The gain setting of the receiver’s low noise amplifier (LNA) is adjustable.By default,the 250 Series is factory-configured to use its internal automatic gain control (AGC) circuit to manage receiver sensitivity.Reducing the gain increases the linearity of the receiver
The module contains an AGC circuit that manages these settings
automatically, and it should be used whenever possible. However, when
attempting to make analog RSSI measurements, fixing the LNA gain
produces more meaningful results. Digital RSSI readings are internally
compensated and may be taken with AGC enabled