E.M. Proshin, A.M. Abramov, A.G. Borisov, S.G. Gurzhin, M.B. Kaplan, G.A. Sadovskiy, A.V. Shulyakov

The article describes methods of digital probing technologies (DPT) static and dynamic characteristics determination used in the process of certificate tests and on-board information-measuring systems modules assessment in Flight-Research institute by the name of M.M. Gromov (Zhukovsky). Two automated methods to determine the parameters of actual DPT transfer function and instantaneous dynamic errors realized on the basis of personal computer, configured data acquisition system LTR and unified interactive environment of graphic programming LabVIEW with specialized metrological software are offered. The article shows remarkable advantages of method to determine static DPT characteristics based on «gliding block diagram» such as the absence of PT non-linearity influence on the accuracy of transfer function (TF); regulated noise immunity and estimation of noise constituents in the process of each quantum interval determination; up-to-date detailed TF analysis and detection of errors; accumulation and construction of absolute value of any quantum interval with high accuracy. To estimate dynamic characteristics of test modules high accuracy of harmonic wave computing formation is offered to be used. To implement this process the signal registered by test module with the help of sample generator is compared to the signal mathematically calculated by computer having parameters search with minimum root-mean-square error. Residual difference gives values of dynamic error in the whole signal range.