The analysis of analog and digital transformations for the sequences of video signals which enter the information measuring system (IMS) as an input impact (which is an additive compound of practical signals and noises) was held. The primary signal processing methods in the receiving channel of the IMS which allows receiving authentic metering information about temporal and energy parameters of signals in the present time scale, and moreover, to minimize error in their metering under conditions of predefined uncertainty about the input impact qualities are displayed in the article. The practicability of functional separation into temporal and energy branches of the IMS's objective function which points at the reduction of their analog and digital transformation's influence on nonlinear phenomena that emerge in the IMS's receiving channel subsystem was substantiated.

Perpose of research is to develop a technique for developing system and local models of targeted processes of functioning of the subsystem of the receiving channel of an information-measuring system. These models should make it possible to substantiate the possibility of optimizing the processes of interaction of the components of the analog-discrete conversion of the input action of a random nature.Methods. The technique for obtaining measurement information in the information-measuring system involves the use of algorithms that minimize information loss at each stage of conversion of the input action. A possible approach is the use of rational and optimal solutions when selecting and substantiating functional support of the input action ),,( St  in order to obtain current measurement information while minimizing residual uncertainty.Results. To solve this problem, it is necessary to build a system model for the totality of the basic functions that determine the implementation of the targeted process of analog-discrete conversion ) ,,( S t  ; to substantiate the way these functions are implemented, the criteria for their interaction; to determine the optimization technique and (or) rational construction of local targeted processes; to prepare guidelines and rules for structural constructions of the subsystem of the information-measuring system, the input actions of which have priori unknown characteristics. The paper proposes an approach to the functional organization of analog-discrete conversions of the input action of a random nature in the receiving channel subsystem of an information-measuring system, which allows improving the quality of the receiving channel of the information-measuring system and the operation of its components by optimizing the interrelated targeted processes for detecting pulse signals and measuring their parameters against the background of noise with a priori unknown characteristics.Conclusion. The application of procedures for temporary selection of signals controlled by the detection channel allows increasing the speed and accuracy of determining their parameters, increasing the noise immunity of the receiving channel subsystem of the information-measuring system, reducing the probability of skipping weak signals as well as increasing the accuracy of measuring the temporal parameters of pulse signals.