Distortions in the frequency of the video cable

Video cable frequency distortion cable properties of different models for different, different manufacturers, different batches of cable performance is different. Shandong Luneng Taishan Cable Co., Ltd. in a typical 75-7 cable as an example for analysisintroduction. Video signal directly through the coaxial cable transmission, will produce the amplitude attenuationfrequency distortion. The different frequency components of different attenuation, the higher the frequency attenuation more. Amplitude attenuation, caused decrease in contrast. High frequency attenuation caused by definition, reduce. The test shows, the commonly used 75-7 cable 250-300 meters, provision has distortion over our country television standards. Video signal through the cable transmission will cause the low frequency amplitude attenuationhigh frequency distortion, the higher the frequency, the attenuation is greater. At the same time, pay attention to, synchronous head distortion, color synchronous head amplitude decrease.


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