Patent ID: 8255188

Claim:
A method of measuring signals provided from a device under test to reduce low frequency measurement instrument noise, said method comprising the steps of: providing at least one signal under test from a device under test to a measurement instrument; providing a reference signal to the measurement instrument; alternately sampling the at least one signal under test and the reference signal in an interleaved fashion such that the signal under test is sampled in one block and the reference signal is sampled in a subsequent block; repeating the alternate sampling process until N samples of the at least one signal under test and the reference signal are collected in a series of interleaved sampled waveform blocks, wherein N is a positive integer; measuring at least one signal characteristic of the interleaved sampled waveform blocks; providing an output indicative of the at least one measured signal characteristic; averaging selected samples obtained from the at least one signal under test; averaging selected samples obtained from the reference signal; and subtracting the average of the selected reference signal samples from the average of the selected signal under test samples.