Newport FPM-8220, User Manual

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April 2018 69 FPM-8220
No response from a remote command
and the RMT indicator is off Check that a GPIB or USB A/B cable, from the system
controller, is connected to the FPM-8220. If you are using
GPIB, the cable should be less than 3 meters (10 feet) long.
Press
RECALL and the UP ARROW at the same time to
display the GPIB address for three seconds. If it is not
correct, change it by pressing the
UP ARROW or the
DOWN ARROW until you see the correct address.
Check that your controlling software is sending commands
to the correct GPIB address or with the correct terminating
character.
Check that no two devices are set to the same GPIB
address.
Make sure that there are less than 15 devices on the bus.
Check that total GPIB cable length is less than 20 meters
(65 feet).
Check the configuration of your GPIB controller card or
COM port. Specifically note the information regarding the
terminating character.
Remove all other instruments from the GPIB bus to isolate
the FPM-8220. If this corrects the problem, re-connect one
instrument at a time until the problem returns. Then check
the other instrument for address conflicts and proper GPIB
function.
Read the error queue remotely (
ERR?
). The command
syntax or command structure may be in error.
Read the status byte ( *STB? ) and condition register
( COND? ) for possible device problems.
Slow or unexpected response to remote
commands Check that no two devices are set to the same GPIB
address.
Make sure that there are less than 15 devices on the bus.
Check the configuration of your GPIB controller card or
COM port. Specifically note the information regarding the
terminating character.
Check that total GPIB cable length is less than 20 meters.
Remove all other instruments from the bus to isolate the
FPM-8220. If this corrects the problem, re-connect one
instrument at a time until the problem returns. Then check
the other instrument for address conflicts and proper GPIB
function.