How do FM radio and old analog TV broadcasts operate without lag and how do so many radios/TVs tune in to a broadcast without causing issues?

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There’s only static when the signal is bad and some delay due to the travel time of signals, but analog broadcast never lags or stutters like TV and radio broadcasted over the internet.

Also, what makes it possible for thousands/millions of analog TV’s and FM radios to view and listen to broadcasts without causing issues when TV and radio broadcasted over the internet requires packet scheduling and lots of servers to serve the same number of viewers and listeners?

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Anonymous 0 Comments

This is because analog TV and radio are broadcast. A huge transmitter outputs many kilowatts of radio energy. Almost all of that ends up striking trees, houses, soil and just generating a little heat, or travels out into space and is lost. But some tiny amounts of that energy are picked up by antennas across the reception area. The amount picked up is tiny – milliwatts, microwatts or even picowatts – but it is enough for the receiver to amplify and decode. The circuitry to decode is relatively simple, and works in real-time.

Digital TV is also sent out in a similar way – the digital stream is encoded onto a radio signal, that is broadcast by the transmitter, and picked up by receivers and decoded. Even cable TV and satellite TV works the same way.

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