Abstract: The invention relates to a device for simulating bearing signals of the TACAN type, formed by a modulation signal carried by a high frequency signal and resulting from the superposition of two sinusoidal signals of different low frequencies, as well as by spaced apart reference pulse trains, synchronized at emission with said modulation signal and representative of a determined orientation. According to the invention, this device is characterized in that it comprises, on the one hand, at least three signal generators of totally digital design, two of these generators being respectively provided to produce the equivalents of two sinusoidal modulation signals, while the third is intended to produce the equivalents of said reference pulse trains and, on the other hand, a quartz oscillator entirely controlling the functioning of said device and, in particular, that of the three digital generators. The invention is applied to the simulation of a TACAN beacon for testing airborne instruments in an aircraft.

Abstract: The present invention relates to a device for simulating the locating signals of an I L S beacon, said device comprising on the one hand two chains in parallel respectively intended for generating sinusoidal modulation I L S signals, each comprising a digital generator for one of said signals and a digital analog converter provided with an input for controlling the reference amplitude of its output voltage and, on the other hand, an at least partially digital arrangement for producing reference voltages for said inputs for controlling the digital/analog converters. The invention is applicable for testing apparatus on board an aircraft.