Troubleshooting Sweep And Normalization Problems - Agilent Technologies 86038A User Manual

Troubleshooting and Upgrades
N O TE
If the Modulator Bias does not complete
If the Wavelength Correction does not complete
262
Troubleshooting Sweep and
Normalization Problems
The ODA will not sweep if the Modulator Bias or Wavelength Correction
does not complete. Refer to the steps below for whichever condition you
suspect.
If the application hangs during a measurement, restart the PNA.
The Modulator Bias will not complete if the input power detected is too
low.
1 Ensure that the test set power cord is plugged in.
2 Ensure that the proper port is selected and a clean patch fiber is connected to
the selected port. Use the Real Time Port Monitor to check the power at the input
port. See "1. Check the Modulator
3 Isolate the problem to the TLS or MWM.
TLS" on page 265.
The wavelength correction will not complete if there is a low or missing
signal.
1 Ensure that the test set power cord is plugged in.
2 Ensure that the MWM is plugged in and turned on. The MWMs GPIB cable
should be attached to the rear of the PNA and have a GPIB address set to 10. If
any of the above conditions are not met, exit the ODA software (File > Exit >
"agilentoda" > Yes) and restart. The ODA software will detect the MWM on
power up.
3 Make sure that there is a short patch fiber running from the Low SSE output of
the TLS to the input on the MWM.
4 Look at the status area of the MWM to ensure that there are no errors displayed.
If there are errors, refer to the MWM online Help.
5 Isolate the problem to the TLS or MWM.
TLS" on page 265, and test the Low SSE output on the TLS.

Troubleshooting Sweep and Normalization Problems

Bias'.
Refer to "Test the High output on the
Refer to "Test the High output on the
Agilent 86038A Optical Dispersion Analyzer, Third Edition