Section 6. Troubleshooting:
The following table lists some of the major troubleshooting procedures.
Symptom Possible
Solution
A.
The PMDPro does not
execute the desired
function.
1.
Check the power supply indicator light.
2.
Check the operation mode.
3.
Check whether the PMDPro is in a setup or function
execution state.
B.
The measured PMD
does not match the set
value.
1.
Check the measurement setup (polarization analyzer or
other techniques); make sure the measurement
parameters are reasonable (e.g., wavelength step).
2.
Check the operation range (90 or 180 ps) and
corresponding SOPMD table
C.
The performance of
the device changes
suddenly (e.g., large
sudden increase in
loss).
1.
Make sure that no sudden external force or vibration was
applied to the instrument.
2.
Use the DGD or PMD scan function to find out how
many states are out of order. This information indicates
the possibility of damage to the optical components
inside the device.
3.
If the problem persists, the control circuit of the module
may have been damaged.
D.
Front panel static
Ethernet setup doesn’t’
work.
1.
The static Ethernet parameters cannot be set from the
front panel. Use the GP_SET_ETHERNET LabView
program to perform the static Ethernet setup.
E.
The control program
does not function
properly.
1.
Check the language settings of the control computer. It
should be set to English (United States). Changing the
language settings can cause the program to read
numerical values incorrectly.
Document #: GP-UM-PMD-1000-21
Page 116 of 122
