Pulse avalanche diode oscillators with an injected CW signal

The primary physical parameters affecting the frequency of pulsed avalanche diode oscillators (PAO) are discussed. A simplified equation, describing the interaction of an injected CW signal with the signal generated in the pulsed oscillator, is presented and the results of numerical calculations are plotted. It is shown that the oscillator frequency is merely pulled by the injected CW signal and that neither the output frequency nor the phase are "locked" to the injected signal.