SIGNAL RECEIVER ON VEHICLES PARTICULARLY ON RAIL CARS, RECEIVING SIGNALS TRANSMITTED ACCORDING TO UIC STANDARDS

摘要

A receiving device for signals which are transmitted at alternating equidistant transmission frequencies on the basis of the IUR standard by transmitting aerials along a route, has an input part (4-11) of broad-band design for all the signal frequencies to be received, to which receiving channels (12-14), the number of which corresponds to the number of signal frequencies to be received and in which the signal frequencies are transposed downwards in mixing stages (16-20) and then amplified and demodulated in amplifier-demodulators (26-28), are connected via narrow-band filters (15-17). On the one hand, the demodulated output signals are fed directly to a switching matrix (32) and, on the other hand, are used for the derivation, via quality and/or quantity evaluation stages (33-35 and/or 39-41), of control signals in digital form which are applied to the switching matrix (32), so that the latter supplies the best signal at the output (45). IMAGE