System-Level Control Commands - Agilent Technologies Agilent 3499A User Manual

Chapter 5 Remote Interface Reference

System-Level Control Commands

System-Level Control Commands
These commands allow you to synchronize the instrument to the bus
controller, reset the instrument, and control the display.
*OPC
*OPC?
This command and query are used to synchronize the instrument with
the bus controller. Use the *OPC command to set the bit in the Standard
Event Register (see page 151) if you are using the SCPI status system.
The bit is set when the command has finished executing.
Use the *OPC? query to synchronize the instrument with the bus
controller without using the SCPI status system. Append the query to a
command. The instrument returns a +1 in response to the query. For
example, if you send:
ROUTe:CLOSe (@101);*OPC?
the instrument will return a +1 when the command has finished
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executing. Note that if you use this on a scan command, the return will
not happen until the scan is complete (and depending upon your bus
controller and the length of the scan list, may cause a time-out).
*RST
This command resets the instrument and returns parameters to their
default settings. System memory is cleared, digital configuration returns
to the default state, and the error queue is cleared. Refer to page 74 for a
complete list of the reset conditions.
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