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问:如何提高电视机对汽车打火干扰的抗干扰能力呢? 答:沿马路两旁的低层楼房和平房,当汽车通过时,电视图象就会出现讨厌的干扰带,影响收看效果。这种干扰随汽车种类不同而不同。随每分钟通过辆数的增加,干扰的次数也增加。这种干扰虽然重复频率在几十到几百千周,但是其干扰带宽可达几百兆到千兆以上,但随着接收频率的增高干扰会降低。同时随汽车与接收点(电视机)的距离的增加而大大减弱。因此,存在这种干扰的电视机可以增设室外天线,使天线振子和所通过汽车的距离在20米以上,将达到显著的改善效果。天线越高,效果会越好。
Q: How to improve the anti-jamming ability of the TV set for car ignition disturbance? A: The low-rise buildings and bungalows along the road are annoying interference bands when the car passes, which will affect the watching effect. This type of disturbance varies with the type of car. As the number of vehicles passed per minute increases, the number of disturbances also increases. Although the repetition rate is tens to hundreds of thousands of weeks, the interference bandwidth can reach several hundreds of megabytes to a few gigabytes or more, but the interference decreases as the receiving frequency increases. At the same time with the car and the receiving point (TV) distance and greatly reduced. Therefore, the existence of such interference TV set can be an outdoor antenna, the antenna and the car through the distance of 20 meters or more, will achieve significant improvement. The higher the antenna, the better the effect.