Multi dB reductions of cavity noise in an amplified digital system

Summary form only given. Values of Rayleigh cavity (Rc) also depend on linewidth of the signal and receiver bandwidth. When the linewidth is broadened by nonlinear effects, here after called nonlinear broadening, a portion of the noise will fall outside the bandwidth of the receiver and Rc will be reduced. This work will demonstrate an 11 dB reduction. Similarly phase modulation also broadens the line and reduces Rc but not entirely for the same reason.