Troubleshooting The Tls - Agilent Technologies 86038B User Manual

Troubleshooting the TLS

Restart the TLS and realign the TLS module
Test the High Power output on the TLS
Agilent 86038B Photonic Dispersion and Loss Analyzer, Second Edition
• If you suspect faulty TLS wavelength performance, refer to
TLS and realign the TLS module" on page
• If you suspect faulty TLS power performance, refer to
Power output on the TLS" on page
• Please refer also to the Tunable Laser Source User's Guide
and Lightwave Measurement System User's Guide for further
information.
1 Exit out of the PDLA application (File > Exit > 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 PDLA
application by double clicking on the PDLA desktop icon, or
navigating to Start > Programs > Photonic Dispersion and
Loss Analyzer > Photonic Dispersion and Loss Analyzer.
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.
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,
optimize the Modulator Bias and Input Polarizer while a
patchcord is attached, and retest the system with the
Real-Time Port Monitor. If the TLS power output is
accurate and the test is reading low, the Test Set may need
to be repaired.
"Restart the
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"Test the High
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