User's Manual

UM-0825 21
far from that; this is the best operating condition because you are getting the maximum composite output
power available from the Signal Booster.
Anyway is a good practice to increase attenuation (reducing gain), until AGC led turns off, this operation
releases AGC circuitry dynamic range.
Also is a good practice to check signals from donor site to ensure that undesired signals are not being
amplified by the Signal Booster, or even desired signal levels are not excessively high taking Signal
Booster to an overload condition.
Overload Protection
When AGC circuit reaches its limit, the power amplifier stage is shut down to prevent harmful distortion and
potential damage to the Signal Booster. After approximately ten seconds the system checks if overload
condition is still present, if this happens amplifiers will remain off. This cyclic check will continue until condition
that makes AGC circuitry reach its limits disappears.
Conditions that can cause AGC to reach its limits include the presence of one or more very strong channels,
a strong in-band noise source, or amplifier oscillation due to poor antenna isolation.
When overload protection lower row led from UL or DL (or both) will be ON permanently.
Laboratory Measurements
For specific parameters verification and laboratory tests, please contact factory.
Detailed procedures, recommended tests set up, and a knowledge engineering team will bring adequate
support to perform this measurements in a comfortable and safely way.