HIGH FREQUENCY CHANNEL TUNING DEVICE

摘要

PURPOSE: A high frequency channel tuning device is provided when receiving a satellite broadcasting particularly when signal processing of a high frequency front-to-back terminal, to eliminate an interruption of an unwanted signal of a neighboring channel around 300 MHz, an interruption of an image signal located on the upper part by the medium frequency than the wanted signal, and other prospective unwanted signals occurring in other band. CONSTITUTION: The high frequency channel tuning device includes a first tracking filtering means for receiving a high frequency channel from antenna and removing an unwanted signal according to the low band tuning point; an amplifying means for amplifying the output from the first tracking filtering means; and a second tracking filtering means for receiving the output the amplifying means and removing the high frequency interruption signal according to the high frequency tuning point.