>10-1




            0    100   200   300   400   500   600   700   800



         10'I S. 10I





            0    100   200   300   400   500   600   700   800






         10'0I
               -- - -T - -yy --      ------7






            0    100   200   300   400   500   600   700   800

         10'










         10-0nosflo
            0    100   200   300   400   500   600   700   800
                                Frequency (Hz)








Figure 3-13 Top two plots show the ordinary coherent output spectrum due to the inputs. The bottom two plots compare the noise spectrum with the output spectrum, the multiple

                 coherent output spectrum and the noise floor.