User`s guide

4-15

Programming

*OPC (Operation Complete)

The *OPC command sets the operation complete bit in the Standard Event

Status Register when all pending device operations have finished.

The *OPC query places an ASCII "1" in the output queue when all pending

device operations have finished.

Usage:

GPIB only

Command Syntax:

*OPC

Example: OUTPUT 711;"*OPC"

Query Syntax:

*OPC?

Returned Format:

1<NL>

Example: OUTPUT 711;"*OPC?"

ENTER 711;Op$

*RCL (Recall)

The *RCL command recalls the state of the instrument from the specified

instrument state register. If the instrument state register has not been previ-

ously stored, the *RCL command will restore the instrument to its power-on

state.

Usage:

GPIB and RS-232

NOTE

The *OPC command can be used to ensure all switch movement operations have com-

pleted before continuing the program. By following a ROUTE:LAYER:CHANNEL command

with an *OPC query and an ENTER statement, the program will pause until the response

(ASCII "1") is returned by the instrument.