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).
From the remote interface, 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 displayed amplitude will double to 20 Vpp. If you change from
“high impedance” to 50 ohms, the displayed amplitude will drop in half.
See the OUTP:LOAD command for more information.
VOLTage? [MINimum|MAXimum]
Query 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 {<
offset>|MINimum|MAXimum}
Set 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. [ Stored in volatile memory ]
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 selected output termination;
Vpp is the output amplitude in volts peak-to-peak.) From the remote
interface, a -221, “Settings conflict” error is generated and the offset is
adjusted.
Ô
V
offset
Ô
+
V
pp
2
Vmax and
Ô
V
offset
Ô
2 x V
pp
4
Chapter 4 Remote Interface Reference
Output Configuration Commands
149
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