ФАПЧ

The article is devoted to the problem of operational artillery fire adjustment using trajectory meters at the starting position. Such meters combined with ballistic calculations make it possible to adjust fire and change position even before the hitting the targetand without the involvement of gunners. The technical side of the problem consists in more attractive signal characteristics of the centimeter range meters, but unacceptable for practical use of their dimensions.

The goal of this paper is an experimental measurement of the frequency response of the software phase-locked loop (PLL) transfer function using frequency modulated signals.

Demodulators of broadband frequency modulated (FM) signals are characterized by noise immunity threshold — the phenomenon of rapid deterioration of signal-to-noise ratio on its output with the slight deterioration of this ratio on its input.