signal to noise or carier to noise in terrestrial tv broadcast and most other
broadcast's is just a mesurment in dbm between the noise floor and the
signal level eg: a signal level of 75 dbm ( optimum signal for terrestrial tv
at the outlet ) has C/N or S/N of 45.8 dbm therfore the noise floor would
be 29.2 or for audio terms the S/N ratio given for an amp or other audio
device is the S/N ratio per db eg : a S/N of 0.001 means that 0.001 db of
noise is being generated internaly per db of actual audio signal
as for rms and peak to peak. rms is the continuouse output of a device
and peak to peak is the maximum power output across both positive and
negative supplies.