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
68
FPM-8200
C H A P T E R
5
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
Corrective Actions
Does not power up.
•
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.
ZERO function does not work.
•
Error message E−531 normally indicates there is too much room light
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.
Display shows "
− OL −
".
•
(
O
ver
L
oad)˙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.
Display shows "
− LO −
".
•
(
LO
w)˙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.
Summary of Contents for FPM-8200
Page 2: ......
Page 8: ...L I S T O F FIG U R E S vi FPM 8200...
Page 10: ...L I S T O F TA B L E S viii FPM 8200...
Page 16: ...WA R R A N T Y xiv FPM 8200...
Page 36: ...FR O NT PA N E L O P E R A T I O N Operating Guidelines 20 FPM 8200 C H A P T E R 2...
Page 96: ...80 FPM 8200 A P P E N D I X A...
