The analog TV signal is difficult to see and to find it but when we know the range of signal that makes everything is easy so, the range of digital TV closes to analog TV.
An advantage digital TV has over analog TV is that analog signals cannot be compressed as well as a digital signal can because a moderately weak signal becomes snowy and subject to interference. The first peak of analog TV is sending picture and next is voice but other small signals are noise. To transmit an image on analog TV, every pixel is included in the signal.
The limited devices and sheet are little problems.
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