5 Programming Examples
230 Keysight Models 6811C, 6812C, and 6813C Programming Guide
Maximum voltage
The maximum rms output voltage that can be programmed can be queried with:
VOLTage? MAX
The maximum voltage that the ac source can output is limited by the peak value
of the waveform. This is 425 V peak on all models. Since the user programs output
voltage in units of rms volts, the maximum value that can be programmed is
dependent on the peak-to-rms ratio (crest factor) of the selected waveform. For a
sine waveform, the maximum AC voltage that can be programmed is 300 V.
Frequency
The output frequency is controlled with the FREQuency command. To set the
output frequency to 50 Hz, use:
FREQuency 50
Voltage and frequency slew rates
Voltage slew
The 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 the
voltage slew rate to 20 V per second, use:
VOLTage:SLEW 20
At *RST the slew rate is set to INFinity, which means that AC voltage changes
occur at the fastest possible slew rate. The slew rate applies to programmed
changes in AC output amplitude while the unit is operating in fixed mode.
Amplitude changes made by the step, pulse, and list transients are controlled by
the same rules that apply to all other functions that are subject to transient
control. Refer to “Programming Output Transients” on page 236.
Because voltage commands are coupled with the waveform shape and voltage
offset commands, changing voltages without changing the waveform shape or
voltage offset may result in an error if the resulting peak voltage amplitude
exceeds the maximum voltage rating of the ac source. Refer to “Coupled
commands” on page 235 for more information.
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