EXFO IQS-600 Integrated Qualification System - Manual (Page 303)

IEEE 488.2 and Specific Commands
Integrated Qualification System 295
IEEE 488.2 Required Commands
*OPC
Description The *OPC command allows synchronization
between the instrument and an external
controller unit. The *OPC command causes the
instrument to set bit 0 (Operation Complete) in
the Standard Event Status Register to the TRUE
(logic 1) state when the instrument completes all
pending operations. Detection of the Operation
Complete message can be accomplished by
continuous polling of the Standard Event Status
Register using the *ESR? common query
command. However, using a service request
eliminates the need to poll the Standard Event
Status Register thereby freeing the controller unit
to do other useful work.
Syntax *OPC
Parameter(s) None
See Also *OPC?
*WAI