System for receiving tv signals transmitted by satellite

Details System for receiving tv signals transmitted by satellite System for receiving tv signals transmitted by satellite

H - Electricity

04

N

350/94

H04N 7/20 (2006.01) H03D 7/16 (2006.01) H03J 5/24 (2006.01) H03B 19/00 (2006.01) H03B 21/02 (2006.01) H04H 1/00 (2006.01)

Patent

CA 2035445

The invention relates to a system for simultaneously receiving several satellite-transmitted television channels. This system includes a multifrequency ultra high frequency head (23), placed in an outside unit, of which the inputs are combined with the satellite antennas (7, 10). Wide band demodulation (26) is made possible by an ultra high frequency source (39) controlled by a synthetizer (38). Digital signals transmitted by the linking cable (3) ensure that the synthesizer (38), and therefore the selected television channels, are programmed. An amplitude remodulation (27) provides signals in the 40-860 MHz band, carried by the linking cable (3), for terrestrial antennas. Applications in simultaneous reception of several television channels.

18 ABREGE SYSTEME DE RECEPTION DE SIGNAUX TV RETRANSMIS PAR SATELLITES. L'invention concerne un système destiné à la réception simultanée de plusieurs canaux TV retransmis par des satellites. Ce système comprend une tête hyperfréquence multifréquences (23), installée en unité extérieure, dont les entrées sont réunies aux antennes satellites (7,10). La démodulation (26) large bande est rendue possible par une source hyperfréquence (39) commandée par un synthétiseur (38): des signaux numériques transmis par le câble de liaison (3) assurent la programmation du synthétiseur (38) et donc des canaux TV sélectionnés. Une remodulation en amplitude (27) fournit des signaux dans la bande 40-860 MHz, acheminés par le câble de liaison (3) existant, pour antennes terrestres. Application à la réception simultanée de plusieurs canaux TV. Figure 3

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