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IEEE 488.2 and Specific Command Reference
Broadband Source
123
IEEE 488.2 Commands—Description
*OPC?
Description The *OPC? query allows 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 <Acknowledge>
Response(s)
Acknowledge:
The response data syntax for <Acknowledge> is
defined as a <NR1 NUMERIC RESPONSE DATA>
element.
The <Acknowledge> response is a single
ASCII-encoded byte corresponding to 1.
The receipt of an <Acknowledge> response
indicates that all pending selected device
operations have been completed.
Example(s) *OPC? Return 1
See Also *OPC
*WAI