A New Method to Compensate Quantized Time-Base Nonlinearity of Sampling Instruments
نویسندگان
چکیده
--Timebase distortions cause nonlinear distortions of the sampled waveforms by equivalent-time sampling instruments. A new model of quantizer is proposed to be used when a large part of timebase distortions is the result of non-random quantization error that is known. A compensation method based on this model is applied to timebase quantization. The simulated results show that the proposed compensation method can reduce the cumulative timebase quantization error, change the non-normal rms quantization error to be normal, and improve the measurement accuracy. The experimental results from a wideband sampling voltmeter confirm that the proposed method can improve the measurement accuracy of sampling instrument.
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