On Fri, Mar 12, 2010 at 12:05 AM, [email protected]
<[email protected]> wrote:
> "Theoretically", it starts automatically when an APT start sequence is
> detected. I do not know how to enhance the process at the moent. Maybe a
> better filter. The APT frequency has some margin, but if it is too large, it
> starts decoding each time 300 hz is detected in noise. So, the method should
> be refined.

Instead of comparing the 300Hz power to a constant threshold, compare
it to the power in nearby bins in order to determine S:N power at
300Hz. That should be self-adjusting.


-- 
73 de Brian, WB6RQN/J79BPL
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