AURAL RECEPTION OF INSTRUMENT LANDING SYSTEM SIGNALS.

摘要

The Instrument Landing System (ILS) receiver is coupled to a meter on the instrument panel which gives the pilot a visual reference of his position relative to the glide path and center-line of the runway. A way is demonstrated by which the ILS can in addition be made to electronically supply an audible signal to assist the pilot in his approach to a landing. The outputs from the ILS receiver are voltages whose levels are proportionate to the angular distances from the center-line of the runway and the glide path. These output voltages supply the threshold triggers for a series of Schmitt Triggers. By coupling the Schmitt Triggers into a network of sequentially triggered monostable multivibrators, a pair of signal generators can be made to produce audible signals that identify the aircraft's position. In effect,this system is an intermediary between the Ground Control Approach (GCA) voice system and the ILS.