Patent ID: 8095089

Claim:
A calibration system comprising: a power selector configured to select a first power level at which a device is to transmit a radio frequency signal to the calibration system, wherein the first power level is among a plurality of power levels at which the device is operable to transmit a radio frequency signal, and wherein the device stores a predetermined calibration value for each of the plurality of power levels; a power meter configured to receive a radio frequency signal transmitted from the device, the radio frequency signal having been transmitted from the device based on the predetermined calibration value associated with the first power level, and measure a power level of the radio frequency signal transmitted from the device; an adjustment circuit configured to, based on the measured power level of the radio frequency signal, adjust the predetermined calibration value associated with the first power level so that (i) a measured power level associated with a radio frequency signal transmitted from the device based on the adjusted predetermined calibration value falls within a predetermined range of the first power level; and an offset circuit configured to, based on the adjusted predetermined calibration value, calibrate each other predetermined calibration value stored for the plurality of power levels other than the first power level without having (i) the device transmit a radio frequency signal based on each other predetermined calibration value stored for the plurality of power levels.