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Agilent E1441A SCPI Command Reference 115
Chapter 3
• You can set the units for output amplitude to Vpp, Vrms, or dBm. See the
VOLT:UNIT command for more information.
• For dc volts, the output level is actually controlled by setting the offset voltage.
You can set the dc voltage to any value between ±5 Vdc into 50 ohms or
±10 Vdc into an open circuit. See the VOLT:OFFS command for more
information.
• Possible Conflict with Function Change: The output amplitude is
automatically adjusted if you select a function whose maximum amplitude is
less than that of the currently active function. This conflict may arise when the
output units are Vrms or dBm due to the differences in crest factor for the
output functions. For example, if you output a 5 Vrms square wave (into 50
ohms) and then change the function to sine wave, the function generator will
adjust the output amplitude to 3.535 Vrms (the upper limit for sine waves in
Vrms). A-221, “Settings conflict” error is generated and the amplitude is
adjusted.
• Output Amplitude and Output Termination: The output amplitude is
automatically adjusted (and no error is generated) if you change the output
termination. For example, if you set the amplitude to 10 Vpp and then change
the termination from 50 ohms to “high impedance”, the amplitude will double
to 20 Vpp. If you change from “high impedance” to 50 ohms, the amplitude
will drop in half. See the OUTP:LOAD command for more information.
VOLTage?
[SOURce:]VOLTage? [MIN|MAX] queries the output amplitude for the currently
selected function. Returns the magnitude of the output amplitude. Units are not
returned but are in the units set by the most recent VOLT:UNIT command.
VOLTage:OFFSet
[SOURce:]VOLTage:OFFSet <offset>|MIN|MAX sets the dc offset voltage for the
currently active function.
MIN selects the smallest dc offset voltage for the selected
function (0 volts).
MAX selects the largest offset for the selected function. The default
offset voltage is 0 volts for all functions. The offset voltage setting is stored in
volatile memory.
Parameters
Comments • You can set the offset to a positive or negative number with the restrictions
shown below. If the specified offset voltage is not valid, the function generator
will automatically adjust it to the maximum dc voltage allowed with the
present amplitude. (Vmax is the maximum peak-to-peak amplitude for the
Parameter Name Parameter Type Range of Values Default Units
offset numeric 0V to MAX
(see comments)
Vdc