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SNR - peak-to-peak or RMS?

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raebrm

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Hi,

Hope someone can help me with the definition of signal-to-noise ratio (SNR).

On the last page of this document:
**broken link removed**
it is said that SNR is the ratio of the peak-to-peak signal and the rms noise

However, wikipedia:
https://en.wikipedia.org/wiki/Signal_to_noise_ratio
says that it is the ratio of the rms signal and the rms noise

my questions are:
1. which one is the correct? is there a standard way to convert between the two?
2. is there a SNR vs BER plot that i can view online?

thanks
 

Hi raebrm,

I have heard that SNR is the ratio of signal power to noise power':!:'
 

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.
 

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