Dual tuner using for satellite broadcasting receiver

摘要

PURPOSE: A dual tuner for a satellite broadcast receiver is provided to eliminate influences of broadcast signals from another antenna when a user uses broadcast signals from one antenna. CONSTITUTION: A first tuner unit(170) selects a channel a first broadcast signal and a high frequency signal of a second broadcast signal. The first broadcast signal is outputted from a first route adjusting unit(150). The first tuner unit converts a first broadcast signal or a second broadcast signal of the selected channel into an intermediate frequency signal. A second tuner unit(180) selects a channel in a high frequency signal of a first or second broadcast signal. The first or second broadcast signal is outputted from a second route adjusting unit(160). The second tuner unit converts the first or second broadcast signal into an intermediate frequency signal. [Reference numerals] (130) First damper; (140) Second damper; (170) First tuner unit; (180) Second tuner unit; (210) First demodulation unit; (211) MICOM; (220) Second demodulation unit; (221) MICOM