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Old 10-May-2015, 3:32 PM   #14
rabbit73
Retired A/V Tech
 
Join Date: Aug 2012
Location: S.E. VA
Posts: 2,753
In post 5 I said:
Quote:
It is in your favor that you are in the "wide open spaces."
The lack of vegetation can improve your chances.

To quote Calaveras:
http://www.avsforum.com/forum/25-hdt...l#post34113986
Quote:
Here's a specific example I have for a station with no vegetation issues.

KACA is a low power station in the northern San Joaquin Valley with its antenna 460' above the ground. Attached is the TV Fool terrain plot showing this is a one edge path, 51 miles away and only 6.5 KW ERP towards me. There is no vegetation along the path except on the one ridge the signal passes over which is about 15 miles away. With antenna gain and system noise figure taken into account TV Fool predicts a Noise Margin of -4 dB. I should not be able to receive this station under nominal conditions. But I do receive this station and the measured noise margin is +21 dB. The SNR is almost always in the range of 24 - 28 dB. I don't know why TV Fool is under predicting this station by 25 dB but this is what I find in almost every case when there is no vegetation blocking the signal.
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