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[aprssig] Min Required Rx Threshold?

Robert Bruninga bruninga at usna.edu
Thu Jun 23 23:17:31 UTC 2005


>>> pdevanney at rogers.com 06/23/05 5:24 PM >>>
>I am using Radio Mobile to estimate digipeater coverage.
>
>Does anyone know Minimum Receiver Threshold 
>values that would be appropriate for 1200 and 
>9600 baud packet, that will provide for "decent" copy.

Measured with two separate D7 and D700 and results
were -122 dBm for 1200 baud and -115 dBm for
9600 baud.  But be aware, it can be 20 dB worse 
with a poorly set up local digi.  And believe me,
there are an awfully lot of poorly set up systems
out there... distorted tones, overdriven transmitters
improper skew etc...

Bob

TIA

Peter
VA3YOW





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