Keysight N6705C - Page 290

l To be reported to the Standard Event Register, the corresponding bits in the event register must
be enabled using *ESE.
l Once a bit is set, it remains set until cleared by this query or *CLS.
l The value returned is the binary-weighted sum of all bits set in the register.
*IDN?
Identification Query. Returns instrument’s identification string, which contains four comma-separated
fields. The first field is the manufacturer's name, the second field is the instrument model number, the
third field is the serial number, and the fourth field is the firmware revision.
Parameter Typical Return
(none) <ASCII string with comma-separated fields>
Return the instrument's identification string: *IDN?
l Example response: Keysight Technologies,N6705C,MY55123456,E.00.02.2266
*OPC
*OPC?
Operation Complete Command and Query. *OPC sets the OPC (Operation Complete) status bit in the
Standard Event register when the instrument has completed all pending operations sent before *OPC.
This occurs at the completion of the current operation. Refer to Status Tutorial for more information.
*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
Sets the Operation Completebit: *OPC
Returns a 1 when commands complete: *OPC?
l These commands are primarily used for program synchronization.
l Used in conjunction with initiated acquisitions, initiated transients, output state changes, and out-
put settling time to provide a way to poll or interrupt the computer when these pending operations
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.
*OPT?
Option Query Returns a string identifying any installed mainframe options. A 0 (zero) indicates no
options are installed.
7 SCPI Programming Reference
290 Keysight N6705C Operating and Service Guide