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Analogue and digital signal strength

The strength of an analogue signal is no guide to the strength of a digital signal

The strength of an analogue signal is no guide to the strength
published on UK Free TV

Many people ask why they can receive an OK analogue picture, but need to upgrade their aerial to get Freeview, or sometimes get perfect Freeview reception when the analogue picture is very poor.

The digital signals are currently broadcast at low power (this will change as switchover happens) to prevent interference with the existing analogue signals. Thankfully most Freeview boxes can work with these weak signals. The following list shows the strength of the digital signal compared to the analogue for the 80 Freeview transmitters.

Expr2 Aberdare: 15%
Angus: 2000%
Beacon Hill: 1%
Belmont: 1.43%
Bilsdale: 1.15%
Black Hill: 4%
Blaenplwyf: 1.66%
Bluebell Hill: 8.88%
Bressay: 10%
Brierley Hill: 1.22%
Bristol Kings Weston: 4.5%
Bromsgrove: 1550%
Brougher Mountain: 0.5%
Caldbeck: 0.82%
Caradon Hill: 0.76%
Carmel: 2%
Chatton: 4.16%
Chesterfield: 1.8%
Craigkelly: 2%
Crystal Palace: 2%
Darvel: 2%
Divis: 0.49%
Dover: 1%
Durris: 2%
Eitshal: 0.8%
Emley Moor: 0.93%
Fenham: 1%
Fenton: 0.5%
Guildford: 1%
Hannington: 4%
Hastings: 18.3%
Heathfield: 1.2%
Hemel Hempstead: 2%
Huntshaw Cross: 3.66%
Idle: 2%
Ilchester Crescent: 4%
Keelylang Hill: 1%
Keighley: 0.91%
Kilvey Hill: 3.83%
Knock More: 1%
Lancaster: 1.83%
Lark Stoke: 416.66%
Limavady: 0.8%
Llanddona: 1%
Malvern: 10%
Mendip: 1.83%
Midhurst: 1.25%
Moel-Y-Parc: 0.41%
Nottingham: 1.85%
Olivers Mount: 9.1%
Oxford: 1.6%
Pendle Forest: 18.2%
Plympton: 9.15%
Pontop Pike: 1.93%
Pontypool: 6%
Presely: 0.83%
Redruth: 1.85%
Reigate: 1500%
Ridge Hill: 2%
Rosemarkie: 10%
Rosneath: 2%
Rowridge: 4%
Rumster Forest: 1.33%
Saddleworth: 1.8%
Salisbury: 6.9%
Sandy Heath: 1.83%
Selkirk: 6%
Sheffield: 1%
Stockland Hill: 1%
Storeton: 2550%
Sudbury: 2.01%
Sutton Coldfield: 0.8%
Tacolneston: 2.66%
The Wrekin: 1%
Torosay: 0.62%
Tunbridge Wells: 1%
Waltham: 1.8%
Wenvoe: 1.16%
Whitehawk Hill: 3.67%
Winter Hill: 1.83%



Help with Freeview, aerials?
How do I get a test card with Freeview1
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
Can my Freeview box receive more than one BBC and ITV region?4
Is it true that my 87 year old mother is entitled to a FREE upgrade when the ana5
[][][
In this section
Should the UK close down the TV networks to allow for more mobile broadband? 1
UK Digital switchover ends - Northern Ireland completes on 24th October 20122
The last day of analogue television in the UK - goodbye PAL3
2 days left of analogue television - goodbye teletext4
3 days of analogue to go - goodbye to NICAM 7285
Changes to Saorview frequencies and power levels, 24th October 20126

Comments
Tuesday, 8 March 2011
W
will morton
10:17 PM
Kilmarnock

Hi, would you please google the following JVC model as it shows the two tv's i have.
I feel we are getting nowhere with my question and on my own i have established they generally do not record BBC 1 from the EPG if the whole unit is not switched on.
Hi i have a JVC LT32DE9BJ 32` E-series HD Ready LCD TelevisionWith 160gb

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will morton's 5 posts GB
Friday, 1 April 2011
S
SAMUEL
9:11 AM

A digital UK jvc lcd has no sound in Kenya only pictures after auto tuning.in Kenya we use analogue reception.

link to this comment
SAMUEL's 1 post KE
Briantist
sentiment_very_satisfiedOwner

7:43 PM

SAMUEL: Kenya uses PAL B/G, the UK uses PAL I, so unless you can change the format you will get no sound.


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Briantist's 38,844 posts GB
Monday, 4 April 2011
P
Peter Musau
8:52 PM

Dear Briantist,

Here's a question for you mate:

on the question of a TV in Kenya ( Analogue Reception) using PAL B/G and having no sound, how does one change the format so that you get sound.

Thank you.

link to this comment
Peter Musau's 1 post GB
Tuesday, 5 April 2011
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

2:38 PM

Peter Musau: Look for an option in the TV's tuning menu to select PAL B/G.

Various different standards for picture information (e.g. number of lines, frame rate, colour encoding) and the location of the sound carrier(s) have been used around the world. See World Analogue Television Standards and Waveforms for full details.

Basically, a TV built for UK/Ireland System I expects to find the mono sound carrier at 5.9996 MHz above the vision carrier. For B/G it's transmitted at 5.5 MHz, so the TV can't find it. NICAM stereo wouldn't not be found either because again it's at different frequencies (I don't know if Kenyan channels use NICAM). The UK has never used middle-side stereo as has been used in Germany (it's the same technique as FM stereo radio uses).

Also, if the TV was only built for the UK, it may only support the UHF band and won't find transmissions in the older VHF Band I and Band III, which I believe Kenya still uses at present. We now don't use Band I and use Band III for DAB radio. (RG47SH)

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Mike Dimmick's 2,486 posts GB
S
steve
sentiment_satisfiedGold

7:35 PM
Wrexham

I won a TV in a night club competition in Singapore, which I subsequently brought back to the UK. Sound separation needed adjusting, which Toshiba were willing to do either free or for very little, so long as I took the TV to the one place in the whole of the UK where they did it - on Acre Lane at the Clapham/Brixton border.

Every bit of 2 miles from my home in Herne Hill!

Even morre irrelevent, I helped set up Toshiba's first ever UK site ~1973

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steve's 1,172 posts GB
Thursday, 14 April 2011
I
Ian Burns
7:33 AM

Hi - I have an ARCHOS TV SNAP-ON. This is a keen bit of kit and software that allows me to pick-up and tune into DIGITAL TV. In Stafford, I can get and record approx 66 channels of DIGITAL TV, but in CREWE and DERBY, I get nothing. Will this change when the DIGITAL Switchover is complete ? Will the DIGITAL Signal be ALOT stronger to all areas when the analogue is finally turned off ?

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Ian Burns's 1 post US
Briantist
sentiment_very_satisfiedOwner

7:35 AM

Ian Burns: Yes, the digital signals will be stronger everywhere and provide the same level of coverage as analogue did.

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Briantist's 38,844 posts GB
Friday, 29 April 2011
J
Jerry Brett
8:05 PM

I have a Humax 9300T and I originally enjoyed pretty good reception on most of the channels I wanted to watch. Last year the reception of C5 and all the C4 and ITV channels went down the toilet before recovering late last year. In the last couple of weeks the reception has gone down the toilet again. I live in North Suffolk and I am using a standard aerial with no boosters. TV is an old Panasonic widescreen CRT model from 1998. Any insight you can give me would be appreciated.

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Jerry Brett's 7 posts GB
S
Steve
sentiment_satisfiedGold

11:52 PM
Wrexham

Plug your postcode in at top right and see what you find.

What experience to others locally have?

The TV matters not so long as it works.

Did you check your box on the list of oines not up to llatest standards? IIRC several Humax are listed.

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Steve's 1,172 posts GB
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