Patent ID: 8655267

Claim:
A method comprising: receiving, from a cellular base station, a cellular downlink signal; amplifying the cellular downlink signal with a first adjustable gain amplifier by a first amount of gain to provide an amplified cellular downlink signal; measuring, with a first RF power meter, a downlink radio frequency (RF) power level of the amplified cellular downlink signal before the amplified cellular downlink signal is combined with other cellular downlink signals for transmission to a mobile station; receiving, from the mobile station, a cellular uplink signal; amplifying the cellular uplink signal with a second adjustable gain amplifier by a second amount of gain to provide an amplified cellular uplink signal; measuring, with a second RF power meter, an uplink RF power level of the amplified cellular uplink signal before the amplified cellular uplink signal is combined with other uplink signals for transmission to the cellular base station; ascertaining a current load level of a power supply that provides power to the first adjustable gain amplifier and the second adjustable gain amplifier; comparing the downlink RF power level with a downlink RF power level threshold, the uplink RF power level with an uplink RF power level threshold, and the current load level of the power supply with a current load level threshold; and determining, when the downlink RF power level, the uplink RF power level, and current load level of the power supply exceed their respective thresholds, that oscillation is present in a circuit comprising the first adjustable gain amplifier and the second adjustable gain amplifier; decreasing, responsive to determining that the oscillation is present in the circuit, the first amount of gain by which the cellular downlink signal is amplified and the second amount of gain by which the cellular uplink signal is amplified until the oscillation is mitigated; or determining, when at least one of the downlink RF power level, the uplink RF power level, and current load level of the power supply do not exceed their respective thresholds that the oscillation is not present in the circuit; and adjusting, responsive to determining that the oscillation is not present in the circuit and based on the downlink RF power level threshold or the uplink RF power level threshold, the first amount of gain by which the cellular downlink signal is amplified or the second amount of gain by which the cellular uplink signal is amplified.