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README.md
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@ -3,6 +3,8 @@ A TX-only [TNC](https://en.wikipedia.org/wiki/Terminal_node_controller) (Termina
An analog line-out audio signal will be produced at GPIO-pin 'GP0'. You can observe it by using a scope, listen to it by using an audio amp, or connect it to any RF transceiver to send it on the air (ham radio license required).
![AFSK scope screenshot](https://github.com/eleccoder/raspi-pico-aprs-tnc/blob/main/doc/img/afsk_scope.png "Scope screenshot of an AFSK output signal")
Basically, this is the data/signal flow:
```
@ -11,7 +13,6 @@ APRS (text msg + geo-coordinates + meta-data) -> AX.25 -> PCM -> PWM -> Band-Pas
Both a static library `libaprs_pico.a` and an example application will be generated by the build.
![AFSK scope screenshot](https://github.com/eleccoder/raspi-pico-aprs-tnc/blob/main/doc/img/afsk_scope.png "Scope screenshot of an AFSK output signal")
## Preliminaries