Troubleshooting Guide; Front Panel Problems - ILX Lightwave FPM-8200 User Manual

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C H A P T E R

Troubleshooting Guide

This section lists some common problems and corrective actions. For a
comprehensive list of frequently asked questions, see the ILX Lightwave website
or contact ILX Lightwave Customer Service (see Comments, Suggestions, and
Problems on page xii for contact infomation).

Front Panel Problems

Symptoms
Does not power up.
ZERO function does not work.
Display shows "− OL −".
Display shows "− LO −".
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 FPM-8200
T R O U B L E S H O O T I N G A N D M A I N T E N A N C E
Troubleshooting Guide
Corrective Actions
Check the power cord to make sure that it is properly connected. To
•
check a power connection, connect the cord to another known
working instrument.
Error message E−531 normally indicates there is too much room light
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for a proper ZERO. The optic input connector must have an adaptor
with dark fiber attached.
Connector adaptor: Make sure you have a patchcord connected.
•
Leave the other end of the patchcord connected to your source with
its output set OFF.
Bare fiber adaptor ring: Make sure the ILX BF−820 Bare Fiber Holder
•
is installed, with a fiber. Leave the other end of the fiber connected to
your source with its output set OFF.
Agilent 81000BA bare fiber holder: Make sure Agilent holder is
•
installed, including a fiber. Leave the other end of the fiber connected
to your source with its output set OFF. Turn the fiber holder so the
large V−groove along the top is facing down, or away from room light.
If the error persists, contact ILX Lightwave.
•
(OverLoad)˙Too much optical input power for this range. Press UP
•
on the front panel to change the gain range. Or select AUTO/MAN
so the AUTO indicator is ON to automatically select an appropriate
gain range. You can then select AUTO/MAN again (AUTO indicator
OFF) if you want to lock it manually into one range.
If you see an − OL − indication in auto−range mode, or in the highest
•
range (lowest gain), the optical input power is beyond the FPM−8200
upper limit.
If you see an − OL − indication in manual−range mode, then the
•
optical input power is greater than 99.1% of full scale for the current
gain range.
(LOw)˙Not enough optical input power for this range. Press DOWN
•
on the front panel to change the gain range. Or select AUTO/MAN
so the AUTO indicator is ON to automatically select an appropriate
gain range. You can then select AUTO/MAN again (AUTO indicator
OFF) if you want to lock it manually into one range.
If you see an − LO − indication in auto−range mode, or in the lowest
•
range (highest gain), the optical input power is below the FPM−8200
lower limit.
If you see an − LO − indication in manual−range mode, then the
•
optical input power is less than 5% of full scale for the current gain
range.