APRS v1 Page 6

From whuckaba
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So after some playing, it seemed the closest to the 1200/2200 I could get with single tones was using calibration value 127. This produced a 1207 hz low tone (using 1200 Hz only).

Then 2200 tone gives 2212 Hz.


But oddly when both tones are played, they deviate further.(1106,2313)

To check if it was just a fact of that combo, I tested during a packet transmission, and the same results.

So I am tinkering and have found the closest I can get to a 1200 tone (as I would figure this would be the more important tone, is using cal 116).

Still a lot of noise, so I tried it directly from the tt3 to the pc. No real change.