3 Risk of Receiver ADC Saturation

The TX - RX coupling causes a low-frequency signal at the RX output which can be large enough to saturate the receiver ADC if precautions are not taken. The strength of the receiver ADC saturation depends on:

1. Coupled signal level at RX input:
   • TX backoff
   • RF frequency
   • Transmit and receive combinations under consideration
2. RX Gain setting
3. HPF attenuation:
   • Chirp slope and HPF cutoff frequency configurations

To mitigate this risk, the swing at the receiver output needs to be reduced. This is achieved by the recommendations in the following section.