eleccoder 2021-08-02 23:31:53 +02:00
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@ -5,7 +5,7 @@ An analog line-out audio signal will be generated by a filter connected to GPIO-
![AFSK scope screenshot](https://github.com/eleccoder/raspi-pico-aprs-tnc/blob/main/doc/img/afsk_scope.png)
Image: Pico's output signal probed by a DSO. We clearly see the 1200 Hz and 2200 Hz tones of the 1200 Bd 2-AFSK.
Image: Line-out signal (see below) probed by a DSO. We clearly see the 1200 Hz and 2200 Hz tones of the 1200 Bd 2-AFSK.
Basically, the data/signal flow is as follows: