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N9927-90003
4-9
FieldFox Analyzer
Troubleshooting
Measurement Group Troubleshooting
Measurement Group Troubleshooting
•
Make sure the unit is warmed up for at least 30 minutes.
•
Make sure the correct cal kit definition is being used; erase user data to force use of factory cal kit
definitions (see
Problems in NA Mode
Every FieldFox contains a factory calibration that was performed at the port 1 and port 2 connectors over
the entire frequency range of the FieldFox using a number of data points that allows reasonable
interpolation over the FieldFox frequency range.
This calibration, known as CalReady, allows you to immediately make accurate measurements for a
DUT that is connected directly at the test ports (PORT 1 and/or PORT 2). CalReady corrects
measurements when the FieldFox is turned ON, when Preset is pressed, and when a measurement is
created with no other correction in place.
If you are seeing a problem at Preset, perform the standard S-parameter test set troubleshooting
procedure, starting with the following procedure:
“Checking the A, B, R1, and R2 Signals (NA Mode)”
Checking the A, B, R1, and R2 Signals (NA Mode)
The first step is to verify that the A, B, R1, and R2 traces are present and that they are approximately
level:
•
To access this:
1. Press
Trace
,
3
2. Select <Num of Traces>
3. Choose <x4>
4. Select <Trace 1>
5. Press
Measure
,
1
6. Choose <Advanced>
7. Select <A>
8. Repeat Steps 1, 4, 5, 6, and 7 for Receivers B, R1, and R2.
•
Traces A, B, R1, and R2 are displayed in four separate data windows as shown in
.
Identifying discrepancies of the traces in these windows can help you to isolate the faulty assembly.
Содержание FieldFox MW N9913A
Страница 8: ...Contents 4 Service Guide N9927 90003 Contents ...
Страница 9: ...N9927 90003 1 1 1 Safety and Regulatory Information ...
Страница 16: ...1 8 N9927 90003 Safety and Regulatory Information FieldFox Analyzer Regulatory Information ...
Страница 17: ...N9927 90003 2 1 2 General Product Information ...
Страница 26: ...2 10 N9927 90003 General Product Information FieldFox Analyzer Agilent Support Services and Assistance ...
Страница 27: ...N9927 90003 3 1 3 Tests and Adjustments ...
Страница 37: ...N9927 90003 4 1 4 Troubleshooting ...
Страница 50: ...4 14 N9927 90003 Troubleshooting FieldFox Analyzer Measurement Group Troubleshooting ...
Страница 51: ...N9927 90003 5 1 5 Theory of Operation ...
Страница 58: ...5 8 N9927 90003 Theory of Operation FieldFox Analyzer Measurement Group Figure 5 2 Simplified RF Block Diagram ...
Страница 81: ...N9927 90003 6 1 6 Replaceable Parts ...
Страница 95: ...N9927 90003 7 1 7 Repair and Replacement Procedures ...
Страница 140: ...7 46 N9927 90003 Repair and Replacement Procedures FieldFox Analyzer Post Repair Procedures ...
Страница 141: ...N9927 90003 8 1 8 General Purpose Maintenance and Service Procedures ...
Страница 149: ...N9927 90003 Appendix 1 Appendix A ...
Страница 156: ...Index 4 N9927 90003 Index ...