In this paper a proposed mathematical model is formulated and analyzed for the automatic gain control subsystem of a hostile radar homing missile receiver. The model is intended for evaluating an angular deception jamming technique called "AGC DECEPTION". The analysis of this technique needs a real-time laboratory model that responds to external excitations in exactly the same way as the original AGC subsystem does. The author has designed, realized and tested an analogue circuit model; upon which the proposed jamming technique can be applied and optimized for maximum effectiveness. This paper is interested only in the modelling process and the extent to which the author's model; drawn in Fig. 9, resembles the original missile AGC subsystem. With the proposed simulation technique every RF or video signal parameter is represented as a DC variable voltage that can be easily measured in real time on an oscilloscope