Quote:
Originally Posted by rabbit73
I think you must mean -5 to -10 dB Noise Margin (NM) range. Signals that are -5 to -10 dBm are extremely strong; strong enough to overload a tuner.
If an antenna is in the clear, it is possible to receive signals as weak as -15 dB NM. It is not possible to receive signals any weaker than NM -15 dB, because they are below the Thermal Noise Floor at -106 dBm. If you are able to receive signals weaker than -15 dB NM, either the TVFool report is wrong or the signals have been enhanced by Tropospheric Propagation.
Where the -106 dBm comes from:
http://www.aa6g.org/DTV/Noise/noise.html
I expect you to spend at least as much time testing as I have spent answering your questions. 
Good luck
and
best regards,
rabbit |
Thank you for this post. I spent quite a bit of time on google searching for that exact information...