menuMENU    UK Free TV logo Freeview

 

 

Click to see updates

Full Freeview on the Sandy Heath (Central Bedfordshire, England) transmitter

first published this on - UK Free TV
sa_streetviewGoogle Streetviewsa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps52.130,-0.242 or 52°7'47"N 0°14'33"Wsa_postcodeSG19 2NH

 

The symbol shows the location of the Sandy Heath (Central Bedfordshire, England) transmitter which serves 920,000 homes. The bright green areas shown where the signal from this transmitter is strong, dark green areas are poorer signals. Those parts shown in yellow may have interference on the same frequency from other masts.

This transmitter has no current reported problems

The BBC and Digital UK report there are no faults or engineering work on the Sandy Heath (Central Bedfordshire, England) transmitter.

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
_______

Which Freeview channels does the Sandy Heath transmitter broadcast?

If you have any kind of Freeview fault, follow this Freeview reset procedure first.

Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.

MuxH/VFrequencyHeightModeWatts
PSB1
BBCA
 H max
C27 (522.0MHz)291mDTG-3180,000W
Channel icons
1 BBC One (SD) Cambridge, 2 BBC Two England, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 250 BBC Red Button, plus 15 others

PSB2
D3+4
 H max
C24 (498.0MHz)291mDTG-3180,000W
Channel icons
3 ITV (SD) (Anglia (West micro region)), 4 Channel 4 (SD) South ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 South ads, 18 More4, 26 ITV4, 30 E4 +1, 35 ITV +1 (Anglia east),

PSB3
BBCB
 H max
C21+ (474.2MHz)291mDTG-6180,000W
Channel icons
56 5SELECT, 101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV HD (ITV Meridian Southampton), 104 Channel 4 HD South ads, 105 Channel 5 HD, 106 BBC Four HD, 109 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

COM4
SDN
 H -0.2dB
C33 (570.0MHz)291mDTG-8170,000W
Channel icons
12 Quest, 20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 41 Legend, 42 GREAT! movies action, 46 Channel 5 +1, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 74 Dave ja vu, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 203 CITV, 208 POP MAX, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, plus 15 others

COM5
ArqA
 H -0.2dB
C36 (594.0MHz)289mDTG-8170,000W
Channel icons
11 Sky Arts, 17 Really, 19 Dave, 31 E4 Extra, 36 pick, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 57 Smithsonian Channel, 60 Drama +1, 70 Quest +1, 75 Yesterday +1, 83 Together TV, 233 Sky News, plus 8 others

COM6
ArqB
 H -0.2dB
C48 (690.0MHz)289mDTG-8170,000W
Channel icons
 FreeSports, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 88 Classic Hits, 235 Aljazeera English, plus 19 others

DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
DTG-8 64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)

Which BBC and ITV regional news can I watch from the Sandy Heath transmitter?

regional news image
BBC Look East (West) 1.0m homes 3.7%
from Cambridge CB4 0WZ, 29km east-northeast (66°)
to BBC Cambridge region - 4 masts.
70% of BBC East (East) and BBC East (West) is shared output
regional news image
ITV Anglia News 1.0m homes 3.7%
from Norwich NR1 3JG, 119km east-northeast (60°)
to ITV Anglia (West) region - 5 masts.
All of lunch, weekend and 80% evening news is shared with Anglia (East)

How will the Sandy Heath (Central Bedfordshire, England) transmission frequencies change over time?

1965-80s1984-971997-981998-20112011-1312 Feb 2020
VHFA K TK TK TW TW T
C6ITVwaves
C21C4wavesC4wavesC4waves+BBCBBBCB
C24ITVwavesITVwavesITVwavesD3+4D3+4
C27BBC2wavesBBC2wavesBBC2wavesBBCABBCA
C31BBC1wavesBBC1wavesBBC1waves
C32com7
C33SDN
C34com8
C35_local
C36ArqA
C39C5wavesC5waves
C43_local
C48ArqBArqB
C51tv_offSDN
C52tv_offArqA
C55tv_offcom7tv_off
C56tv_offCOM8tv_off

tv_off Being removed from Freeview (for 5G use) after November 2020 / June 2022 - more
Table shows multiplexes names see this article;
green background for transmission frequencies
Notes: + and - denote 166kHz offset; aerial group are shown as A B C/D E K W T
waves denotes analogue; digital switchover was 30 Mar 11 and 13 Apr 11.

How do the old analogue and currrent digital signal levels compare?

Analogue 1-4 1000kW
BBCA, D3+4, BBCB(-7.4dB) 180kW
SDN, ARQA, ARQB(-7.7dB) 170kW
com7(-13dB) 49.6kW
com8(-13.1dB) 49.1kW
Mux 1*, Mux 2*, Mux A*, Mux B*, Mux C*, Mux D*(-17dB) 20kW
Analogue 5(-20dB) 10kW

Which companies have run the Channel 3 services in the Sandy Heath transmitter area

Oct 1959-Feb 2004Anglia Television
Feb 2004-Dec 2014ITV plc
Feb 1983-Dec 1992TV-am•
Jan 1993-Sep 2010GMTV•
Sep 2010-Dec 2014ITV Daybreak•
• Breakfast ◊ Weekends ♦ Friday night and weekends † Weekdays only.

Comments
Monday, 20 June 2011
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

2:06 PM
Dunstable

Adam: UHF reception can vary greatly between locations only a small distance apart, so we really need a full postcode to see the situation for you.

Taking a postcode for the centre of Dunstable (Bing Maps gives a co-ordinate of 51.8858052045107,-0.52066370844841 which nearby.org.uk translates to LU6 3SH), I get a prediction of 100% on the PSB multiplexes, 73% on Mux A, 76% on Mux C and 92% on Arqiva B. This is the estimated probability of finding a location for a rooftop aerial that would give reliable reception, at that postcode. The simplified coverage checker for consumers will show that as 'good' on all six multiplexes (the threshold is 70%).

I would start by bypassing the booster and splitter and seeing what the situation is like on each TV connected individually to the aerial. If you can get all the channels, plug the splitter in without the booster and try again. If you find that you can't get all channels with the booster, but can without, leave it disconnected. Otherwise, check that the booster has just enough gain to offset the loss through the splitter. A 4-way splitter typically drops 8 dB.

It may all just fix itself as the switchover programme completes. The retune in August changes the prediction for Mux A to 97%, while that in mid-September puts Mux C to 93% and Arqiva B to 99%. The November retune and mode change turns Mux C into Arqiva A, for which the new prediction is 99%.

link to this comment
Mike Dimmick's 2,486 posts GB
Wednesday, 22 June 2011
R
Russ Dring
sentiment_satisfiedBronze

1:33 PM
Peterborough

Nigel.

I too have a 37"Panasonic TV with freeview and freesat tuners built-in. I get, from Sandy Heath, 100% signal on all multiplexes and 100% quality on five of them the HD multiplex shows about 20% quality. There has been no pixelating on any picture and there has not been since April 2011.
I also use a Humax HD recorder,the signal quality on all including the HD multiplex is 100%, signal strength between 90% on the PSB channels and about 78% on the comm. multiplexes.
That is using the same source signal, cable etc. so I wonder if the Panasonic TV is not displaying the quality properly on Ch 21? The same could be happening to yours?

link to this comment
Russ Dring's 48 posts GB
R
Robert Dawson
2:39 PM
Northampton

The aerial is outside on 16ft pole. My tv is HD ready and I have an LG full HD dv3 recorder but no HD transmission. What else do I need?

link to this comment
Robert Dawson's 3 posts GB
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

3:42 PM

Robert Dawson: 'DV3' is probably the stylised DVB logo from DVB - Digital Video Broadcasting - Home . The model number is likely to be on a sticker on the back of the unit.

link to this comment
Mike Dimmick's 2,486 posts GB
Saturday, 2 July 2011
B
Bob Archer
8:07 AM

at my location IP27 C67 MUX seems to come & go with the weather???? if it is sunny, the signal is 100%, rain - it's gone completly - all other MUXs are being recieved Fine.

link to this comment
Bob Archer's 12 posts GB
S
Steve
sentiment_satisfiedGold

10:11 AM

IP27 is too vague but according to this
UK digital TV reception predictor
you do not even GET C67!

But 27dBuV/m is a weak signal and 67 end of frequency range. Rain may affect reflected signals

Digital has a "cliff" from good to useless, not a fine gradation.

link to this comment
Steve's 1,173 posts GB
Tuesday, 5 July 2011
B
Brian
8:49 PM

I currently have an old 12 element wide band areal, whilst i noticed all around me have been having hi-gain [contract range] areals i don't feel this is necessary, as i can pick up many channels without connecting the areal, I am therefore considering replacing it with a Log-Periodic Aerial [short 28e]

do any of you technical wiz kids have a view on my decision

thanks

link to this comment
Brian's 2 posts EU
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

11:40 PM

Brian: If the old aerial works, I wouldn't replace it. Going by Justin Smith's aerial tests at Gain (curves), Again , a small log periodic (shown there as 'DM Log') should have more gain in Group A, for the PSB multiplexes, but will have less above C48, where the commercial multiplexes live.

The log periodic is supposedly more resilient to impulse interference, though, so if you find your reception breaks up when cars go past, it may help.

link to this comment
Mike Dimmick's 2,486 posts GB
M
Mike Dimmick
sentiment_very_satisfiedPlatinum

11:57 PM

Steve: DO NOT USE WOLFBANE. It is inaccurate, signal strengths shown are far lower than calculated by the ITU-R line-of-sight equation for known line-of-sight paths. I use Field Strength Calculator which shows a field strength of 81.3 dBuV/m at 66km from a 20kW transmitter on C67. Multiply the field strength shown in V/m by one million, take the base 10 logarithm ['log' on most calculators, not 'ln'] then multiply by 20.

We need a full postcode to see whether there is anything preventing line-of-sight. The Digital UK postcode checker considers how signals travel over the terrain and has factors for buildings and trees.

Bob Archer: If channels on higher frequencies break up when it rains, it often indicates that water is getting into the cables. Check that the seals on any outdoor boxes (such as a masthead amplifier or splitter) are intact and not letting water penetrate. Some aerials have a connection box on the aerial itself, where the cable connects to the aerial, again this needs to be watertight. If the cable has been up for a long time (over 10 years), the outer insulation may have perished due to ultraviolet light exposure and that again allows water to penetrate into the cable.

link to this comment
Mike Dimmick's 2,486 posts GB
Select more comments

Your comment please
Please post a question, answer or commentIf you have Freeview reception problems before posting a question your must first do this Freeview reset procedure then see: Freeview reception has changed, Single frequency interference, and Freeview intermittent interference.

If you have no satellite signal, see Sky Digibox says 'No Signal' or 'Technical fault'

If you have other problems, please provide a full (not partial) postcode (or preferably enter it in box at the top right) and indicate where if aerial is on the roof, in the loft or elsewhere.

UK Free TV is here to help people. If you are rude or disrespectful all of your posts will be deleted and you will be banned.








Privacy policy: UK Free Privacy policy.