INTERDICTION METHOD AND APPARATUS WITH DIRECT MEMORY CONTROL OF VARIABLE FREQUENCY ELEMENTS

摘要

Each subscriber module circuit comprises a plurality of latches (322) each of which is associated with one of a plurality of digital to analog converters (324). Each of the digital to analog converters (324) drives one or more frequency agile oscillators (326) with its analog output to generate the jamming signals. The subscriber module is based on a sequential state machine which loads frequency control words corresponding to the jammed channels from a frequency control memory (320) into each latch (322) on a cyclic basis. In this manner, the jamming signals generated by each latch (322), digital to analog converter (324), and oscillator (326) combination can be varied easily and quickly by a memory to memory transfer and be sustained between frequency hops without any change in frequency. The circuitry lends itself easily to large scale integration and miniaturization while eliminating the need to refresh the circuit to prevent frequency change because of voltage drop.