HP 8517B Manual de usuario Pagina 89
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HP 8517B S-Parameter Test Set Manual
6-5
HP 8517B Test Set Replacement Procedures
Assembly Replacement Procedures
Assembly Replacement Procedures
Initial Precautions Before beginning any of the procedures in this chapter, do the following:
1. Turn off the HP 8517B test set.
2. Disconnect the test set’s power cord.
3. Remove the top- and side-covers, trim strips, and handles.
4. Do not exceed the maximum torque necessary to secure a connector.
Refer to Table 6-1 for torque specifications.
5. Exercise caution with semi-rigid cables; they can be bent very easily.
6. Reverse an assembly’s removal procedure for reinstallation, unless
otherwise instructed.
Switch/Splitter
Replacement
A18 Switch/Splitter Assembly
1. See Table 6-2 for component locations.
2. Remove the five semi-rigid cables and the three flexible cables from the
switch/splitter. (Reposition cables as required to ease removal.)
3. Remove the two fixed attenuators from the switch/splitter (note that
there are three fixed attenuators in Option 007, and in Option 004 “plus”
007).
4. Remove the two screws that attach the switch/splitter to the bracket.
5. Remove the switch/splitter from the test set.
Frequency Converter
Replacement
A14, A10 to A13 Frequency Converter Assembly
The frequency converter consists of the A14 VTO (voltage-tuned oscillator)
assembly and four samplers, A10 through A13. See Figure 6-2 for
component locations.
1. Remove the semi-rigid cable attached to each of the four samplers.
2. Remove the four in-line attenuators from the samplers (only in Options
007, Option 002 “plus” 007, and Option 004 “plus” 007).
3. Remove the six flexible cables from the frequency converter by pulling
gently on the gold connector.
4. Remove the four frequency converter mounting plate screws and the
bracket screw that fastens the frequency converter to the chassis.
5. Unplug the ribbon cable near the front panel.
- HP 8517B 1
- S-Parameter Test Set 1
- Restricted Rights Legend 2
- HP 8517B S-Parameter Test Set 3
- Warranty 4
- Service and Support 6
- Instrument Markings 7
- Safety Earth 8
- Path Name 9
- Contents 11
- Contents-2 12
- Contents-3 13
- Contents-4 14
- Contents-5 15
- Contents-6 16
- Getting Started 17
- Test Set Description 18
- HP 8517B Test Set Options 20
- Verifying Test Set Operation 21
- Accessories 26
- 11900-90003) 27
- Recommended Test Equipment 28
- Power Level Test Port 29
- Installation 31
- Initial Inspection 32
- Installing the Test Set 34
- Connecting the System 36
- Replacing O-Rings in 36
- Anti-Rotation Clamps 36
- Packaging the Test Set 37
- Front-Panel Features 39
- Rear-Panel Features 40
- Multiple Test-Set Connections 43
- Measurement Calibration 46
- • recalls the cal set 46
- ≤+17 dBm 47
- Calibration 48
- Storing Trace 49
- Memories 49
- Viewing Normalized 49
- Parameters 49
- {SELECT DEFAULTS} 50
- {DEFAULT to MEMORY: 2} 50
- Making Operational Checks 51
- Performance Verification 52
- Using Anti-Rotation Clamps 53
- Positioning the thumb-screw 54
- Positioning the connector 55
- Aligning the thumb-screw 56
- Attaching the second clamp 56
- Specifications 58
- Rear Panel RF Connectors 59
- Troubleshooting the Test Set 61
- Theory of Operation 62
- Troubleshooting Sequence 65
- Equipment Needed 66
- But Not Supplied 66
- A15 Primary Regulator 67
- Board Assembly 67
- A27 Post-Regulator Board 67
- Assembly 67
- Troubleshooting Procedures 68
- HP 85102 IF 72
- Amplifier Test 72
- Using the Service Adapter 72
- Service Adapter Conclusions 73
- Isolating Signal Path 74
- Problems 74
- TestingPaths5and6 76
- HP 8517B, Option 007 80
- Unratioed Power Test 80
- Finding the Faulty 83
- Performance Tests 86
- Adjustments 86
- Switch/Splitter 89
- Replacement 89
- Frequency Converter 89
- Regulator Board 90
- Filter Capacitor 90
- Test Port Connector 91
- Fan Assembly 92
- Power Transformer 92
- WARNING 93
- Front Panel and 94
- Interface Board 94
- Test Port Coupler 95
- Test Port Attenuator 95
- Input Amplifier 96
- Buffer Amplifier 96
- Post Regulator Board 97
- • Telephone 1-(800) 227-8164 100
- HP 8517B Replaceable Parts 101
- Abbreviation Prefix Multiple 108
- Table 7-5 Instrument Fuses 110
- *Components not visible 114
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