Full Freeview on the Sudbury (Suffolk, England) transmitter
 | Google Streetview |  | Google map |  | Bing map |  | Google Earth |  | 52.005,0.786 or 52°0'17"N 0°47'8"E |  | CO10 5NG |
The symbol shows the location of the Sudbury (Suffolk, England) transmitter which serves 440,000 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 Sudbury (Suffolk, England) mast?
Sudbury transmitter - Sudbury transmitter: Possible effect on TV reception week commencing 11/11/2024 Pixelation or flickering on some or all channels 
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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)
The Sudbury (Suffolk, England) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: .
If you want to watch these channels, your aerial must point to one of the 80 Full service Freeview transmitters. For more information see the will there ever be more services on the Freeview Light transmitters? page.
Which Freeview channels does the Sudbury 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)
The Sudbury (Suffolk, England) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: .
If you want to watch these channels, your aerial must point to one of the 80 Full service Freeview transmitters. For more information see the will there ever be more services on the Freeview Light transmitters? page.
Which BBC and ITV regional news can I watch from the Sudbury transmitter?
BBC Look East (East) 0.8m homes 3.2%
from Norwich NR2 1BH, 77km north-northeast (24°)
to BBC East region - 27 masts.
70% of BBC East (East) and BBC East (West) is shared output
ITV Anglia News 0.8m homes 3.2%
from NORWICH NR1 3JG, 78km north-northeast (24°)
to ITV Anglia (East) region - 26 masts.
All of lunch, weekend and 80% evening news is shared with Anglia (West)
Are there any self-help relays?
| Felixstowe West | Transposer | 1000 homes +1000 or more homes due to expansion of affected area? | |
| Witham | Transposer | 14 km NE Chelmsford. | 118 homes |
How will the Sudbury (Suffolk, England) transmission frequencies change over time?
| 1984-97 | 1997-98 | 1998-2011 | 2011-13 | 1 Aug 2018 | |||||
| B E T | B E T | B E T | E T | K T | |||||
| C29 | SDN | ||||||||
| C31 | ArqA | ||||||||
| C35 | C5waves | C5waves | |||||||
| C37 | ArqB | ||||||||
| C41 | ITVwaves | ITVwaves | ITVwaves | D3+4 | D3+4 | ||||
| C44 | BBC2waves | BBC2waves | BBC2waves | BBCA | BBCA | ||||
| C47 | C4waves | C4waves | C4waves | BBCB | BBCB | ||||
| C51tv_off | BBC1waves | BBC1waves | BBC1waves | ||||||
| C56tv_off | ArqB | ||||||||
| C58tv_off | SDN | ||||||||
| C60tv_off | -ArqA |
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 6 Jul 11 and 20 Jul 11.
How do the old analogue and currrent digital signal levels compare?
| Analogue 1-4 | 250kW | |
| SDN, ARQA, ARQB, BBCA, D3+4, BBCB | (-4dB) 100kW | |
| Analogue 5 | (-7dB) 50kW | |
| Mux 2* | (-14.9dB) 8.1kW | |
| Mux B* | (-15.2dB) 7.5kW | |
| Mux 1* | (-15.5dB) 7kW | |
| Mux A* | (-17dB) 5kW | |
| Mux C* | (-22.2dB) 1.5kW | |
| Mux D* | (-23.6dB) 1.1kW |
Which companies have run the Channel 3 services in the Sudbury transmitter area
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Friday, 4 March 2011
Tony Jarvis: There nature is that there they don't exist. They can't, as they would have to take the analogue channels that use the frequencies off air.
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Thursday, 17 March 2011
J
John5:29 PM
Colchester
My reception is on-existent at CO2 7HH
except for BBC channels. I'm happy to wait until switchover, unless you tell me that my aerial in the loft will be insufficient.
Is it worth getting an external aerial now?
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John's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
Friday, 18 March 2011
M
Mike Dimmick4:25 PM
Reading
John: Your loft aerial may turn out to be sufficient. If it's not bothering you, you may as well wait the few months to see how it turns out. If analogue pictures are clear, not fuzzy or ghosting, it'll probably be OK, at least for the public-service multiplexes.
If it's an older model, it may be a Group B type, which works for a specific range of frequencies (C35 to C53). The public-service multiplexes will be within this range, but the commercial multiplexes will be outside it. For loft aerials, it's recommended to stick to a grouped aerial as they give more gain for a given size. A semi-wideband Group E will cover both PSB and COM multiplexes.
You will nearly always get better results from an externally-mounted aerial, as the signal doesn't travel well through walls.
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Mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
Saturday, 26 March 2011
D
Denise9:02 PM
I have two tv's with freeview boxes. Both only receive bbc1 and bbc2 and nothing else. Could this be an aerial or junction box problem. The TV people have been out and said it's because of low strenght from Sudbury but other properties in the area still receive all their freeview channels.
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C
chris 11:21 PM
Ipswich
hi i am at ip6 0hw near ipswich can you tell me if sudbury is the best transmitter for me and if so what setup would give met the best reception
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chris's: ...
Tuesday, 29 March 2011
W
W Butcher5:26 PM
Colchester
I am currently setting up a Freeview system for my elderly inlaws in Tiptree.It seems fine except for ITV1 C4 and C5 which suffer from severe break up.I have been told that after switchover the signal will be increased is this true please?
The post code is CO5 0DZ many thanks
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W's: mapW's Freeview map terrainW's terrain plot wavesW's frequency data W's Freeview Detailed Coverage
M
Mike Dimmick6:56 PM
Reading
W Butcher: power is indeed increased and transmissions generally move to better channels that should be less prone to interference.
Performance is still expected to be variable after switchover completes. Digital UK are predicting that the Dover transmitter may be more reliable at this location.
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Mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
M
Mike Dimmick7:01 PM
Reading
Chris: Digital UK currently shows that you're out of coverage, but predicts that you should get good results on the public service channels from switchover in July. Commercial channels will initially be poor and will be variable from mid-2012.
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Mike's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage
Wednesday, 30 March 2011
K
Kevin Hodges9:01 AM
Chelmsford
Just out of interest what do the + and - signs mean on some of the channel numbers listed in the Transmission Frequencies above please.
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Kevin's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
M
Mike Dimmick12:32 PM
Reading
Kevin Hodges: It means that the centre frequency of the transmission is slightly (167 kHz / 0.167 MHz) above or below the normal centre frequency of that channel.
Before switchover, it's used to get out of the way of an adjacent analogue transmission from the same site. If one channel has an offset, usually the next channel has one as well if it's used at the same transmitter. Mux A has a + to avoid C4 analogue, then Mux 1 has a + because of that, and Mux D because of Mux 1. I'm guessing that BBC One analogue has a reduced lower sideband to avoid clashing with Mux D.
After switchover, it's usually only used to ensure that whatever other system is licenced to operate in the adjacent band doesn't cause problems. You usually see C21 with a + offset to avoid problems with TETRA, for example. C60 has a - to avoid the 800MHz mobile phone band that will be auctioned shortly after switchover completes. Channels 31 to 38 are due to be released (the 'Digital Dividend').
The Caldbeck transmitter therefore uses C30- to avoid whatever gets licensed at 550 MHz upwards (C31). This causes a cascade of each lower service also having a - offset. There's a potential problem for any local service here as it's been allocated C21 which would normally have a + offset, but that would collide with the Scottish BBC service on C22-. That's the most extreme case I'm aware of.
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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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