Troubleshooting Incorrect Data - Agilent Technologies 86038A User Manual

Troubleshooting Incorrect Data

If wavelengths are incorrect, or measurements incorrect at certain
wavelengths
If the Stepped GD and Gain/Loss data looks incorrect
N O TE
If Stepped GD, Gain/Loss, DGD, or PDL looks incorrect
Agilent 86038A Optical Dispersion Analyzer, Third Edition
Troubleshooting Incorrect Data
1 Reboot the PNA and TLS.
2 If the wavelength errors or wavelength dependent errors still exist, troubleshoot
the TLS. Refer to "Restart the TLS and realign the TLS module" on page
If the ODA-measured-power for your device is different than expected, the first
step is to ensure that the fiber connections are clean and secure,
"Cleaning Connections for Accurate Measurements" on page
the test set power cable is plugged in. Also, make sure that the insulated patch
cord is connected from the High Output of the TLS to the TLS Input on the test set,
and that the green indicator light for the High Output of the TLS is on. If the TLS
high power output indicator light is not on, realign the TLS. Please
"Restart the TLS and realign the TLS module" on page
1 Ensure that the proper port is selected and a clean patch fiber is connected to
the selected port.
2 If the data still looks incorrect, isolate the problem to the TLS or MWM.
"Test the High output on the TLS" on page
3 If the data still looks incorrect, refer to "Choosing Setup Parameters" on
page 43.
You should first suspect a problem with the polarization scanner inside the
test set. Follow the steps below:
1 While the stepped measurement is running, listen carefully to see if the
Polarization Scanner turns on.
• If it doesn't turn on, try powering down the ODA. Restart and try the measure-
ment again.
• If the Polarization Scanner still fails to start, the Test Set needs to be replaced.
2 You can also check the results of the PDL measurement.
• If the PDL values measured on the normalization patchcord are close to the
noise floor (around 0.1dB), the polarization scanner is OK.
• If the PDL values are extremely low (around 0.01dB), the polarization scanner
Troubleshooting and Upgrades
refer to
272. Make sure that
refer to
265.
265.
265.
Refer to
263