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, 29 December 2023
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Steve Donaldson10:18 PM
nick horrex: If you haven't already done so, then as per Chris.SE's advice, get a 700MHz filter from Restore TV. It could prove to be mobile phone interference, and it is best to have a filter installed so it can't cause issues.
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Monday, 1 January 2024
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nick horrex11:02 PM
Steve / Chris.
Thanks for all this. I am not as expert as you two, so please tell me why ch 37 should be more affected than others? You are saying 37 may have less power in my direction? If so, why does the site not say so? As for tropo, There has been some lately now and then, I know because if I swing the aerial round to Dover I pick up two muxes. But I do my tests when I cannot pick up Dover, with the same results.
This filter is designed only for C37? I thought mobiles etc now used the channels which were taken away from freeview, [49 upwards.]
Does any of this explain why 37 is so fussy that the aerial be so pinpointed on the transmitter whilst the other channels allow several degrees either way?
It is the signal quality, not strength, that lets me down....sudden drops from 80 to 30.
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Tuesday, 2 January 2024
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Chris.SE6:30 AM
nick horrex:
You are correct in that the channel usage for mobile is above 49 but it is the reception of such strong signals from a mobile cell that can saturate your tuner and produce all sort of spurious signals as a consequence, which can interference with the other channels. Yes we would have expected the channels closer to 49 to be more affected but it seems that's not always the case in practice.
Get the Free Filter.
The Quality figure dropping is an indication that the signal is getting corrupted and that the set's decoder is having to work a lot harder to correct the errors and it will eventually reach a point where it can't correct enough of them and your either have bad pixellation or complete loss.
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Chris.SE6:39 AM
nick horrex:
I meant to add I tried to do a bit of research to see which other transmitters you may more easily "see" in more "normal to slight lift" conditions. I didn't have time to do as thorough or exhaustive an investigation as maybe it would be nice to do, and one of the website tools I was using has pre-B700 channel numbers (which is where I think the spurious Heathfield info came from!). Oxford is certainly one possibility for C37.
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Steve Donaldson5:14 PM
Chris.SE: I've just been reading back the discussion we had at the end of September where I pointed out that Mont Lambert, near Boulogne, uses C37.
In terms of transmitters in the Netherlands, the Dutch regulator has a look-up and this shows just one C37 transmitter, and it is in Den Burg, North Holland. It is 7.9kW and VP. Den Berg also uses channels 29 (8.5kW), 31 (7.9kW), 34 (7.9kW) and 48 (5kW).
The look-up for TV and DAB broadcast transmitter channels is here:
https://appl.agentschaptelecom.nl/dav/index.html
This is on the website of the former Agentschap Telecom [Radiocommunications Agency of the Ministry of Economic Affairs and Climate]. On 1 January 2023 the Agentschap Telecom was renamed 'Rijksinspectie Digitale Infrastructuur' (RDI) [Authority for Digital Infrastructure].
The aforementioned look-up is linked to from the RDI website on this page (at the bottom of the main content), implying it hasn't yet been incorporated directly into it and is still current information:
https://www.rdi.nl/onderwerpen/radio-en-televisie/digitale-omroep
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Chris.SE5:23 PM
Steve Donaldson:
I'm afraid I can't get either of those sites to produce anything useful. I get -
"The requested URL was rejected"
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Steve Donaldson5:55 PM
Chris.SE: I'd not heard of the message 'The requested URL was rejected'. Putting it into a search engine shows it's a common one and could result from different issues, including cookies, router and DNS cache. The websites definitely exist and it would seem to be something related to your connection, network or device.
Leaving these possibilities aside, assuming you don't normally visit .nl sites, I wonder if there is something blocking them, either on the device you are using or your router. Could something like a firewall, internet security software or parental filter be blocking it? Perhaps a parental filter is set to only permit commonly-used top-level domains such as .co.uk, .com, .org and .tv, but is restricted for other countries' top-level domains. It might be worth trying other .nl domains, a few examples being google.nl, amazon.nl and ebay.nl.
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Chris.SE6:34 PM
Steve Donaldson:
Nope, never had any problems with .nl sites. Stupid thing was that the first link appeared to work first time. Must have been a passing glitch as it's all working now.
Once nick has a filter installed it'll be possible to re-assess the situation.
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StevensOnln16:54 PM
Steve Donaldson: Both links you posted are working for me, not sure why Chris is having trouble accessing them.
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nick horrex7:30 PM
Chris and Steve,
Thank you for your efforts. I will see if I can get a free filter though I really cannot believe low power xmitters in Holland are doing this, particularly when there is no tropo and they are also using other Sudbury channels.
I assume that on the mast, each mux has its own aerial. Could 37's be lower?
Yes, when the quality figure suddenly drops it first pixelates then disappears.
I have to have the aerial spot on to get 37. It is far more fussy than the other channels. [I am speaking re quality. The signal strength is not nearly so fussy.]
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