Sughrue, Mion, Zinn, Macpeak & Seas, PLLC
Frequency variation compensating method for a video receiving apparatus
 Two tuner sections are provided in a video receiving apparatus so that a first tuner receives and outputs a television broadcasting signal desired by a user, a second tuner section executes an automatic fine tuning operation at previously set time intervals to discriminate a deviation of the oscillating frequency of the local oscillating section, and when the deviation of the discriminated oscillating frequency is less than a previously set predetermined value, the local oscillating section of the first tuner section is controlled to continuously oscillate at a present oscillating frequency of the second tuner. When the deviation of the discriminated oscillating frequency is greater than a previously set predetermined value, the local oscillating frequency of the first tuner is controlled in accordance with the deviation of the discriminated oscillating frequency, and when a deviation is produced to the oscillating frequency of the local oscillating section, the television broadcasting signal of a predetermined channel can be compensated for accurate reception by varying the oscillating frequency. 
Samsung Electronics Co., Ltd.
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Jeong Soo
Seo