Reference –
189
Reference
Troubleshooting
This section is to be used in the unlikely event that the Swept Wavelength System does not
perform according to specification. It lists the symptoms of some faults, with procedures for
troubleshooting each problem. The procedures described do not require the user to open any of
the units or perform any task that requires extensive training.
Most of the tests require standard electrical and optical measurements. Equipment required to
troubleshoot the SWS includes optical cleaning fluid and swabs, a fiber optics power meter, and
a wavelength meter operating in the appropriate band.
The
Troubleshooting Flowcharts
section contains flowcharts to systematically identify the
cause of any fault, and in most cases, to fix the problem. If the equipment failure cannot be
corrected by the user, an SWS performance checklist, in the
Recording SWS Performance
section, is provided for the user to record system parameters and procedures performed when a
problem has occurred. The checklist is used by the JDS Uniphase service hotline to help
diagnose the problem, and it is to be returned with the equipment if factory repair is necessary.
If any problem cannot be solved by following the procedures listed in Table 22, contact the local
JDS Uniphase representative or the service hotline. If it is necessary to return the laser to JDS
Uniphase for repair, ship the unit only to the address given at the beginning of this document,
following the procedure outlined in the
Getting Started
section.
Table 22: Troubleshooting
Problem
Solution
1
When the Execute button is
pressed on the SOM, an
error message “laser timed-
out” is displayed on the
SOM.
Check the RS232 connection. Ensure that the cable is:
•
Marked PSTC 2463.
•
Connected to the Aux.1 of Laser port at the back of
the SOM.
•
Connected to the RS232 port at the back of the
tunable laser source.
If the error persists, call the local JDS Uniphase
representative or the service hotline.
2
Laser displays the error
message “Limit Switch,
Turn power off”.
Check the power setting on the SOM:
•
Ensure that the power setting is set at 3 dBm. If the
power is set at a higher value, reset to 3 dBm.
•
Restart.
If the problem persists, turn the laser power off.
Contact the local JDS Uniphase representative or the
service hotline to return the laser to the factory.
(table continued)
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