*OPC
*OPC?
Operation Complete Command and Query. *OPC command sets "Operation Complete" (bit 0) in the Standard
Event Register at the completion of the current operation. *OPC? query returns 1 (decimal value of bit 0) to the out-
put buffer after all pending commands complete. This query enables you to synchronize your application with the
instrument.
Parameter Typical return
(none) +1
Sets the Operation Complete bit: *OPC
Returns 1 when the command is complete: *OPC?
– Other commands may be executed before *OPC is set.
– Other commands cannot be executed until the *OPC? completes.
– The differences between *OPC and *OPC? is that *OPC sets a status bit when the operation completes, and
*OPC? outputs "1" when the operation completes.
*PSC {0|1}
*PSC?
Power-On Status Clear Command and Query. Enables (1) or disables (0) the clearing of certain enable registers at
power-on:
– Questionable Data Register (STATus:QUEStionable:ENABle command)
– Standard Operation Register (STATus:OPERation:ENABle command)
– Alarm Register (STATus:ALARm:ENABle command)
– Standard Event Register (*SRE command)
– Status Byte Register (*ESE command)
The *PSC command does not affect the clearing of the condition or event registers. Only the enabled
registers will be cleared.
Parameter Typical return
{0|1}
Default: 1
0 or 1
Disables the power-on clearing of the affected registers: *PSC 0
150
Keysight DAQ970A/DAQ973A Programming Guide
2 SCPI Programming
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