Radio navigation testing method and device using standard signal measuring and generating equipment

In an automatic testing system comprising a computer driving measuring and generating devices for measuring and generating electric signals, said generating devices being of standard type and each comprising a control interface to be controlled by said computer for respectively generating signals of predetermined shapes, a signal combining device for testing any type of radio navigation equipment using radio navigation signals formed by composite low-frequency signals of complex shape which modulate a high-frequency carrier wave, said signal combining device comprising:

• first connection means connected to inputs and outputs of said generating devices and to a radio navigation equipment under test,
• first switching means for selecting outputs of said generating devices, in order to select low-frequency signals and a high frequency wave,
• combining means for combining with one another signals produced at the selected outputs of said generating devices, in order to combine said low-frequency signals so as to produce a low-frequency signal of complex shape and to modulate said high frequency wave with said low-frequency signal of complex shape,
• selecting means for applying said high frequency wave modulated by said low-frequency signal of complex shape to a selected input of said radio navigation equipment under test, and
• a control interface controlled by said computer for controlling said switching means, said selecting means and said combining means.