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Freeview modes

Four of the Freeview multiplexes (collections of channels) broadcast in one mode known as "16 QAM (3/4)", and the other two broadcast in another mode called "64QAM (2/3)".

Four of the Freeview multiplexes (collections of channels) broa
published on UK Free TV

Two of the Freeview multiplexes (collections of channels) broadcast in one mode known as "64QAM mode, FEC=2/3,", and the other three broadcast in another mode called "64QAM mode, FEC=3/4".

The " FEC=2/3" mode provide a more reliable signal than a "FEC=3/4" mode signal at the same power level, but there is a trade-off that means less digital data can be carried.

This diagram shows the current channels carried on the Freeview system. The wider the box, the more bandwidth is used to carry the pictures. The more bandwidth used for a service, the better the picture quality.

Boxes split horizontally denote channels that occupy the bandwidth at different times of the day.

The third line shows the configuration of the BBC "B" multiplex switchover which is used for HD and is in another mode DVB-T2 256QAM.

64 QAM (3/4) mode

In this mode, the digital TV signal is transmitted in groups of 64 symbols. The "forward error correction" is 2/3, and this results in a bitrate of 24M.1b/s (megabits per second). This can be used to carry up to eight simultaneous television channels.

64 QAM (2/3) mode

In this mode, the digital TV signal is transmitted in groups of 16 symbols. The "forward error correction" is 3/4, and this results in a bitrate of 27.1Mb/s. This can be used to carry ten simultaneous television channels.

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In this section
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Monday, 3 January 2011
9:21 PM

I live in Beeston Nottingham and recently our signal on the Multiplex 2 channels has been variable. Sometimes it is fine, sometimes fuzzy and sometimes our tv just says no signal. Tonight there is no signal for these channels and i just tried retuning the TV and it did not find any of the mulitplex 2 channels. Is it a local signal problem or something wrong with out TV? We have a Samsung with built in freeview. Any help greatly received! thanks

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Jen's 2 posts GB flag
Jen's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
Wednesday, 5 January 2011
2:15 PM

I have just moved into Barrow In Furness (Cumbria) and my house uses the Town Hall Antenna. It does not pick up all freeview channels. By using this sight I found out it only broadcasts the following MUXES PSB1(BBCA), PSB2(D3+4) and PSB3(BBCB). Does anyone know if the additional MUXES (therefore channels) will be added in future? or where or who I need to ask.

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Phil's 1 post GB flag
Phil's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage

6:38 PM

Phil: According to the Digital UK postcode checker you should be able to receive all six muxes with good reception direct from Winter Hill. Use a group C/D receiving aerial set for horizontal polarisation. The Town Hall relay is a PSB only transmitter.

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KMJ,Derby's 1,811 posts GB flag
Neil Smith
7:17 PM
High Wycombe

Lost our signal today according to main TV but portable reported aerial overload.Bypassed our signal booster and am now running 2 TVs using a Y splitter.Has there been an increase in transmitter power?
Postcode HP10 9EY

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Neil Smith's 1 post GB flag
Neil's: mapN's Freeview map terrainN's terrain plot wavesN's frequency data N's Freeview Detailed Coverage
Thursday, 6 January 2011

9:57 AM

Neil Smith: No, you have simply found out that signal boosters ruin digital TV signals.

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Briantist's 38,915 posts GB flag
Saturday, 8 January 2011
7:55 AM

I've just lost all HD channels from my built in freeview TV (Toshiba Regza). Has been working fine for a month but now no signal, rescan failed to pick the channels up at all. I'm in Twickenham. Any ideas?

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Russell's 3 posts GB flag
Russell's: mapR's Freeview map terrainR's terrain plot wavesR's frequency data R's Freeview Detailed Coverage
Wednesday, 12 January 2011
9:33 PM

I've lost most channels (ITV mostly). I have rescanned and the EPG no longer shows the missing channels. Any ideas?

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Ian's 2 posts GB flag
Thursday, 13 January 2011
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