EXFO FTB-2 User Manual
Page 360
IEEE 488.2 and Specific Command Reference
350
FTB-2 and FTB-2 Pro
IEEE 488.2 Required Commands
*OPC?
Description
The *OPC? query makes possible the
synchronization between the instrument and an
external controller by reading the Output Queue
or by waiting for a service request on the
Message Available (MAV) bit in the Status Byte
Register. The *OPC? query causes the instrument
to place an ASCII character, 1, into its Output
Queue when the device completes all pending
operations. A consequence of this action is that
the MAV bit in the Status Byte Register is set to
state 1.
Syntax
*OPC?
Parameter(s)
None
Response Syntax
Response(s)
Acknowledge:
The response data syntax for
defined as a
element.
The
ASCII-encoded byte corresponding to 1.
The receipt of an
indicates that all pending selected device
operations have been completed.
Example(s)
*OPC? returns 1
See Also
*OPC
*WAI