Uncertainty in the Nose-to-Nose Sampler Calibration Method Due to the Assertion That the Generator and Receiver Functions Are Identical

The nose-to-nose (ntn) sampler calibration method can only be used for particular sampler structures; however, for such structures, it provides a technique for determining the sampler´s transfer function and impulse response. The concern with the ntn method is that it is based on the assertion that the sampler behaves the same when it is acting as a receiver or as a pulse generator and therefore yields generator and receiver functions that are identical, which, in turn, affects the accuracy in the reconstruction of either function. The uncertainties in the estimate of the receiver and generator functions using the common receiver/generator function as a basis are determined.