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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.

Are there any planned engineering works or unexpected transmitter faults on the Sandy Heath (Central Bedfordshire, England) mast?

Sandy Heath transmitter - Sandy Heath transmitter: Possible effect on TV reception week commencing 04/12/2023 Pixelation or flickering on some or all channels Digital tick

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.

 H max
C27 (522.0MHz)291mDTG-180,000W
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, plus 16 others

 H max
C24 (498.0MHz)291mDTG-180,000W
Channel icons
3 ITV 1 (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, 28 ITVBe, 30 E4 +1, 35 ITV1 +1 (Anglia east),

 H max
C21+ (474.2MHz)291mDTG-180,000W
Channel icons
46 5SELECT, 101 BBC One HD Cambridge, 102 BBC Two HD England, 103 ITV 1 HD (ITV Meridian Southampton), 104 Channel 4 HD South ads, 105 Channel 5 HD, 106 BBC Four HD, 107 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

 H -0.2dB
C33 (570.0MHz)291mDTG-8170,000W
Channel icons
20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 38 Channel 5 +1, 41 Legend, 42 GREAT! action, 57 Dave ja vu, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 TRUE CRIME, 68 TRUE CRIME XTRA, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 91 WildEarth, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, 267 Al Jazeera English, plus 35 others

 H -0.2dB
C36 (594.0MHz)289mDTG-8170,000W
Channel icons
 Smithsonian Channel, 11 Sky Mix, 17 Really, 19 Dave, 31 E4 Extra, 36 Sky Arts, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 60 Drama +1, 65 That's Christmas, 70 Quest +1, 74 Yesterday +1, 75 That's 90s, 233 Sky News, plus 11 others

 H -0.2dB
C48 (690.0MHz)289mDTG-8170,000W
Channel icons
 Quest Red +1,  Classic Hits, 12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! christmas, 56 That's TV (UK), 61 GREAT! movies extra, 63 GREAT! christmas mix, 71 That’s 60s, 73 HobbyMaker, 82 Talking Pictures TV, 83 Together TV, 84 PBS America, 235 Al Jazeera Eng, plus 20 others

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 (65°)
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

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.

Monday, 12 September 2011

5:16 PM

Philip Crack: Although the trade predictor indicates that you presently be receiving Mux Ch67(ArqB) OK, the channel these programmes are on, your reception situation should improve in two days time (14th) when Ch67 changes to its final allocation of Ch48.

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jb38's 7,179 posts GB flag

5:20 PM

Mick Tarrant: As this is involves a reception issue, its impossible to give an answer when you havent indicated your location. (Pref: post code)

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jb38's 7,179 posts GB flag
Brian Greensides
8:22 PM

Brian Greensides here. OK Briantist, thanks for the reply, just a couple of things.
What is the significance of the + symbols on channels 21+ and 40+ (are these the different modes)and What mode will they be as of Wednesday(14/9/11) ie 2K or 8K
Thanks once again.

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Brian Greensides's 17 posts GB flag
Brian's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage

9:08 PM

Brian Greensides: +/- denotes that the broadcast has an ofset of +/-166kHz, which is rounded up/down above as 0.2MHz.

All multiplexes are 8k, with the exception of Multiplex A which is 2k until 23rd November 2011.

Modes are listed at the top of the page.

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Briantist's 38,906 posts GB flag
Tuesday, 13 September 2011
Mike Dimmick

1:18 PM

Brian Greensides: Sandy Heath Mux A/SDN and Mux C/ArqA are both in 2K mode; Mux A uses 64QAM 2/3 and Mux C 16QAM 3/4. We *believe* Mux C/ArqA will stay in 16QAM 3/4 2K mode when it moves to C67 tomorrow, despite it taking that channel over from ArqB which has been running in 64QAM 2/3 8K mode since switchover.

Mux A will stay in 2K mode right up to its final channel change on 9 May 2012.

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Mike Dimmick's 2,486 posts GB flag

7:14 PM

TONIGHT - Sandy Heath - ArqB moves from C67 to C48 at 20kW and ArqA moves from C40 to C67 (vacated by ArqB).

Retune required.

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Briantist's 38,906 posts GB flag

8:57 PM

Is the final DSO power level for ArqB only 20kW?? Why is it so much lower than the final power levels for the other muxes (180kW and 170kW?

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Will's 39 posts GB flag

10:13 PM

Will: Yes, that is correct. It is the "bottom of the pile" multiplex so it gets the poorest coverage. It was called "Multiplex D" before which made this clearer.

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Briantist's 38,906 posts GB flag
Mike Dimmick

11:02 PM

Will: No, the final power is 170 kW just like the other two COM multiplexes. It is *currently* running at 20 kW to avoid interference to other transmitters.

The page above says 20 kW because Brian did a bodge to his database, because of the numerous complaints.

20 kW is an inference, actually it has never been explicitly stated that ArqB is running at C67.

The current power level of Mux A and C (not COM5/ArqA as it remains in 16QAM 2/3 2K mode) should be shown as 20 kW.

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Mike Dimmick's 2,486 posts GB flag

11:16 PM

Mike Dimmick: I didn't think I had changed ArqB that way, I thought I had done it via the "Switchover state 9" function which doesn't change the final levels in the database.

But it seems that is what I must have done. Just changing it now.

Sorry for any confusion.

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Briantist's 38,906 posts GB flag
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