Andrew Wireless Innovations Group MRB-LMR User Manual

In most cases, the repeater gain is adjusted to make the uplink gain equal to
the downlink gain to maintain a balanced link.  Adjust the repeater gain, leave
the MR Booster LNA gain set to maximum, and the overall system noise
figure is minimized.

In cases where unusually strong in-band interferers are present, it may be
necessary to decrease the LNA gain in order to increase the overall system
input intercept point. The amount of attenuation added depends on the
required system intercept point, the maximum allowable system noise figure,
and the dynamic range of the repeater.