Troubleshooting Incorrect Data - Agilent Technologies 86038B User Manual

Troubleshooting Incorrect Data

If measured loss is very high or parts of the curve are missing
N O TE
If wavelengths are incorrect, or measurements are incorrect at certain
wavelengths
If the GD and Gain/Loss data looks incorrect
N O TE
Agilent 86038B Photonic Dispersion and Loss Analyzer, Second Edition
The optical power from the DUT may be too low. This will
usually be indicated by a "Low Signal on DUT path" message in
the status log.
1 Check the power level at the correct port with the rest-time
port monitor. Assure that the DUT does not have excessive
loss at the chosen wavelength.
2 If the power level is too low compared to the Monitor Port,
considering the expected DUT loss, check and clean the
optical connections.
3 If the TLS high power output indicator light will not turn on, the TLS may need
realignment. Please refer to
module" on page 299.
The "Low Signal on DUT path"message will also appear if the DUT has
high loss in part of the spectrum, like a filter. If desired, the message
can be turned off from the: System>Configuration tab. Warnings will
still appear for low Monitor Port power.
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 299.
• Refer to
"Choosing Setup Parameters" on page
If the Group Delay curve is steep, there is a possibility that the change in
phase between two points is too large. This condition will result in a phase
wrap. Refer to "If the Group Delay measurement shows a sudden
large offset" on page
"Restart the TLS and realign the TLS
298.
61.
297