Antenna identification data is transferred over a regular channel that is normally used for transferring navigation signals. Modulation of the received signal is used for transferring the portable antenna parameter data. Antenna identifications and parameters are written into a portable antenna module. The antenna module is attached to a radio receiver. The antenna module and the receiver are powered up. The portable antenna module receives radio signals that are amplified in a low-noise amplifier. Then, a level of the output signal is discretely modulated in the amplitude modulator and the signal is transferred to the radio receiver. The discrete fluctuations of the level of the signal are determined in the amplitude demodulator. The fluctuation of the level of the signal carries the information about the identification parameters of the portable antenna module. An analog-to-digital conversion of the determine signal fluctuation is performed in an analog-to-digital converter. The converted digital signal is used for receiving data related to the type and parameters of the portable antenna module.