BNC 645 - Manual (Page 169)

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VOLTage:UNIT {VPP︱VRMS︱DBM}
Select the unit of the output amplitude. The default is VPP. The waveform
generator used the same unit for front panel and the remote interface, so the
front panel display in the unit that you select from remote interface.
If you don’t specify the unit in the APPLy or VOLT commands, the function
generation uses the unit specified in this command.
When the output termination is set to “high impedance”, you cannot specify the
output amplitude in dBm. The unit will be automatically converted to Vpp.
VOLTage:UNIT?
Query the unit of the output amplitude. “VPP”, “VRMS” or “DBM” will be
returned.
-- W --
*WAI
Wait for all pending operation to complete before executing any additional
commands over the interface.
B.4 SCPI Compliance Information
This section encloses a list of commands that are device-specific to Model
645. Although not included in the 1999.0 version of the SCPI standard,
these commands are designed with the SCPI format in mind and they
follow all of the syntax rules of the standard.
Many of the required SCPI commands are accepted by the waveform
generator but are not described in this manual for simplicity or clarity.
Most of these non-documented commands duplicate the functionality of
a command already described in this chapter.