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天线是电视接收机的重要组成部分之一。性能优良的电视机,在正常接收环境中,只要使用本机天线,就能获得满意的图象和伴音。如果画面上不时飘过点点“雪花”,或者伴音轻弱,则可加上室内天线,定能弥补美中之不足。假若画面浑浊,对比度低,“雪花”纷飞,几乎听不到伴音,或者图象出现“重影”,无法调整同步,此时只有架设室外接收天线,才能改善收看效果。所以,合理选用电视天线,是收看好电视的关键。
Antennas are an important part of television receivers. Excellent performance of the TV, in the normal reception environment, as long as the use of the local antenna, you can get a satisfactory image and sound. If the screen drifts a little “snowflake” from time to time or if the sound is weak, indoor antennas can be added to make up for the deficiencies in the United States and China. If the picture is muddy, the contrast is low, “Snowflakes” are flying, almost no sound is heard, or the image appears “ghosting”, and the synchronization can not be adjusted. In this case, only the outdoor receiving antenna is erected to improve the viewing effect. Therefore, the rational use of the TV antenna is the key to watching TV.