Patent ID: 8195110

Claim:
A method for calibrating an information-signal transmission line, said line comprising means for generating a control signal, means for transmitting information signals controlled by said control signal and an amplifier of said information signals, said amplifier able to be configured according to at least one first gain configuration associated with a first gain value and a second gain configuration associated with a second gain value, wherein the method comprises the following steps: obtaining, for said first gain configuration, a first plurality of first initial values VCAN1(i) of the control signal and, for said second gain configuration, a second plurality of second initial values VCAN2(i) of the control signal; for each of the first initial values VCAN1(i) of the control signal, obtaining a first measured value PMES1(i) of the output power of the amplifier and for each of the second initial values VCAN2(i) of the control signal, obtaining of a second measured value PMES2(i) of the output power of the amplifier; said first and second pluralities of initial values being such that the range of values of a first set formed by the first measured values PMES1(i) of the output power and the range of values of a second set formed by the second measured values PMES2(i) of the output power overlap, for at least one setpoint value called a recovery value PCON(i) of the output power of the amplifier, among the first measured values of the output power, obtaining the first measured value PMES1(j) of the output power closest to said recovery setpoint value PCON(i), among the second measured values of the output power, obtaining the second measured value PMES2(k) of the output power closest to said recovery setpoint value PCON(i); calculating, using a first modelling of the polynomial type associated with said first closest measured value PMES(j), a first calibrated value VCANCAL1(i) of the control signal corresponding to said recovery setpoint value PCON(i); calculating, using a second modelling of the polynomial type associated with said second closest measured value PMES(k), a second calibrated value VCANCAL2(i) of the control signal corresponding to said recovery setpoint value PCON(i); selecting one of said first and second calibrated values according to at least one predetermined criterion; and wherein said step of selecting comprises the following steps: determining a recovery setpoint value, called a switching recovery setpoint value, according to a predetermined criterion or predetermined criteria; for each recovery setpoint value strictly less than the switching recovery setpoint value, selecting the first calibrated value; for each recovery setpoint value greater than or equal to the switching recovery setpoint value, selecting the second calibrated value.