Get RSSI as PPM PWM SBUS IBUS
The elemetry values Error and SNR can be used as channel input
to provide signal quality information back to the Rx, and to the
Flight controller/On-screen display without additional hardware.
The set-up can be done in the Key ⭢ Aux Channels menu.
Selecting Err will use error rate. Channel value is calculated as:
Error = 0 ⭢ Channel value 2000
Error = 100 ⭢ Channel value 1000
In case of SNR a logarithmic scale is being used: the highest SNR seen
since power-on is being used as reference signal.
