2.3 Antenna Damping (RSSI Accuracy)

The transceiver or receiver supports strong RF signals in the application with an automatic damping to avoid saturation of the internal Low Noise Amplifier (LNA). Except for ATA5835 and ATA5787, the damping function is implemented in the Single Pole Double Throw (SPDT). The internal firmware corrects the RSSI calculation according to the state of the damping. Take care of the signal strength correction in the absence of SPDT, as the device does not detect SPDT usage. For the two products mentioned earlier, the damping is realized via LNA gain reduction, irrespective of whether the built-in-switch is used or not.