Patent ID: 8358974

Claim:
A method for amplitude modulation of a carrier signal with a specified modulation factor, according to which method a digital carrier signal is conducted from a transmitter output through an impedance matching block to a connecting terminal of an antenna, characterized in that an amplitude of said carrier signal at the output of the impedance matching block is measured as a first amplitude value, that a value of the signal amplitude at the output of the impedance matching block is calculated as a second amplitude value, which should be assumed in a modulated low-level carrier signal section by the signal resulting from amplitude modulation with said modulation factor from said carrier signal having an amplitude equal to the first amplitude value, that a transmitter setting is changed to decrease the carrier signal amplitude at the output of the impedance matching block, that an amplitude of a new carrier signal at the output of the impedance matching block is measured as a new amplitude value, that the transmitter setting keeps changing so many times until the new amplitude value is equal to or lower than said second amplitude value or is within a predetermined tolerance range around said second amplitude value and that parameters of the last new transmitter setting are stored as the parameters of the transmitter setting in the modulated low-level carrier signal sections for transmitting a signal being amplitude-modulated in the specified manner.