Digital Region Overlap
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:
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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.
9:39 AM
Reading
Sorry guys Deaf brian took over didnt read they answers properly.... sorry... Yes I have upgraded the combiners to a Labgear F type solid metal with masthead covers.. and Upgraded the mast head and power packs... I have to say... I got all 3 regions from London, Oxford and Hanningtion with no problems..... just older boxes needs time and patience.. But the latest TV and Youview box and one other box.... once tuned in.... asks me Region? i select the Main one i want which is BBC and ITV southern.... London and Oxford is in the 800's.. why i did this.. if one region subtitles failed... go to another one its working there.. I know i am crazy with TV lol
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Rob's: mapR's Freeview map terrainR's terrain plot wavesR's frequency data R's Freeview Detailed Coverage
10:23 PM
Rob: I just noticed i spelt Brian wrong.... sorry Brian dont mean any offence to you.... oopps
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11:35 PM
Rob: So far so good its been in use for a month now almost I am happy to say it works and no cross channel interference
time will tell....
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10:46 AM
Conspiracy theory... Crystal Palace SD signals reduced
28/03/2024 to encourage Freely box sales an wean
people of making archive recordings when Freely
programmes only available for a limited period.
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11:20 AM
Sy: There aren't any Freely boxes available yet. All that has been announced so far for Freely is a couple of manufacturers will be selling TVs with Freely built in and I'm not sure if any have even gone on sale yet.
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12:47 AM
Sy:
And there is No Conspiracy Theory either, the transmitter was and still is currently listed for Planned Engineering with "Possible effect on TV reception week commencing 01/04/2024 Pixelation or flickering on some or all channels" which basically means there can be reduced power or use of the reserve antenna (lower down the mast) from time to time.
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9:15 AM
Chris.SE:
Well, there is a conspiracy theory, Sy presented it! And I think sy may be right!
The BBC has been pushing their iplayer like there's no tomorrow.
It seems obvious to me that they are intent on charging the licence fee for internet connection.
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11:17 AM
nobody: You already need a TV licence to watch most programmes on iPlayer.
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10:58 PM
nobody:
You are talking absolute cobblers. ITV push ITVX, Ch4 push All4 (or whatever they now call it) and Five do the same with theirs! Other Channels push their Players as well.
Just look at the list of Planned Engineering. If Sy had posted on the Transmitter page he would have seen that without looking at the Planned Engineering list.
There's no conspiracy at all.
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