Full Freeview on the Sandy Heath (Central Bedfordshire, England) transmitter
Brian Butterworth first published this on - UK Free TV
Google Streetview | Google map | Bing map | Google Earth | 52.130,-0.242 or 52°7'47"N 0°14'33"W | SG19 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.
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Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)
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.
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?
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
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?
1965-80s | 1984-97 | 1997-98 | 1998-2011 | 2011-13 | 12 Feb 2020 | ||||
VHF | A K T | K T | K T | W T | W T | ||||
C6 | ITVwaves | ||||||||
C21 | C4waves | C4waves | C4waves | +BBCB | BBCB | ||||
C24 | ITVwaves | ITVwaves | ITVwaves | D3+4 | D3+4 | ||||
C27 | BBC2waves | BBC2waves | BBC2waves | BBCA | BBCA | ||||
C31 | BBC1waves | BBC1waves | BBC1waves | ||||||
C32 | com7 | ||||||||
C33 | SDN | ||||||||
C34 | com8 | ||||||||
C35 | _local | ||||||||
C36 | ArqA | ||||||||
C39 | C5waves | C5waves | |||||||
C43 | _local | ||||||||
C48 | ArqB | ArqB | |||||||
C51tv_off | SDN | ||||||||
C52tv_off | ArqA | ||||||||
C55tv_off | com7tv_off | ||||||||
C56tv_off | COM8tv_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
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Thursday, 31 March 2011
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Mike Dimmick1:55 PM
Reading
Mrs L Hardy: Can you provide a full postcode please?
If everything worked before switchover, there's a chance that signals are now too strong rather than too weak. If you have any amplifiers, try removing them, or turning down if it's adjustable. If that doesn't help, or there aren't any, try adding an attenuator.
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Mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
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Robert Robinson2:37 PM
hi
Have been receiving digital signals on BBC - ITV etc for the last 5 years - but have lost all BBC stations yesterday - I have a Samsung Digital Terrestrial receiver S1R-U200iinto an analogue Sony TV - I have retuned the receiver several times -no luck - is it a case of having a new TV or freeview box - thank you regards Robbie
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Bain3:29 PM
Bedford
Mike: Thanks for the response. I would imagine that all the cables are coax rather than satellite grade, so that would probably explain the problem.
The issue now then I guess it the fact that all the cables are built into the walls and the loft floor, so replacing them is going to be a pretty big job.
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Bain's: mapB's Freeview map terrainB's terrain plot wavesB's frequency data B's Freeview Detailed Coverage
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Mike Dimmick4:26 PM
Robert Robinson: I'm afraid this box is on the list of 2K-only equipment at http://www.digitaluk.co.uk/2kequipment . It can't be fixed with a software upgrade. You'll need to get a new Freeview box.
The new multiplexes use an 8K mode which is more robust when reflections are picked up. It's also the mode that most other countries are using. We're fairly unique in ever having used 2K mode. New boxes should all support 2K and 8K modes. (RG47SH)
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Richard11:38 PM
Until yesterday, I was able to receive all freeview channels I know of. Like Mrs L Hardy, yesterday I stopped being able to receive BBC1,2,3, but continued being able to receive channels on other multiplexes. I can currently receive a total of 90 channels, but no BBC1,2,3. I have a signal booster, but turning this off causes many other channels (eg, ITV1,2,3) to become unavailable, and doesn't bring BBC1,2,3 back (including after a rescan); without the booster on, I can still receive BBC 4, Film 4, Dave, etc (56 channels in total).
I'll try getting hold of an attenuator; hopefully the problem is that BBC1,2,3 are now too powerful, but the other channels which haven't been boosted yet are still too weak. Hopefully after the other channels are boosted, I'll just need an attenuator, and no longer need the booster.
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Friday, 1 April 2011
T
Trevor11:32 AM
30 March 2011 : Cambridge-area Freeviewers lost Quest (38), Russia Today (85), AlJazeera (87), Yesterday (12) and others.
Will they be reinstated on 14th April?
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Rob3:39 PM
Will the signal strength for the ITV group of channels be increased in the near futue? I am currently unable to see these signals but get perfect BBC channels.
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David Howard3:54 PM
Northampton
I've recently been given a digi-box (Goodmans GDR-10)which I thought would be handy for the upstairs TVs following the switchover. Existing set-up is: Skydish for the main lounge TV,2 x professionally-installed roof aerials aligned to Sandy Heath and Sutton Coldfield also serving the main TV, and a D-I-Y loft aerial aligned to Sandy Heath serving the upstairs TV. Original plan was to re-route the roof aerials post-switchover to the bedroom TV(s).
Tried the digi-box yesterday & got good reception on Ch 27 and patchy on one or two other channels using the roof aerials,also good on Ch 27 (but nothing else) from the loft aerial. Having spent a couple of hours on this very helpful site I've decided my best bet is probably to wait until after 13th April and then see how things look before spending any time/money on aerial re-routes / upgrade? Secondly, although I seem to be equi-distant from 4 transmitters the aerials I have do seem to be aligned on the best two ie Sandy Heath and Sutton Coldfield but will there be any "interference" problem during the period April to September when one has switched over to digital & the other hasn't? Or will the stronger digital signal simply "swamp" the analogue one?
Any comments will be gratefully received.
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David's: mapD's Freeview map terrainD's terrain plot wavesD's frequency data D's Freeview Detailed Coverage
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