Quote:
Originally Posted by ShortyT
Is that 18 dB above the strongest co-channel interference?
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It depends on the NM value of the stations.
A NM of more than 30 db means that the difference between stations can be as little as 16 db. A NM that is a minus number would require an NM difference of almost 19 db.
Of course propagation changes constantly, especially when the signals are 1 or 2 edge as they often are. So in a practical sense, the goal should be 10 db extra margin for reliable reception, or roughly 28 db.