Circuit device, for transmitting and receiving the satellite television station of national version

摘要

The connection by reading unit (1) sender system and mixing (2). Reading unit (1) by speaker amplifier (6) input be connected to satellite receiver be tuned to sub-carrier frequencies the respective satellite station of true sound and output be connected to the output of the first input first abstract circuit (7) and be connected to the commentators of earphone (9). Microphone (10) is connected to the first input of the first abstract circuit (7) of the first input via button (13) by the output of whose voltage-controlled amplifier of first (3) of control circuit (4) to the second input terminal and the second summary (8) second input terminal is connected to circuit by switching output and the modulator of (14) and generator (5) pilot tone by the first voltage controller amplifier (3) of the first input of the second amplifier (11) and the first bandpass filter (12). The mixing arrangement (2) include third amplifier (15) be connected to satellite receiver be tuned to sub-carrier frequencies the respective satellite station of true sound, output by connect second voltage-controlled amplifier (16) with first input third summary (22). IMAGEcircuit