LOW NOISE BLOCK DOWN CONVERTER FOR TRANSMITTING AND RECEIVING A LOW NOISE BLOCK CONTROL SIGNAL AND AN INTERMEDIATE FREQUENCY FOR OUTPUTTING A LOCAL OSCILLATION FREQUENCY USING ONE TRANSMISSION LINE

摘要

PURPOSE: A LNB(low noise block) down converter for transmitting and receiving a low noise block control signal and an intermediate frequency for outputting a local oscillation frequency using one transmission line is provided to transmit both signals through one transmission line by using a multiplexing part and a demultiplexing part.;CONSTITUTION: A low noise frequency converter(200) comprises a demultiplexing part(210), a LNB control part(220), and an RF down converter(230). The demultiplexing part distributes an LNB control signal multiplexed through one transmission line from a base band signal processing part. The LNB control part receives the LNB control signal which is distributed in the demultiplexer and generates one or more LO(Local Oscillator) control signals for receiving a corresponding satellite RF signal. A RF down converter outputs a predetermined intermediate frequency by inputting a local oscillation frequency with a mixer according to the LO control signal which is outputted from the LNB control part.;COPYRIGHT KIPO 2013;[Reference numerals] (110) LNB control signal generation part; (120) Multiplexing part; (130) Satellite beacon signal detection part; (140) Center control part; (210) Demultiplexing part; (220) LNB control part; (230) RF down converter; (231) Local oscillator; (AA) LNB control signal; (BB,CC) IF signal; (DD) RF signal