SEQUENTIAL SAMPLING SYSTEM

摘要

Although conventional sampling techniques give minimum risetime in the oscillography of repetitive electrical waveforms, system timing uncertainties introduce drift and jitter errors which are typically comparable in magnitude to the cathode ray oscilloscope risetime. By using two sampling oscilloscopes in cascade and in conjunction with special triggering methods, it is possible to reduce the drift by a factor of 10<->3 down to a level of less than 10<->14 sec./minute. The use of two sampling oscilloscopes in cascade thereby allows highly effective jitter filtering with the result that the new system has greatly improved accuracy in portraying the waveforms of very fast electrical phenomena.