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16 | Keysight | N437x Lightwave Component Analyzer Automation – Getting Started with SCPI - Application Note
Appendix A) Troubleshooting Tips
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Make sure the SCPI server has been started on the instrument.
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'Reset LCA System' and 'Reset Remote Interface' from the LCA Server as below if the
expected behavior is not observed.
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Test individual SCPI commands using the Keysight Connection Expert; this is a good
approach to verify command syntax. If sending a command to set an instrument
parameter (i.e. ':PARameter:WAVelength 1310') immediately query the set value to see
if the LCA recognized the command (i.e. ':PARameter:WAVelength?'). Additionally, for
every command which is tested in the Keysight Connection Expert, send the command to
query for system errors (i.e. ':SYST:ERR?'). This will help identify if there is a portion of the
command which is not recognized by the instrument.
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