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.
Parameter Typical Return
(none) <option number>
Returns installed options: *OPT?
*RCL <0-9>
Recall State Restores the instrument to a state that was previously stored in memory locations 0
through 9 with the *SAV command. All instrument states are recalled except: (1) the trigger system is
set to the Idle state, (2) calibration is disabled, (3) trigger settings are set to their Idle state, and (4)
non-volatile settings are not affected.
Parameter Typical Return
0 - 9 (none)
Recall state from location 1: *RCL 1
l Location 0 is automatically recalled at power turn-on when the Output Power-On state is set to
RCL0.
l You cannot recall an instrument state from an empty or deleted storage location.
l Stored instrument states are affected by *RST.
*RDT?
Returns the output channel descriptions. The description is an arbitrary ASCII string with up to four
semicolon-separated fields. To read the string into your computer, be sure to dimension a string
variable with at least 50 characters.
5 SCPI Programming Reference
250 Keysight N6700C Operating and Service Guide
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