EXFO IQS-1500 Power Meters for IQS-500/600 - Manual (Page 159)

SCPI Command Reference
Power Meters 151
Product-Specific Commands—Description
:SNUMber?
Description This query returns a value indicating the
module's serial number.
Syntax :SNUMber?
Parameter(s) None
Response Syntax <SerialNumber>
Response(s) SerialNumber:
The response data syntax for <SerialNumber> is
defined as a <STRING RESPONSE DATA>
element.
The <SerialNumber> response represents a
string containing the modules serial number.
Example(s) SNUM? Returns "123456-AB"