Owen Duffy wrote in
:

....
In a typical receiver with a sensitivity of around -135dBm for 10dB
S/N, the AGC will be delayed until the signal is about 20dB higher
than that, or about -115dBm... so an AGC derived solution cannot
indicate less than S2 on that scale. Nevertheless they do.


That should read:

In a typical receiver with a sensitivity of around -135dBm for 0dB S/N, the
AGC will be delayed until the signal is about 20dB higher than that, or
about -115dBm... so an AGC derived solution cannot indicate less than S2 on
that scale. Nevertheless they do.


Owen