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Digital Region Overlap

If you can get a Freeview signal to your box or TV from more than one transmitter, you will get extra channels.

If you can get a Freeview signal to your box or TV from more th
published on UK Free TV

The old analogue TV signals provided lots of nations and regions for the public service channels, and these have large areas of overlap. Places like Yeovil, Basingstoke, Colwyn Bay, King's Lynn, York and Berwick could choose the BBC and ITV services they watched.

The old low power digital TV signals were at very low levels and reception of signals from more than one transmitter was a rare event.

All Freeview boxes automatically scan the available broadcast frequencies looking for channels, and they do this from C21 to C69. Whilst scanning, if a duplicate version of a channel is found, such as another BBC One region, they are placed in the 800-899 channel range.

The 800-899 is easy to access by pressing CH- from 1, and in most programme guides is just a single scroll up.

The transmitters in Wales also put Channel 4 on "logical channel number" 8, because the fourth position is reserved for S4/C.

Quite a few people that use the Winter Hill or Mendip transmitters (or one of the relay transmitter) will probably find that they will now have:

  • 1 BBC One Wales
  • 2 BBC Two Wales
  • 3 ITV1 Wales
  • 4 S4/C
  • 8 Channel 4
  • 16 QVC
  • 72 CITV
  • 86 S4/2
  • 801 BBC One West/North West
  • 802 BBC Two England
  • 803 ITV1 West/Northwest
- or -
  • 1 BBC One West/North West
  • 2 BBC Two England
  • 3 ITV1 West/Northwest
  • 4 Channel 4
  • 16 QVC
  • 72 CITV
  • 86 S4/2
  • 801 BBC One Wales
  • 802 BBC Two Wales
  • 803 ITV1 Wales
  • 804 S4/C


What can I do about this?


There are basically three options.

OPTION 1: Live with it. If the signals are strong enough you get a few extra channels (S4/C has English subtitles). There are techniques for sorting out the channel numbers below, but any future automatic scan will restore the channels to the order you now find them in.

OPTION 2: You can clear the all of the channels from the box and manually scan for the multiplex from only one transmitter. For the details, see the transmitter pages

OPTION 3: If the Freeview box has no "manual add" option, the only technique left is to pull out the aerial, start the automatic scan and insert the aerial just before the lowest channel number appears. For example, Winter Hill this is C54.

Some Freeview boxes will show a "percentage complete" as they scan, under this scheme C21 is "0%", C22 is "2%", C42 is "42%", C54 is about "66%".

Even if you manual scan, many boxes will scan during the night for new channels and may still add channels in the 800-899 range.

Help with Freeview, aerials?
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I would like to know if it is possible to receive UK terrestrial Freeview servic2
I have been told I would receive too much singal from my Freeview tansmitter as 3
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In this section
Official aerial installers guide to the TV spectrum future1
Which free digital TV system will give me the most reliable reception?2
High pressure causing channel loss through "Inversion"3
Freeview reception has changed?4
Two frequency interference 5
Single frequency interference6

Comments
Sunday, 9 January 2011
T
tony
12:42 PM
Harlow

hiya bob i live in harlow essex CM19 5SN....have recently installed a slx 48 element aerial on roof..i have run roof lead to philex 4 way booster from there to lounge freeview tv and bedroom humax 9200t freeview pvr to freeview tv..if aerial leads (with or without booster) are connected straight to freeview tvs there is no problem.but if i put aerial thru humax box the ITV,C4,5,MORE channels are stored(manually)but then if i try to record and watch another tv channel or playback something on hdd the humax loses that itv ,c4,c5 more...the humax signal detection shows 23% strength and 100% quality...aerial is pointing to CP ,but should i be useing hemel.sandy heath,bishops stortford or which transmitter?? i am sure this is a aerial prob

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tony's 5 posts GB
Monday, 10 January 2011
Briantist
sentiment_very_satisfiedOwner

7:58 AM

tony: Your strongest signals come from Crystal Palace, and you should be getting very good reception.

Did you use satellite-grade cable to connect the aerial to the first TV point?

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Briantist's 38,844 posts GB
Thursday, 27 January 2011
J
Jo
2:02 PM

hi there.
why is it when the weather is not so great. a bit windy, and i lose all my itv channels. bbc seem ok.
i have freeview channels only.
am located in the village of Cubert in Cornwall.


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Jo's 1 post GB
Friday, 28 January 2011
Wednesday, 2 March 2011
S
Stephen
11:59 AM

RIGHT DONE WHAT IT SAYS ON HERE AND STILL NO joy still have itv wales and s4c but never had this problem before the manual scan dosnt help and I dont no what the multiplex thing is all about and I cant watch them 800 s channels as its all filth

link to this comment
Stephen's 2 posts GB
Briantist
sentiment_very_satisfiedOwner

2:19 PM

Stephen: The 800-899 channel range is not for "fith", that is 90-99.

800-899 is for dupliate regional versions of channels.

If you want, you can delete all the channels and add in the five/six/seven multiplexes yourself.

link to this comment
Briantist's 38,844 posts GB
Saturday, 21 May 2011
A
Alan
9:31 PM
Redditch

I have purchased one of these DVB T mini tv box by Neostar. Good receiption but cannot get the 5 terrestrial channels. I live in the B98 7LL Sutton Coldfield.

Any ideas

Thanks

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Alan's 1 post GB
Briantist
sentiment_very_satisfiedOwner

10:33 PM

Alan: What is it that you have "good reception" of?

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Briantist's 38,844 posts GB
Wednesday, 15 June 2011
B
Bob W
11:10 PM

Craigkelly transmitter, location KY6

After second stage DSO I can't receive mux NEW7 channels, appear to have a group K aerial, as all other muxes have good reception. Which option would be best, get a wideband aerial fitted, a group C/D diplexed to the existing K band or replace the K band aerial with a logic periodic?

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Bob W's 2 posts GB
Thursday, 16 June 2011
K
KMJ,Derby
sentiment_satisfiedGold

11:12 AM

Bob W. NEW7 does not exist at present, if it ever will. The whole question of local tv services is still under discussion, there is serious doubt as to whether it would be viable.It is also worth noting that in the event of additional services becoming available they would be transmitted at much lower power than the other muxes, and targeted at specific areas. The gain curves for tv aerials show a K band peaks around C52 so would be better than a wide band aerial of similar size for receiving NEW7 if it did become available in your location.

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KMJ,Derby's 1,811 posts GB
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