The method based on the sampling frequency tracking software and broadband voltage / power calibration device

The present invention provides one kind of sampling frequency tracking method based on software, the sampling period of the sampling non-integer, non-integer sampling period sampling the deviation is reduced to a predetermined value or less, to realize the quasi-whole sampling period, the sampling period increased noninteger measurement accuracy. The present invention further provides / current calibration apparatus and broadband power / phase calibration apparatus of the above-described software-based sampling frequency tracking voltage method of broadband, the broadband voltage / current calibration apparatus comprises a broadband voltage / current source, broadband resistor divider / splitter, sampled digital voltmeter, a signal generator and a computer, broadband voltage / current source is connected through a broadband digital voltmeter sampling resistor divider / splitter, is connected to the output of the signal generator sampled digital voltmeter external trigger port, the computer signals are connected generator, the sampling voltmeter and a digital broadband voltage / current source.