EXFO IQS-1600 High-Speed Power Meter for IQS-500/600 - Manual (Page 160)

SCPI Command Reference
152 IQS-1600
Product-Specific Commands—Description
:READ[1..n][:SCALar]:POWer:DC?
Description This query performs an "initiate and fetch" on the
specified channel. A measurement value is
stored and returned.
To read a specific channel, enter the channel
number as a suffix of the READ keyword. The
maximum channel is device-dependent.
Channel 1 is always used by default.
Syntax :READ[1..n][:SCALar]:POWer:DC?
Parameter(s) None
Response Syntax <PowerMeasurement>
Response(s) PowerMeasurement:
The response data syntax for
<PowerMeasurement> is defined as a <NR3
NUMERIC RESPONSE DATA> element.
This query returns the current power.
If the returned value is:
9221120237577961472, power is under range
9221120238114832384, power is over range
9221120238651703296, power is invalid
9221120239188574208, channel is inactive