EXFO IQS-12004B DWDM Passive Component Test System for IQS-500 - Manual (Page 272)

SCPI Commands Reference
260 IQS-12004B
Specific Commands
READ:PowerMeter?
Description The response to this query indicates the power meter value for
the specified channel.
Syntax READ:PM?
Parameter None
Response A power measurement in the 9999.999 dBm format for the
specified channel.
Example READ:PM?
Note This is a blocking function i.e., In progress appears in the
status bar and you must wait before sending a new command.