Troubleshooting The Tls - Agilent Technologies 86038A User Manual

Troubleshooting the TLS

Restart the TLS and realign the TLS module
Test the High output on the TLS
N O TE
Agilent 86038A Optical Dispersion Analyzer, Third Edition
Troubleshooting the TLS
• If you suspect faulty TLS wavelength performance,
realign the TLS module" on page
• If you suspect faulty TLS power performance,
the TLS" on page 265.
1 Exit out of the ODA application (File > Exit > "agilentoda" > Yes). Turn the TLS
power off then back on.
2 If the TLS needs realignment, a message box will be displayed. Follow the
instructions to run the realignment. This process can take up to 45 minutes.
3 After the realignment is complete, restart the ODA application by double clicking
on the ODA desktop icon, or navigating to Start > Programs > Agilent Optical
Dispersion Analyzer > Agilent 86038A.
4 If wavelength results are still incorrect, check the TLS output wavelength with a
multi-wavelength meter. The TLS module may need to be replaced.
1 Ensure the laser is off, and disconnect the patchcord from TLS output at the
Source Input on the test set.
2 Connect TLS Output 2 to a power meter module.
3 Set the power meter wavelength to the center of TLS wavelength range (e.g.
1550 nm), and the output power to 0 dBm and then -5 dBm.
• If the TLS output power as read by the power meter matches the output power
set on the TLS within 0.5 dB, the TLS is operating properly. Ensure that there is
power to the test set. Carefully clean the test set connections, and retest the
system. If the TLS power output is accurate and the test is reading low, it may
need to be replaced.
• If the TLS output power is off by more than 0.5 dB, or there is no output signal,
replace the TLS module.
Low SSE output on the TLS:
should test the Low SSE output on the TLS. Follow the steps above, using
TLS Output 1. If there is a power discrepancy between the TLS and MWM,
use the power meter to isolate where the failure lies.
Troubleshooting and Upgrades
refer to "Restart the TLS and
265.
refer to "Test the High output on
If using a MWM for wavelength correction, you
265