Gn. Stenbakken et Jp. Deyst, COMPARISON OF TIME BASE NONLINEARITY MEASUREMENT TECHNIQUES, IEEE transactions on instrumentation and measurement, 47(1), 1998, pp. 34-39
Distortions in the timebases of equivalent-time oscilloscopes and digi
tizers cause distortions of waveforms sampled by them. This paper repo
rts on a comparison of two methods of characterizing timebase distorti
on, using pure sine-wave inputs of known frequency: the ''sinefit'' an
d the ''analytic signal'' methods. Simulations are used to compare the
performance of the two methods versus different types of timebase dis
tortion, different sine-wave frequencies, number of different sine-wav
e phases, levels of random noise, and levels of random jitter, The per
formance of the two methods varies considerably, dependent upon the in
put signal frequency and type of timebase distortion. Each method does
much better than the other for certain cases.