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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...




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