Agilent Technologies E1441A user service VOLTage?, VOLTage:OFFSet, Parameters, Chapter

•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? [MINMAX] 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>MINMAX 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

Parameter Name	Parameter Type	Range of Values	Default Units
offset	numeric	0V to MAX	Vdc
		(see comments)

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

Chapter 3 Agilent E1441A SCPI Command Reference 115