Mark, > If the SNR is negative, how is it that you can copy any signal?
The path simulator adds Gaussian white noise to the input signal to simulate a signal-to-noise ratio through a 3KHz band pass filter. If the SNR is less than 0, it's below the noise level. The signal is still there, it's just weaker than the noise. Tony, K2MO ----- Original Message ----- From: "Mark Miller" <[EMAIL PROTECTED]> To: <digitalradio@yahoogroups.com>; <digitalradio@yahoogroups.com> Sent: Thursday, August 21, 2008 5:42 AM Subject: Re: [digitalradio] Path Simulator Test - PSK FEC31 > If the SNR is negative, how is it that you can copy any signal? > > 73, > Mark N5RFX > > At 02:36 AM 8/21/2008, Tony wrote: >>__________________________________________ >> >>Sensitivity Test - Direct Path >>(no ionospheric disturbance) >> >>Minimum SNR for error-free copy >> >>Contestia 500/32............-15db >>DominoEX-4 ..................-15db >>F >
