NTSC S/N Ratio

For a standard NTSC satellite signal enter baseband video bandwidth (BBV BW) in MHz, the the RF bandwidth (RF BW) of the signal transmitted over the satellite link in MHz, the receiving earth station C/N ratio in dB, the de-emphasis value P and the subjective improvement factor. Carsons rule is used to find the peak frequency and the baseband S/N ratio appears after the "Calculate" button is pushed.As an example, input BBV BW, = 4.2, RF BW = 30, C/N = 15, P= 9 & Q= 8 and your output S/N should equal 50.54