John
Lv 4
John asked in Consumer ElectronicsTVs · 4 years ago

What happened to the old TV signals?

In 2009, analog TV signals were turned off in favor of digital. What specifically are those signals now being used for?

9 Answers

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  • Steven
    Lv 7
    4 years ago
    Favorite Answer

    The same spectrum is still largely used for TV, ie 6MHz channels starting at 56MHz now carry digital signals. Each 6MHz channel can carry about 29Mbps of data, enough for up to 10 standard definition digital sub channels or two high definition channels, usually one hi-def and maybe 3 standard def channels. These channels appear on digital TVs as their virtual channel number, ie channel 8.1 may actually be on UHF physical channel 42, as well as 8.2, 8.3 etc. In North America the OTA (over the air) standard is ATSC. In Europe they use DBV.

    https://en.wikipedia.org/wiki/ATSC_standards

  • 4 years ago

    Some of the frequencies were allocated to the Digital hubs which is what you get your digital TV on, and others were sold off to mobile phone companies for 4G. However some of those frequencies do conflict with the digital signal in certain areas and so if you live close enough to a 4G mast you might need a 4G filter on your TV to receive Freeview (I presume btw we are talking UK here - other countries might have done other things with the frequencies).

    If you look on Ofcoms website for 471Mhz-847Mhz http://static.ofcom.org.uk/static/spectrum/fat.htm...

  • 4 years ago

    The bandwidth that was being used for analog signals is now being used for the digital ones.

  • 4 years ago

    Brain damaged.

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  • khalil
    Lv 7
    4 years ago

    the tv signals are used now with digital modulation ... on the tv transmission system, you can change some boards to convert it to a digital one ....

    on a digital tv channel (bandwidth 8 Mhz) you can transmit some channels at the same time but on an analog system, you can do ONLY ONE channel.

  • 4 years ago

    The have been sold to aliens from another dimension so they can watch all those old black and white series.

  • 4 years ago

    The spectrum is now turned over to emergency services like ambulance and police use. Some of the frequencies were turned over for some other uses, but I cannot remember what it was.

  • 4 years ago

    Parts of the spectrum they occupied are now used by the digital TV signals, but other parts of the spectrum were flogged off to the mobile phone operators - not as much as governments had intended because Digital has started to go HD and so more of the bandwidth than anticipated is still required for TV!

  • Anonymous
    4 years ago

    The frequency range was made available to mobile phone operators.

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