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April 2018 42 FPM-8220
Command Reference
The following pages contain a reference for both common and device-dependent commands of the
FPM-8220 Fiber Optic Power Meter. This reference contains useful information for both local and
remote operation of the FPM-8220.
*CAL? Common
Device Dependent
Front Panel
Action Adjusts the internal analog to digital (A/D) converter to reference points, then reports results.
Response
Zero = OK
Non-zero = calibration error
Notes The A/D chip in the FPM-8220 performs automatic calibration. Thus, this query always return 0.
Example *CAL?
*CLS Common
Device Dependent
Front Panel
Action Clears status event registers: Standard Event Status, Device Event Status, and Error Queue.
Notes Useful to clear registers before enabling service requests (SRQ).
Example *CLS
*ESE <nrf value> Common
Standard Event Status Enable Device Dependent
Front Panel
Action Enables bits in the Standard Event Status Enable Register.
Parameters The value must be between 0 and 255.
Notes Bit 5 of the Status Byte Register (STB) is set if any enabled conditions are true.
Setting Bit 0 allows for generation of service requests from overlapped commands as previous
operations complete. This may be useful for ensuring that an operation is complete before starting a
measurement.
Examples “*ESE 40” –action: Sets the Standard Event Status Enable Register to enable Bit 5 of the Status Byte
Register if a device-dependent error or a command error occurs (40 = 2
3
+ 2
5
).