TROUBLESHOOTING | MEASUREMENT IN QUESTION |
Condition of the 373XXA.
Quality and condition of the interface connections and connec- tors.
Quality and condition of the calibration components,
Surrounding environmental conditions at the time of the mea- surement.
Selection and performance of the calibration for the DUT being measured.
Measurement When determining possible measurement problems, check the follow-
Conditions Check List ing items:
1. Check the DUT and the calibration conditions:
ensure the Calibration Components Coefficients data has been installed into the system from the Calibration Kit in use.
ensure the proper calibration was done for the device being measured:
For high insertion loss device measurements the calibra- tion should include isolation, high number of averages, and lower IF Bandwidth settings during the calibration.
For high return loss device measurements the calibra- tion should also include a sliding load calibration.
Check DUT mating connector(s) condition and pin depth. Measure an alternate known good DUT, if possible.
Check if the environment is stable enough for the accuracy re- quired for the DUT measurement.
The system should not be subjected to variations in tem- perature.
The system should not be placed in direct sun light or next to a changing cooling source, such as a fan or air conditioning unit.
2. Check the calibration using known good components from the cal- ibration kit. If measurements of these devices do not produce good results:
Check
Check condition and pin depth of calibration kit components. Replace with known good components, if necessary.
Check condition and pin depth of test port connectors. Replace with known good ones if necessary.
373XXA MM |
