. Observe the traces for each detector and compare to the normal signal trace levels in Figure 4-6. Press Detection Options in the MEAS 1 menu.
8712ET/ES and 8714ET/ES Troubleshooting and Block Diagrams RF Network Analyzers Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional Steps Associated with Figure 4-7 1. Connect a thru cable between PORT 1 and PORT 2. 2. Press MEAS 1 S21 Fwd Trans . 3. Observe the traces for each detector and compare to the normal signal trace levels in Figure 4-7. Press Detection Options in the MEAS 1 menu. For narrowband traces, press Narrowband Internal and A , B , or R keys.
Troubleshooting and Block Diagrams 8712ET/ES and 8714ET/ES Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional RF Network Analyzers Steps Associated with Figure 4-8 1. Leave on or connect a thru cable PORT 1 and PORT 2. 2. Press MEAS 1 S12 Rev Trans . 3. Observe the traces for each detector and compare to the normal signal trace levels in Figure 4-8. Press Detection Options in the MEAS 1 menu. For narrowband traces, press Narrowband Internal and A , B , or R keys.
8712ET/ES and 8714ET/ES Troubleshooting and Block Diagrams RF Network Analyzers Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional Testing the DSP Circuit To check the DSP circuit, substitute the receivers’s ADC clock and data signals with similar signals created on the CPU board. 1. Turn off the analyzer. To remove the CPU board, refer to “Removing the CPU Board Assembly” on page 3-6. 2.
Troubleshooting and Block Diagrams 8712ET/ES and 8714ET/ES Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional RF Network Analyzers Symptom 4: R and R* Traces Are Always Below −10 dBm or Noisy If other traces are normal, something in the R signal path could be damaged. 1. Check the power level out of the coupled port on the R coupler. a. If the power level is below −20 dBm, replace the R coupler (refer to “Removing the Coupler” on page 3-15). b.
8712ET/ES and 8714ET/ES Troubleshooting and Block Diagrams RF Network Analyzers Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional Symptom 8: R Trace Is Normal and R* Trace Is Noisy OR the R Trace Is Noisy and the R* Trace Is Normal This failure can be isolated to the R or R* detectors and points to the receiver PC board in receiver assembly (A5). 1. Replace the receiver PC board from the receiver assembly (A5). (Refer to “Removing the Receiver PC Board” on page 3-14.
Troubleshooting and Block Diagrams 8712ET/ES and 8714ET/ES Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional RF Network Analyzers General Troubleshooting for Both ET and ES Models This section describes further troubleshooting practices for both the ET and ES analyzers. The focus of this section is a more detailed look at the fractional-N/referecnce board assembly (A3), the source board assembly (A4) and the ADC check for the receiver board assembly (A5).
8712ET/ES and 8714ET/ES Troubleshooting and Block Diagrams RF Network Analyzers Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional 8712ET/ES Source Frequency 1.3 GHz 8714ET/ES Fractional-N Frequency Source Frequency Fractional-N Frequency 56.875 MHz 1.3 GHz 49.762587 MHz 2.0 GHz 43.336806 MHz 3.0 GHz 57.008681 MHz 2. If one of the fractional-N outputs is not correct, press MENU Spur Avoid Options .
Troubleshooting and Block Diagrams 8712ET/ES and 8714ET/ES Category 2 Failures: No Error Messages but One or More Measurements Are Nonfunctional RF Network Analyzers Checking the LO Output Now check the LO output from the source at A4J1. Use the same conditions as above. 1. Measure the LO when the RF out is set to 50 MHz. The LO should always be 27.778 kHz above the RF signal. Repeat for 3000 MHz (1300 MHz for 8712ET/ES). Power levels for the LO should be in the +2.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Category 3 Failures: Inaccurate (but reasonably functional) Measurements Category 3 Failures: Inaccurate (but reasonably functional) Measurements Troubleshooting Inaccurate Data Mechanical Problems Check adapters, cables, and test port connectors for damage. Gauge the test port connectors. Ensure that the cables between the source (A4) and receiver (A5) assemblies are properly connected.
Troubleshooting and Block Diagrams Category 3 Failures: Inaccurate (but reasonably functional) Measurements 8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting Trace Drift for ET Models. To check the uncorrected performance of the analyzer, follow the steps below. Refer to Figure 4-4 on page 4-19 and Figure 4-5 on page 4-20 for the part designators. Checking the Uncorrected Directivity of the RF OUT Coupler 1. Set the analyzer to the default condition by pressing PRESET 2.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Category 3 Failures: Inaccurate (but reasonably functional) Measurements Troubleshooting Trace Drift for ES Models. To check the uncorrected performance of the analyzer, follow the steps below. Refer to Figure 4-6 on page 4-24, Figure 4-7 on page 4-25, and Figure 4-8 on page 4-26 for part designators. Checking the Uncorrected Directivity of the PORT 1, PORT 2, and the R Couplers 1.
Troubleshooting and Block Diagrams Category 3 Failures: Inaccurate (but reasonably functional) Measurements 8712ET/ES and 8714ET/ES RF Network Analyzers Checking the Switch Terminations 1. Remove the load and connect a a high quality thru cable between PORT 1 and PORT 2. 2. If the max point of the S22 trace is above −12 dB, there is a port match problem in the PORT 1 path. The most likely cause is a defective load in the switch.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Category 3 Failures: Inaccurate (but reasonably functional) Measurements RF Power Problems Check all cables and cable connections on the receiver board; tighten if necessary. If the problem is caused by a power hole, try moving the cables to see if the power hole moves or disappears. If it does, the cable is probably defective.
Troubleshooting and Block Diagrams Category 4 Failures: Peripheral Device Problems 8712ET/ES and 8714ET/ES RF Network Analyzers Category 4 Failures: Peripheral Device Problems DIN Keyboard If a DIN keyboard interface test failure was reported during power-up, there may be a problem with the +5 V power supply for the DIN keyboard. Verify that the keyboard is connected properly. (If necessary, use a DIN (f) to mini-DIN (m) adaptor.) Make sure that the keyboard is compatible with the analyzer.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Category 4 Failures: Peripheral Device Problems Centronics (Parallel) Printers and Plotters If a Centronics interface problem is indicated during power-up (with no peripheral connected), there may be a problem with the Centronics interface portion of the Super I/O (U607). Replace the CPU board (refer to “Removing the CPU Board Assembly” on page 3-6).
Troubleshooting and Block Diagrams Category 4 Failures: Peripheral Device Problems 8712ET/ES and 8714ET/ES RF Network Analyzers General Checks for GPIB Systems If the analyzer does not respond to an external controller, verify that the analyzer is in talker/listener mode by pressing SYSTEM OPTIONS GPIB . The analyzer cannot respond if it is in system-controller mode. Make sure the controller is using the proper select code and addresses. Be sure GPIB cable length limits are not exceeded.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Category 4 Failures: Peripheral Device Problems 3. Make sure the LAN is enabled by pressing SYSTEM OPTIONS LAN LAN State ON off . If the state was previously off, then it is necessary to cycle the power again before the LAN will function. 4. Find and note the IP address of another working LAN device on the same network. Make sure this device is turned on, connected, and is functioning properly. 5.
Troubleshooting and Block Diagrams Category 4 Failures: Peripheral Device Problems 8712ET/ES and 8714ET/ES RF Network Analyzers Testing between Two Analyzers The ability of the analyzer's LAN to function can be easily tested by connecting two analyzers together using a short length of cable with two RJ-45 connectors on each end. However, a “crossover” cable must be used in order for this to work.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Category 4 Failures: Peripheral Device Problems Figure 4-9 Construction of a Cross-Over Cable 3. Insulate all exposed wires so they cannot short together. Label this as a crossover cable so it cannot be confused with normal cable. Set the IP addresses on two analyzers. The addresses can be set to anything, but they must be different. Make sure the subnet mask and gateway addresses are set to 0.0.0.
Troubleshooting and Block Diagrams Category 4 Failures: Peripheral Device Problems 8712ET/ES and 8714ET/ES RF Network Analyzers If possible, eliminate the possibility of a defective analyzer by substitution of a known working unit. Once the analyzer has been proven to be working properly, concentration can be placed on the network itself. Below is a list of LAN cables available. For information ordering replacement parts, see “How to Order Parts” on page 3-24.
8712ET/ES and 8714ET/ES RF Network Analyzers Troubleshooting and Block Diagrams Category 4 Failures: Peripheral Device Problems Figure 4-12 8712ET/ES A4 Source Board Service Guide 4-47
Troubleshooting and Block Diagrams Category 4 Failures: Peripheral Device Problems 8712ET/ES and 8714ET/ES RF Network Analyzers Figure 4-13 8714 ET/ES A4 Source Board 4-48 Service Guide
8712ET/ES and 8714ET/ES RF Network Analyzers 5 Service Related Menus Service Guide 5-1
Service Related Menus Introduction 8712ET/ES and 8714ET/ES RF Network Analyzers Introduction This chapter describes the functions of the service key menus. Each section title is a selection in the service menu, and under these titles are the related soft keys. These menus are used to test, verify, adjust, control, and troubleshoot the analyzer. Internal diagnostics and adjustments include self-tests and adjustment tests.
8712ET/ES and 8714ET/ES RF Network Analyzers Service Related Menus Introduction Figure 5-1 Service Key Menus Service Guide 5-3
Service Related Menus Tests and Adjustments Menu 8712ET/ES and 8714ET/ES RF Network Analyzers Tests and Adjustments Menu Select Self-Test : Allows you to select a diagnostic self-test. Tests may be selected by entering the number of the test with the keypad, or using the front-panel knob or ⇑ ⇓ keys to scroll through the list of tests. The number, description, and test status of the currently selected test are shown. Possible test status notations are: “PASSED,” “FAILED,” and “NOT DONE.
8712ET/ES and 8714ET/ES RF Network Analyzers Service Related Menus Select Self-Test Menu Select Self-Test Menu Internal tests can be used in troubleshooting the analyzer. Only the ones marked with an asterisk in Table 5-1 are executed during the power-up sequence. The pass/fail status of these tests can be checked by scrolling through the list of self-tests.
Service Related Menus Select Self-Test Menu Test Number 8712ET/ES and 8714ET/ES RF Network Analyzers Test Name Description *13 Non-volatile SRAM Tests the integrity of the contents of battery-backed SRAM. Detects loss of power to the SRAM. *14 Digital IF Control Tests the operation of the LAN circuitry. 15 CPU Support Circuitry Tests various circuits that are required for the main processor (68030) to operate. Tests timers and interrupts. Attempts to clear and disable all interrupts.
8712ET/ES and 8714ET/ES RF Network Analyzers Test Number Test Name Service Related Menus Select Self-Test Menu Description 31 DIN Keyboard Port Prompts user to connect a DIN keyboard. Displays feedback on detected key presses. 32 GPIB Port Prompts user to disconnect GPIB cable. Tests GPIB hardware. Prompts user to connect a printer, and then sends characters to the port. 33 Test TTL Pass/Fail Bit Test Prompts user to disconnect cable and then tests the hardware.
Service Related Menus Select Adjustment Menu 8712ET/ES and 8714ET/ES RF Network Analyzers Select Adjustment Menu Adjustments generate correction constants (CCs) which compensate for the hardware performance of the analyzer. Correction constants are stored in segmented flash EPROMs along with the firmware. The data is copied to RAM during power-up. Running an adjustment test modifies the data in RAM, but it does not alter the data in EPROM.
8712ET/ES and 8714ET/ES RF Network Analyzers Service Related Menus Select Adjustment Menu Table 5-2 Analyzer Adjustments Adjustment Number Title Comments 100 Set Serial Number Not implemented; serial numbers can only be set over GPIB. Indicates “Not Done” if there is no serial number; indicates “Passed” when a serial number is resident. 101 LO Power Correction Not required.
Service Related Menus Instrument Info 8712ET/ES and 8714ET/ES RF Network Analyzers Instrument Info Displays a window with the following information: • Analyzer model and firmware revision • BootROM version • Analyzer serial number • Installed options • System impedance • Installed memory 5-10 Service Guide
8712ET/ES and 8714ET/ES RF Network Analyzers Service Related Menus Update Corr Const Menu Update Corr Const Menu For a complete description of when and how to use these keys, refer to “Storing and Recalling Correction Constants (CC)” on page 8-2. The following is a brief description. Install CC From Disk : Loads permanent copy of correction constant data from disk to EPROM.
Service Related Menus Service Utilities Menu 1 8712ET/ES and 8714ET/ES RF Network Analyzers Service Utilities Menu 1 This menu allows manual control of several sections of the A4 source and A5 receiver assemblies. This can be a helpful tool in troubleshooting these circuits. CAUTION Most of these utilities are for factory use only. Modification of any values or settings can result in improper operation or inaccurate results.
8712ET/ES and 8714ET/ES RF Network Analyzers Table 5-3 Service Related Menus Service Utilities Menu 1 Contents of the Correction Constant Storage Arrays Array Number Typical Correction Description Comments 0 One-port Directivity < 10 dB (8714ET/ES) < −5 dB (8712ET/ES) This data is related to the raw directivity of the reflection port coupler (but does not equal it). 1 One-port Source Match < −14 dB This represents the source match of the reflection port.
Service Related Menus Service Utilities Menu 1 Array Number 5-14 Description 8712ET/ES and 8714ET/ES RF Network Analyzers Typical Correction Comments 38 B* Diode Slope See Comments. A typical trace will be flat for the first and last few divisions. This trace represents the change in slope of power-in vs. voltage out. The slope is constant (zero) for both the log and linear portions of the diode curve. Only the transitional area will show something other than a flat line.
8712ET/ES and 8714ET/ES RF Network Analyzers Service Related Menus Meas Cal Options Menu Meas Cal Options Menu The analyzer uses arrays of calibration data to improve the measurements made by the hardware. This menu allows you to disable the calibration, and view the calibration data arrays. Meas Cal ON off : Allows the cal arrays to be used in processing measurement data. This function controls both the user-performed calibrations and the default factory cal.
Service Related Menus Analog Bus Menu 8712ET/ES and 8714ET/ES RF Network Analyzers Analog Bus Menu The analyzer has an analog bus that can be used to troubleshoot hardware problems on some of the boards in the analyzer. This is done by sampling analog bus nodes, which provide measurements at selected points on the boards. Nominal values for each node are provided in Table 5-4. Select Node : Allows you to select an analog bus node to be measured.
8712ET/ES and 8714ET/ES RF Network Analyzers Number 7 Service Related Menus Analog Bus Menu Name Description ALC PIN modulator Voltage to ALC PIN modulator on the source board. This value increases as the source power increases. Normal values range from 3.0 to 10.5 volts. A5 Receiver Assembly Nodes 8 +5 V on RCVR +5 V power supply on the receiver board. Normal values are 4.5 to 5.5 DC volts. 9 +15 V on RCVR +15 V power supply on the receiver board. Normal values are 13.5 to 16.5 DC volts.
Service Related Menus Analog Bus Menu Number 8712ET/ES and 8714ET/ES RF Network Analyzers Name Description 22 −15 V Supply Normal values are −16.5 to −13.5 DC volts 23 +12 V Supply Normal values are +13.5 to +10.5 DC volts. A2 CPU Assembly Nodes 5-18 24 +5 V on CPU +5 V power supply on the CPU board. Normal values are +4.5 to +5.5 volts. 25 +12 V Flash Prog Voltage +12 V Vpp supply for writing to the flash EPROM on the CPU board.
8712ET/ES and 8714ET/ES RF Network Analyzers Service Related Menus Service Utilities Menu 2 Service Utilities Menu 2 ALC DAC : Allows manual adjustment of the Automatic Level Control (ALC) DAC, which controls the source output (“RF OUT” or “PORT1”connector) power level. Disables the ALC power calibration until a power level is entered using the Power menu. Attenuator : Allows manual control of the internal step attenuator, if one is installed.
Service Related Menus Service Utilities Menu 3 8712ET/ES and 8714ET/ES RF Network Analyzers Service Utilities Menu 3 Multiport TsetControl : When the analyzer has been configured to use an external test set, this key accesses a menu to control the ports of an 87075C or other multiport test set. Data-Mem : This key subtracts a data trace stored in memory from the displayed data trace. To store a displayed data trace in memory, press DISPLAY Data->Mem . Freq Annot Use Percnt : For Service Use Only.
8712ET/ES and 8714ET/ES RF Network Analyzers Service Related Menus View Array Master Menu /View Array Interpol Menu View Array Master Menu /View Array Interpol Menu These keys allow you to view the actual calibration data arrays that are currently in use. The arrays are copied into a memory trace for easy analysis. This allows you to scale them, and use markers to read out actual values. Directivity : Displays the directivity cal array as a memory trace.
Service Related Menus Miscellaneous Service Functions 8712ET/ES and 8714ET/ES RF Network Analyzers Miscellaneous Service Functions Clearing Nonvolatile Memory (SRAM) This is also referred to as “zeroing” the nonvolatile SRAM, because the procedure causes the analyzer to write zeroes into the nonvolatile SRAM locations in memory. Note that this will erase any files saved to internal memory (non-vol RAM disk). This will not affect correction constants. 1. Cycle the analyzer's power. 2.
8712ET/ES and 8714ET/ES RF Network Analyzers Service Related Menus GPIB Command Reference for Service GPIB Command Reference for Service Some of the service menu keys have equivalent remote GPIB commands. The analyzer uses the SCPI programming language. For more information about SCPI and GPIB, refer to the “GPIB Programming” section of the Programers Guide. Service-related SCPI commands are listed in the following sections.
Service Related Menus GPIB Command Reference for Service Table 5-5 8712ET/ES and 8714ET/ES RF Network Analyzers Softkey SCPI Commands Keystrokes SCPI Command Tests and Adjustments Menu Select Self-Test TEST:SEL Select Adjustment TEST:SEL Execute Test TEST:STAT RUN TEST:STAT STOP Stop Test Meas Cal Options Menu Meas Cal ON off SENS[1|2]:CORR[:STAT] Update Corr Const Menu Store CC to Disk DIAG:CCON:STOR:DISK Store CC to EPROM DIAG:CCON:STOR:EEPR Load CC from Disk
8712ET/ES and 8714ET/ES RF Network Analyzers Service Related Menus GPIB Command Reference for Service Table 5-6 Alphabetical SCPI Command Summary Command Form Description DIAGnostic:BANDcross [:STATe] NR1 (8714ET/ES only) Turns bandswitching on or off. DIAGnostic:CCONstants:COPY Command Copies correction constants from EPROM to RAM. DIAGnostic:CCONstants:DEFaults Command Restores the default correction constants to EPROM and RAM.
Service Related Menus GPIB Command Reference for Service Command 8712ET/ES and 8714ET/ES RF Network Analyzers Form Description TEST:STATe CHAR Selects the state of the active adjustment or self-test. Choose from RUN|CONTinue|STOP. Query response will be NULL|PAUS|DONE. TEST:VALue NR1 Sets or queries a value for an adjustment or self-test. *TST? Query NR1 Returns the result of a complete selftest. An ASCII 0 (zero) indicates no failures found.
8712ET/ES and 8714ET/ES RF Network Analyzers 6 Theory of Operation Service Guide 6-1
Theory of Operation Introduction 8712ET/ES and 8714ET/ES RF Network Analyzers Introduction This chapter begins with a general description of the operation of the network analyzer system. This is followed by more detailed discussion of the operating theory of functional groups within the network analyzer. The operation of each group is described briefly, to the assembly level only. Detailed component-level circuit theory is not provided here.
8712ET/ES and 8714ET/ES RF Network Analyzers Theory of Operation System Theory System Theory The analyzer integrates a synthesized RF source with built-in couplers for signal separation, a combination narrowband and broadband receiver, and a display. Figure 6-1 and Figure 6-2 show the simplified system block diagrams of the ET and ES analyzer models. In the analyzer, the fractional-N/reference (A3) and source (A4) assemblies provide the synthesized RF source output.
Theory of Operation System Theory 8712ET/ES and 8714ET/ES RF Network Analyzers Figure 6-1 Simplified Block Diagram of the ET Model Analyzers 6-4 Service Guide
8712ET/ES and 8714ET/ES RF Network Analyzers Theory of Operation System Theory Figure 6-2 Simplified Block Diagram of the ES Model Analyzers Service Guide 6-5
Theory of Operation System Theory 8712ET/ES and 8714ET/ES RF Network Analyzers Power Supply (A6) The power supply group consists of the power supply assembly. This switching power supply provides regulated DC voltages to power all assemblies in the analyzer through a connection to the backplane. The backplane serves as a motherboard to provide power, data, and control signal connections to the various assemblies.
8712ET/ES and 8714ET/ES RF Network Analyzers Theory of Operation System Theory The TMS 34010 graphics system processor (GSP) is responsible for converting data from the CPU into video signals to drive the A7 display assembly. It also produces an external video output which is accessible from the rear panel and is VGA compatible. A number of processors on the CPU assembly allow the analyzer to interface with the outside world.
Theory of Operation System Theory 8712ET/ES and 8714ET/ES RF Network Analyzers 3.5" Internal Disk Drive Assembly (A8) The 3.5" disk drive is referred to by the analyzer as the internal disk. It accepts double density or high density 3.5" disks. It can read from either LIF or DOS format disks, but can only write to DOS disks. The analyzer can format disks only in DOS format (the LIF format is not supported).
8712ET/ES and 8714ET/ES RF Network Analyzers Theory of Operation System Theory 8712ET/ES Source Assembly (A4) The source assembly provides two output signals. One signal is the main source RF output signal which has a range of 0.3 to 1300 MHz. The other signal serves as the internal receiver local oscillator (LO) for downconverting narrowband signals. The two signals are independently phase-locked, and they are separated from one another by the receiver intermediate frequency (IF) of 27.778 kHz.
Theory of Operation System Theory 8712ET/ES and 8714ET/ES RF Network Analyzers The power level of the Source RF output is controlled by the firmware on the CPU board. The firmware digitally controls the level setting in the ALC/MODULATOR feedback loop. The firmware combines the desired output level with data from Adjustment #104 to determine the level settings for the ALC/MODULATOR feedback loop. (See Chapter 2, “Adjustments,” for more details on the adjustment procedure.
8712ET/ES and 8714ET/ES RF Network Analyzers Theory of Operation System Theory In band 1, below 1.91 GHz, the source is very similar to that of the 8712ET/ES. However, the fractional-N input is first divided by 7 instead of 4, the source LO is divided by 512 instead of 256, and the RF1 signal is 2339.777778 instead of 2340 MHz. The formula for a Fractional-N to RF output frequency is therefore: RFout = (Fractional-N × 512/7) − 2339.
Theory of Operation System Theory 8712ET/ES and 8714ET/ES RF Network Analyzers Receiver Assembly (A5) The theory of operation for the receiver is split into two sections that cover the ET models and the ES models. 8712ET and 8714ET Receiver Assembly The main function of the receiver assembly is to separate and measure signals associated with the DUT (device under test) and convert those signals to digital data for further processing on the CPU board.
8712ET/ES and 8714ET/ES RF Network Analyzers Theory of Operation System Theory RF Path of the ET Analyzer. The RF output signal from the source assembly passes through two directional couplers before going to the RF OUT front panel connector. As the source signal passes through the first coupler, part of the signal is routed to the R input on the receiver board to be used as a reference signal.
Theory of Operation System Theory 8712ET/ES and 8714ET/ES RF Network Analyzers Differences between 50Ω and 75Ω Analyzers. Connections for the DUT (RF OUT and RF IN) are available in both 50Ω and 75Ω versions. The two versions are identical except for the following: • the type-N connectors (RF OUT and RF IN) • the cable between the RF OUT connector and the directional coupler • The directional coupler connected to the RF OUT. The transition from 75Ω to 50Ω occurs within the directional coupler.
8712ET/ES and 8714ET/ES RF Network Analyzers Theory of Operation System Theory 8712ES and 8714ES Receiver Assembly The main function of the receiver assembly is to separate and measure signals associated with the DUT and convert those signals to digital data for further processing on the CPU board. The receiver assembly also routes the RF signal to the DUT. The ES receiver is capable of routing the source RF signal either direction through the DUT.
Theory of Operation System Theory 8712ET/ES and 8714ET/ES RF Network Analyzers RF Path of the ES Analyzer. NOTE The following description assumes the transfer switch position is set to provide output to the DUT through PORT 1 as pictured in Figure 6-5. The RF output signal from the source assembly is routed through a coupler, an attenuator, the transfer switch, and a second coupler before being output to the DUT at one of the front panel ports.
8712ET/ES and 8714ET/ES RF Network Analyzers 7 Parts List Service Guide 7-1
Parts List Analyzer Hardware 8712ET/ES and 8714ET/ES RF Network Analyzers Analyzer Hardware The analyzer has been designed to have a minimal number of different screw types. Most applications require one of only two screw types. All are TORX screws requiring a TORX driver (PN=pan head; FL=flat head). Listed below are all the required screws. For clarity, these are not listed on the following parts lists for each assembly.
8712ET/ES and 8714ET/ES RF Network Analyzers Parts List Specific Assembly and Cable Locations Specific Assembly and Cable Locations The following tables and figures describe the replaceable parts for each of the analyzer's major assemblies. For information on ordering replacement parts, see “How to Order Parts” on page 3-24.
Parts List Specific Assembly and Cable Locations 8712ET/ES and 8714ET/ES RF Network Analyzers Table 7-2 8712ET/ES and 8714ET/ES Major Assembly and Cable Locations Item HP/Agilent Part Number Quantity A1 Front panel assembly (removed) See Table 7-3 1 A2 CPU assembly (not shown) See Table 7-4 1 A3 Fractional-N/reference assembly See Table 7-5 1 A4 Source assembly A5 7-4 Description 1 8712ET/ES See Table 7-6 8714ET/ES See Table 7-7 Receiver assembly 1 8712/14ET See Table 7-8 871
8712ET/ES and 8714ET/ES RF Network Analyzers Parts List Specific Assembly and Cable Locations Table 7-3 A1 Front Panel Assembly and Cable Locations Item Description HP/Agilent Part Number Quantity Front panel assembly, ES models, 50Ωa 08714-60020 1 Front panel assembly, ES models, 75Ωa 08714-60021 1 Front panel assembly, ET models, 50Ωa 08714-60022 1 Front panel assembly, ET models, 75Ωa 08714-60023 1 Front frame 08712-40002 1 2 Keyboard assembly 08711-60101 1 3 Probe power socket
Parts List Specific Assembly and Cable Locations 8712ET/ES and 8714ET/ES RF Network Analyzers Table 7-4 A2 CPU Assembly and Cable Locations Item 1 Description HP/Agilent Part Number Quantity A2 CPU assembly (new) 08714-60175 A2 CPU assembly (R-E) 08714-69175 2 DRAM SIMM (72 pin) 32 MB 1818-5622 1 3 BNC jacks 1250-1842 4 4 Cable, ribbon, display assembly 8120-5526 1 5 Cable, ribbon, Front panel assembly 8120-5527 1 6 Cable, ribbon, 3.
8712ET/ES and 8714ET/ES RF Network Analyzers Parts List Specific Assembly and Cable Locations Table 7-5 A3 Fractional-N/Reference Assembly and Cable Locations Item 1 Description HP/Agilent Part Number Quantity A3 Fractional-N/reference circuit board assembly 08714-60171 A3 Fractional-N/reference circuit board assembly (R-E) 08714-69171 J6 external reference input jack, BNC 1250-1842 1 Hex nut for BNC jack (not shown) 2950-0054 1 Washer for BNC jack (not shown) 2190-0068 1 3 Shield, Bott
Parts List Specific Assembly and Cable Locations Table 7-6 8712ET/ES A4 Source Assembly and Cable Locations Item 1 8712ET/ES and 8714ET/ES RF Network Analyzers Description HP/Agilent Part Number Quantity A4 Source assembly (new) 08712-60076 A4 Source assembly (R-E) 08712-69076 2 Front shield (top) 08711-20022 1 3 Front shield (bottom) 08711-20023 1 4 Front shield gasket 08711-20043 2 5 Rear shield (top) 08711-20024 1 6 Rear shield (bottom) 08711-20025 1 7 Rear shield gasket
8712ET/ES and 8714ET/ES RF Network Analyzers Table 7-7 8714ET/ES A4 Source Assembly and Cable Locations Item 1 Parts List Specific Assembly and Cable Locations Description HP/Agilent Part Number Quantity A4 Source assembly 08713-60064 A4 Source assembly (R-E) 08713-69064 2 Front shield (top) 08713-20039 1 3 Front shield gasket (top) 08713-20028 1 4 Front shield (bottom) 08713-20041 1 5 Front shield gasket (bottom) 08713-20030 1 6 Rear shield (top) 08713-20040 1 7 Rear shield
Parts List Specific Assembly and Cable Locations 7-10 8712ET/ES and 8714ET/ES RF Network Analyzers Service Guide
8712ET/ES and 8714ET/ES RF Network Analyzers Table 7-8 8712ET and 8714ET A5 Receiver Assembly and Cable Locations Item 1 Parts List Specific Assembly and Cable Locations Description HP/Agilent Part Number Quantity A5 receiver PC board, for TR model 08714-60177 A5 receiver PC board, for TR model (R-E) 08714-69177 2 Adapter, SMA f to f 1250-1158 2 3 Cable, J1 (LO) to SMA to cable (Item 12) 08714-20033 1 4 Cable, J2 (R) to SMA to cable (Item 16) 08714-20032 1 5 Brace for cables 08714-0
Parts List Specific Assembly and Cable Locations 7-12 8712ET/ES and 8714ET/ES RF Network Analyzers Service Guide
8712ET/ES and 8714ET/ES RF Network Analyzers Table 7-9 8712ET and 8714ET Opt 1E1 A5 Receiver Assembly and Cable Locations Item 1 Parts List Specific Assembly and Cable Locations Description HP/Agilent Part Number Quantity A5 receiver PC board, for TR models 08714-60177 A5 receiver PC board, for TR models (R-E) 08714-69177 2 Adapter, SMA f to f 1250-1158 2 3 Cable, J1 (LO) to SMA to cable (Item 18) 08714-20033 1 4 Cable, J2 (R) to SMA to cable (Item 24) 08714-20032 1 5 Brace for cable
Parts List Specific Assembly and Cable Locations 7-14 8712ET/ES and 8714ET/ES RF Network Analyzers Service Guide
8712ET/ES and 8714ET/ES RF Network Analyzers Parts List Specific Assembly and Cable Locations Table 7-10 8712ES and 8714ES A5 Receiver Assembly and Cable Locations Item 1 Description Part Number Quantity A5 receiver PC board for S parameter models 08714-60002 A5 receiver PC board for S parameter models (R-E) 08714-69002 2 Adapter, SMA f to f 1250-1158 2 3 Cable, J1 (LO) to SMA to cable (Item 16) 08714-20033 1 4 Cable, J2 (R) to SMA to cable (Item 11) 08714-20032 1 5 Brace for cables
Parts List Specific Assembly and Cable Locations 8712ET/ES and 8714ET/ES RF Network Analyzers Table 7-11 A6 Power Supply Assembly and Cable Locations Item 1 Description HP/Agilent Part Number Quantity A6 power supply assembly (new) 0950-2201 A6 power supply assembly (R-E) 5062-3437 2 Fuse, 5 A, 250 V, time-lag (5 × 20 mm), N 2110-0709 1 3 Fan assembly 5062-3412 1 7-16 1 Service Guide
8712ET/ES and 8714ET/ES RF Network Analyzers Parts List Specific Assembly and Cable Locations Table 7-12 A7 Display Assembly and Cable Locations Item Description HP/Agilent Part Number Quantity 1 Display enclosure (sheet metal only) 08712-60010 1 2 CRT with board 2090-0558 1 3 Switch, intensity control, and cable assembly 08711-60165 1 4 Cable, display 20C w/headers 8120-5525 1 5 Lock washer 0.256 in. ID 2190-0067 1 6 Nut 1/4-36 2950-0216 2 7 Washer, flat 0.125 in.
Parts List Specific Assembly and Cable Locations 8712ET/ES and 8714ET/ES RF Network Analyzers Table 7-13 Cabinet Parts Description Chassis (includes connector board and labels) HP/Agilent Part Number 08712-60041 Power cord (varies by country, consult your representative) Front handle (2 per analyzer) 5063-9203 Front handle trim (2 per analyzer) 5041-9181 Front handle nut plate (2 per analyzer) 08711-00007 Screws for front handles (8 per analyzer) 0515-0943 Foot (4 per analyzer) 08712-40003 RFI
8712ET/ES and 8714ET/ES RF Network Analyzers Parts List Specific Assembly and Cable Locations Description HP/Agilent Part Number ACCESSORIES (continued) 75Ω type-N to 75Ω BNC assembly kit 11856A 75Ω type-N to type-F adapter kit 86211A 24-inch BNC test port cable (50Ω) 8120-1839 50Ω type-N, male-to-male test port cable (precision) 8120-8862 50Ω type-N, male-to-male test port cable (economy) 8120-6469 75Ω type-N, male-to-male test port cable (precision) 8120-8898 75Ω type-N, male-to-male test
Parts List Specific Assembly and Cable Locations 8712ET/ES and 8714ET/ES RF Network Analyzers Table 7-16 Upgrade Kits Description HP/Agilent Part Number 8712ET/ES and 8714ET/ES Firmware upgrade kit with Current Version 08714-60045 8712ET and 8714ET 50Ω Attenuator upgrade kit 08714-60043 8712ET and 8714ET 75Ω Attenuator upgrade kit 08714-60044 Option 100 (fault location and SRL) upgrade kit 08714-60046 Option 101 (fault location and SRL) upgrade kit with case 08714-60047 Table 7-17 Service Tool
8712ET/ES and 8714ET/ES RF Network Analyzers Parts List Specific Assembly and Cable Locations Table 7-18 Documentation Description HP/Agilent Part Number 8712ET/8714ET User's Guide 08714-90011 8712ES/8714ES User's Guide 08714-90012 8712ET/ES and 8714ET/ES LAN Interface User’s Guide Supplement 08714-90013 8712ET/ES and 8714ET/ES Automating Measurements User’s Guide Supplement 08714-90014 8712ET/ES and 8714ET/ES Programmer's Guide 08714-90015 8712ET/ES and 8714ET/ES Example Programs Guide 08714
8712ET/ES and 8714ET/ES RF Network Analyzers 8 Correction Constants and Firmware Service Guide 8-1
Correction Constants and Firmware Storing and Recalling Correction Constants (CC) 8712ET/ES and 8714ET/ES RF Network Analyzers Storing and Recalling Correction Constants (CC) NOTE Firmware and correction constants reside in segmented flash EPROMs. Because the EPROMs are segmented, it is possible to upgrade either firmware or correction constants independently.
8712ET/ES and 8714ET/ES RF Network Analyzers Correction Constants and Firmware Storing and Recalling Correction Constants (CC) analyzer should be kept in a safe place and write-protected so that it cannot be accidentally erased. Generally, this disk will never be needed unless the CPU assembly needs to be replaced. New correction constants can be generated by performing the built-in adjustment routines. (Refer to Chapter 2, “Adjustments,” for detailed information.
Correction Constants and Firmware Storing and Recalling Correction Constants (CC) 8712ET/ES and 8714ET/ES RF Network Analyzers Storing Correction Constants to EPROM This will copy the current contents of the analyzer's CC data that is contained in RAM to permanent storage in the EPROM. This procedure should be done when you are satisfied that the current correction constants in temporary RAM are complete and correct.
8712ET/ES and 8714ET/ES RF Network Analyzers Correction Constants and Firmware Upgrading or Re-Installing Firmware Upgrading or Re-Installing Firmware Firmware is contained on two high-density floppy disks which are in DOS format. Firmware disks are shipped with each analyzer. New firmware is released periodically as improvements are made. You should always keep at least one copy of firmware in a safe place because you cannot create firmware disks yourself. If you are upgrading from firmware revision E.
Correction Constants and Firmware Upgrading or Re-Installing Firmware 8712ET/ES and 8714ET/ES RF Network Analyzers Obtaining Firmware The current firmware revision may be ordered as a set of floppy disks from Agilent Technologies. See Table 7-14 on page 7-18 for the part number. The current firmware revision may also be downloaded, free of charge, through the internet. Go to the following URL: http://www.agilent.com From there, use the search funtion to search for 08714-60045.
8712ET/ES and 8714ET/ES RF Network Analyzers 9 Safety, Warranty, and Assistance Service Guide 9-1
Safety, Warranty, and Assistance Safety Symbols 8712ET/ES and 8714ET/ES RF Network Analyzers Safety Symbols The following safety symbols are used throughout this manual. Familiarize yourself with each of the symbols 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 instrument.
8712ET/ES and 8714ET/ES RF Network Analyzers Safety, Warranty, and Assistance General Safety Considerations General Safety Considerations Safety Earth Ground WARNING This is a Safety Class I product (provided with a protective earthing ground incorporated in the power cord). The mains plug shall only be inserted in a socket outlet provided with a protective earth contact. Any interruption of the protective conductor, inside or outside the instrument, is likely to make the instrument dangerous.
Safety, Warranty, and Assistance Lithium Battery Disposal 8712ET/ES and 8714ET/ES RF Network Analyzers Lithium Battery Disposal If the battery on the CPU Board (A2) becomes ready for disposal, dispose of it according to your country’s requirements. If required, you can return the battery to the nearest Agilent Technologies sales or service office (refer to Table 9-1 in this chapter) for disposal.
8712ET/ES and 8714ET/ES RF Network Analyzers Safety, Warranty, and Assistance Warranty Warranty NOTE The actual warranty on your instrument depends on the date it was ordered as well as whether or not any warranty options were purchased at that time. To determine the exact warranty on your instrument, contact the nearest Agilent Technologies sales or service office with the model and serial number of your instrument. See Table 9-1 for a list of sales and service offices.
Safety, Warranty, and Assistance Assistance 8712ET/ES and 8714ET/ES RF Network Analyzers Assistance Product maintenance agreements and other customer assistance agreements are available for Agilent Technologies products. For any assistance, contact the nearest Agilent Technologies sales and service office.
8712ET/ES and 8714ET/ES RF Network Analyzers Table 9-1 Safety, Warranty, and Assistance Shipment for Service Agilent Technologies Sales and Service Offices UNITED STATES Instrument Support Center Agilent Technologies Company (800) 403-0801 EUROPEAN FIELD OPERATIONS Headquarters Agilent Technologies S.A. 150, Route du Nant-d’Avril 1217 Meyrin 2/ Geneva Switzerland (41 22) 780.
Index A A1 front panel assembly replacement, 3-4 A2 CPU board assembly replacement, 3-6 A3 fractional-N/reference assembly replacement, 3-10 A4 source assembly replacement, 3-11 A5 receiver assembly component replacement, 3-14 A6 power supply assembly replacement, 3-19 A7 display assembly replacement, 3-20 A8 disk drive assembly replacement, 3-22 absolute power accuracy test, 1-29 accessories, 7-19 accuracy, dynamic, 1-27 adjustments #100 set serial number, 2-7 #102 switched gain corr, 2-10 #103 ext detect
Index theory, 6-6 G gain compression test, 1-25 general information, specifications, 1-73 GPIB command reference for service, 5-23 syntax summary, 5-23 GPIB system troubleshooting, 4-39 H hardware, screws, 7-2 harmonics test, 1-33 how to order parts, 3-24 I installed memory, 5-10 installed options, 5-10 instrument warranty, 9-5 IP address, LAN, 4-40 K keyboard, DIN, 4-38 L LAN available cables, 4-44 cross-over cable, 4-42 IP address, 4-40 ping command, 4-40 subnet mask, 4-40 troubleshooting, 4-40 limiters
Index replaceable parts, 7-2 replacement procedures (A1) front panel assembly, 3-4 (A2) CPU Board Assembly, 3-6 (A3) fractional-N/reference assembly, 3-10 (A4) source assembly, 3-11 (A5) receiver components, 3-13 attenuator, 3-16 coupler, 3-15 limiter, 3-18 PC board, 3-14 switch, 3-16 (A6) power supply assembly, 3-19 (A7) display assembly, 3-20 (A8) disk drive assembly, 3-22 required tools, 3-2 S safety, 9-2 cautions, 9-2 symbols, 9-2 warnings, 9-2 warranty, 9-5 schematic ET and ES block diagram, 4-45 sour
Index trace at plus or minus 200 dB, 4-20 trace drift ET model, 4-34 types of failures, 4-2 using detector traces to, 4-18, 4-23 U update corr const menu, 5-11 upgrade kits, 7-20 upgrading SIMM memory, 3-8 upgrading the firmware, 8-5 URL for ordering firmware, 8-5 V view calibration data arrays, 5-21 voltages power supply, 4-8 W warranty, 9-5 4-Index Index
