Evaluation of a voltage source with three calculable RMS outputs

This paper describes a voltage source which generates three different waveforms. Measurement techniques with such a source are proposed, with emphasis on the uncertainty of each waveform used, when the ac amplitude is defined with a dc calibration of the source. The instrument circuitry and operation is described. Measurement results are also discussed. Emphasis is given to selected parameters of waveforms and to their effect on the measured rms value.