Patent ID: 6437730
Filing Date: 2002-08-20
Classification: G01S

Abstract:
A method of checking designed for an FM/CW type radio altimeter having a transmission port and a reception port to which there are respectively connected a transmission antenna installation and a reception antenna installation, the radio altimeter comprising a linear oscillator to give a saw-toothed signal, with a link to the transmission port, a mixing circuit with two links, respectively to the oscillator and the reception port, and a processing unit to process the output signals from the mixing circuit wherein, to check at least one of the two installations, the method consists of the transmission, from the radio altimeter to the installation to be checked, of an incident signal and the examination, in the processing circuit, of the signals reflected by this installation to be checked, this examination pertaining to the position and the amplitude of the lines of the spectrum of the signal given by the mixing circuit.