Parameter Typical Return
(none) ASCII string with
semicolon-separated fields
Returns the learn string: *LRS?
*OPC
Sets the OPC (operation complete) bit in the standard event register. This occurs at the completion of
the pending operation. Refer to Status Tutorial for more information.
Parameter Typical Return
(none) (none)
Set the Operation Complete bit: *OPC
l The purpose of this command is to synchronize your application with the instrument.
l Used in conjunction with initiated acquisitions, initiated transients, output state changes, and out-
put to settling time to provide a way to poll or interrupt the computer when these pending oper-
ations complete.
l Other commands may be executed before the operation complete bit is set.
l The difference between *OPC and *OPC? is that *OPC? returns "1" to the output buffer when the
current operation completes.
*OPC?
Returns a 1 to the output buffer when all pending operations complete. The response is delayed until
all pending operations complete.
Parameter Typical Return
(none) 1
Return a 1 when commands complete: *OPC?
l The purpose of this command is to synchronize your application with the instrument.
l Other commands cannot be executed until this command completes.
*OPT?
Returns a string identifying any installed options. A 0 (zero) indicates no options are installed.
Parameter Typical Return
(none) OPT760
Returns installed options *OPT?
6 SCPI Programming Reference
235 Keysight N6900/N7900 Series Operating and Service Guide
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