Gpib Troubleshooting Guide - ILX Lightwave MPS-8033 Series User Manual

T R O U B L E S H O O T I N G
6
C H A P T E R
Hardware Troubleshooting Guide
Table 6.1 Hardware Troubleshooting
Symptoms
Output is on but there is no
light at the end of the patch
cord

GPIB Troubleshooting Guide

If you have difficulty operating the 8033 via GPIB, refer to the symptoms listed here.
Symptoms
No response from 8033
upon a GPIB command
(remote light does not come
on)
Slow or unexpected
responseto GPIB
commands
Device does not respond to
command (remote light is
on)
Bus Hangs
82
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Causes and Corrective Actions
Check the patch cord and the connection with the 8033 and other test
•
equipment.
Causes and Corrective Actions
Check that a GPIB cable is connected between the 8033 and the system
•
controller (your computer). This cable should be less than 3 meters long.
Check that the GPIB address is set properly and the controlling software is
•
sending commands to the proper address.
Make sure no two devices have the same GPIB address.
•
Check that there are less than 15 devices on the bus and there is less than 20
•
meters of total cable.
Check that the GPIB controller card in the host computer is configured
•
properly.
Try isolating the 8033 by removing all other instruments from the bus.
•
Make sure no two devices have the same GPIB address.
•
Check that there are less than 15 devices on the bus and there is less than 20
•
meters of total cable.
Make sure the GPIB controller card in the host computer is configured
•
properly.
Try isolating the 8033 by removing all other instruments from the bus.
•
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.
Make sure the GPIB controller card in the host computer is configured
•
properly.
Place a software timeout around the command in question to prevent the
•
hang.
Check the syntax of the command that is causing the hang−up.
•
Make sure the controlling software is not requesting information from the 8033
•
without first sending a query command.
Make sure the GPIB controller card in the host computer is configured
•
properly.
Check GPIB cables and the GPIB address.
•