5 Programming Examples230 Keysight Models 6811C, 6812C, and 6813C Programming GuideMaximum voltageThe maximum rms output voltage that can be programmed can be queried with:VOLTage? MAXThe maximum voltage that the ac source can output is limited by the peak valueof the waveform. This is 425 V peak on all models. Since the user programs outputvoltage in units of rms volts, the maximum value that can be programmed isdependent on the peak-to-rms ratio (crest factor) of the selected waveform. For asine waveform, the maximum AC voltage that can be programmed is 300 V.FrequencyThe output frequency is controlled with the FREQuency command. To set theoutput frequency to 50 Hz, use:FREQuency 50Voltage and frequency slew ratesVoltage slewThe ac source has the ability to control the slew rate of AC amplitude changes.This can be used to generate ramps or to protect sensitive loads. To set thevoltage slew rate to 20 V per second, use:VOLTage:SLEW 20At *RST the slew rate is set to INFinity, which means that AC voltage changesoccur at the fastest possible slew rate. The slew rate applies to programmedchanges in AC output amplitude while the unit is operating in fixed mode.Amplitude changes made by the step, pulse, and list transients are controlled bythe same rules that apply to all other functions that are subject to transientcontrol. Refer to “Programming Output Transients” on page 236.NOTE Because voltage commands are coupled with the waveform shape and voltageoffset commands, changing voltages without changing the waveform shape orvoltage offset may result in an error if the resulting peak voltage amplitudeexceeds the maximum voltage rating of the ac source. Refer to “Coupledcommands” on page 235 for more information.
