The Theoretical Analysis of Nose-to-nose Calibration Procedure

Nose-to-nose calibration procedure used to calibrate the bandwidth sampl ing oscilloscope was established under a premise that the kick-out pulse is pro portional to the impulse response of the oscilloscope.Dr.Jan Verspecht and NIST ve rified it by S parameters.We researched it from the circuit of the sampling head ,and found the generation mechanism of the kick-out pulse,which is a different point with before. And drew the conclusion that the kick-out pulse is related t o not only the parameters of the circuit but also the strobe pulse,which could n ot be explained before.And the mathematic expression which is given in the paper sh ows the correctness of the analysis.Simulations validate it also.