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Full Freeview on the Sudbury (Suffolk, England) transmitter

first published this on - UK Free TV
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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.

This transmitter has no current reported problems

The BBC and Digital UK report there are no faults or engineering work on the Sudbury (Suffolk, England) transmitter.

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

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.

 H max
C44 (658.0MHz)229mDTG-100,000W
Channel icons
1 BBC One (SD) East, 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

 H max
C41 (634.0MHz)229mDTG-100,000W
Channel icons
3 ITV 1 (SD) (Anglia (East 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
C47 (682.0MHz)229mDTG-100,000W
Channel icons
46 5SELECT, 101 BBC One HD East, 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, 109 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

 H max
C29 (538.0MHz)186mDTG-100,000W
Channel icons
20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 38 Channel 5 +1, 41 Legend, 42 Great! Movies Action, 57 Dave ja vu, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 69 HorrorXtra, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 91 WildEarth, 203 CITV, 208 Pop Player, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, plus 16 others

 H max
C31- (553.8MHz)228mDTG-8100,000W
Channel icons
 Smithsonian Channel, 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, 60 Drama +1, 70 Quest +1, 71 That's 60s, 74 Yesterday +1, 75 That's 70s, 233 Sky News, plus 9 others

 H max
C37 (602.0MHz)228mDTG-8100,000W
Channel icons
 Quest Red +1,  Classic Hits, 12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! romance, 73 HobbyMaker, 76 That's 80s, 82 Talking Pictures TV, 83 Together TV, 84 PBS America, 90 Together TV +1, 235 Al Jazeera Eng, plus 19 others

DTG-8 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?

regional news image
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
regional news image
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 WestTransposer1000 homes +1000 or more homes due to expansion of affected area?
WithamTransposer14 km NE Chelmsford.118 homes

How will the Sudbury (Suffolk, England) transmission frequencies change over time?

1984-971997-981998-20112011-131 Aug 2018

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

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. Sudbury was not an original Channel 3 VHF 405-line mast: the historical information shown is the details of the company responsible for the transmitter when it began transmitting Channel 3.

Thursday, 5 July 2012

8:46 AM

Thanks Mark.
Les, I am afraid I still do not follow your reasoning about the sea. I have a shed at the bottom of my garden where I play about with tellies. I cannot get my local transmitter, Sudbury, as there is a tree in the neighbour's garden.
I can, however, get Dover as it comes from a different direction with no tree in the way. There is, however, a wall of sea, probably 50 miles thick due to the curvature of the earth between here and Dover 66 miles away.
What is the difference between that tree and the wall of water?

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Nick's 395 posts GB flag
Nick's: mapN's Freeview map terrainN's terrain plot wavesN's frequency data N's Freeview Detailed Coverage
Dave Lindsay

9:43 AM

Nick: I used Megalithia to plot the terrain between you and Dover:

Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location

The curvature of the Earth would appear to be exagerated which is what I've experienced with Megalithia before over such long distances. What I did then was click the link below the plot to view the map between the two points.

I then found the co-ordinates for the point on the Kent coast where the signal path line intersects; this is at Birchington.

A plot from Dover to this point shows that there is clear line of sight:

Terrain between ( m a.g.l.) and (antenna m a.g.l.) - Optimising UK DTT Freeview and Radio aerial location

Unless there is any obstruction between your house and the coast, then this would appear to suggest that you do have line of sight to the top of the Dover mast.

The curvature of the Earth is said to be 8 inches per mile. This works out as 13.4 metres over the 66 miles.

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Dave Lindsay's 5,724 posts GB flag

10:08 AM

Dave, you are a mine of information.
But why is it when I look out of my window over the sea, I can only see ships, say, 10 miles out at most before the sky meets the sea? Are you saying that if my upstairs window was only 13 metres higher I could technically see Dover?
What effect do you think a sudden sea mist has? Is it like the tree in the neighbour's garden?
When Dover was analogue the picture could go from strong to almost imperceptible in minutes.

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Nick's 395 posts GB flag
Nick's: mapN's Freeview map terrainN's terrain plot wavesN's frequency data N's Freeview Detailed Coverage
Dave Lindsay

12:41 PM

Nick: The horizon is where the ground or sea "meets" the sky. There can be things on the horizon which are effectively "protruding" from the horizon.

Imagine if, after having gone over the horizon, the ship were to sprout a tall mast and fly a flag on it. The height of the flag may be visible over the horizon, even though the ship itself is not visible owing to the curvature of the earth.

The same appears to be true of the top of the Dover mast. Whilst it may not be possible to see it due the air not being clear, there is no land (hill) or other object inbetween it and you when on the top of your house.

It could be that the Kent coastline, and even the high ground on which the transmitter sits, is over the horizon (from your vantage point), but the top of the mast is not.

Visible light is also carried as electromagnetic waves. If you're driving your car at night you have the headlights on and they shine into the distance and on to objects which reflects the light back to you.

The more the mist and fog set in, the more difficult it is to see the objects. Headlights in dense fog result in illuminating the water droplets. The light becomes much more of a "ball" in front of you than a beam shining afar.

Conversely, other drivers see nothing of the radiated light until they are close. This is because the light is no longer travelling as far as it does when visibility is clear.

And so, I imagine that TV reception is much the same. The almost sudden loss of signal is probably down to a sudden mist moving in. The signal is travelling over the sea for over 40 miles.

Imagine what it would be like to look out from the top of the transmitter and see the signal being radiated. On a clear day, the signal will travel and objects a long way away will be visible in the "light" of the signal. When the mist comes in, the electromatnetic energy will end up getting "caught" in the droplets. What will be seen is the "light" reflecting back from the droplets. Those who can normally receive the signal will find that they get nothing or much less "light" than they normally do.

This suggests that you may not have stable reception of the COMs from Dover after all. You may have to listen to the Shipping Forecast to find out whether your viewing may be affected.

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Dave Lindsay's 5,724 posts GB flag

2:12 PM

You are a treasure, Dave.
I wonder why you differentiate the coms, though.
I suppose the fact that the atmosphere in winter is just plain damp also reduces the signal.
I had thought that my current good reception was similar to the fact that those blessed Dutchmen mess us about in summer, ie atmospherics, but presumably not so. I just get a good signal in its own right, with it reduced due to moisture.
I suppose if I play about trying to get an inland xmitter such as Tacolneston I will be less affected by mist etc. To think, you have given me all this time when all these problems might be caused by men playing with the Sudbury xmitter, who knows if they are or if they have finished.

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Nick's 395 posts GB flag
Nick's: mapN's Freeview map terrainN's terrain plot wavesN's frequency data N's Freeview Detailed Coverage
Robert B
3:58 PM

When I checked my signal strength for Sudbury this morning channels: 56, 58 and 60 all come through as 92%. Hope it helps Nick.

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Robert B's 7 posts GB flag
John Stone
4:51 PM

Hi, have been waiting a long time for the power to go up on the 3 commercial mux's from Sudbury, when finally they did last Wednesday the signals were lower than I expected. UHF channel's 56 and 58 were only 30% signal strength but 100% quality and channel 60 was only 10% signal strength and 10% quality (no picture).When I checked yesterday all 3 were up to 55% signal strength and 100% quality. Was there a delay in turning the wick up. The other mux's I'm receiving from Rouncfall at 100%.
Hockley, SS5 4JN

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John Stone's 10 posts GB flag
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Mark Fletcher

5:04 PM

John Stone.Hockley,SS5 4JN.Are you still using a group B (yellow tipped) diplexed aerial for the COM multiplexes from Sudbury itself.That could be the answer to your predicament as such.If it is you will have to either change the group B aerial for a group C/D green tipped aerial,or group E brown tipped semi-wideband aerial for the diplexed part of your horizontally polarised aerial aimed at Sudbury for the SDN,ArqA and ArqB commercial multiplexes.

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Mark Fletcher's 673 posts GB flag
Mark's: mapM's Freeview map terrainM's terrain plot wavesM's frequency data M's Freeview Detailed Coverage

5:34 PM

Thanks Robert, but where are you, roughly, as that makes all the difference to reception?

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Nick's 395 posts GB flag
Nick's: mapN's Freeview map terrainN's terrain plot wavesN's frequency data N's Freeview Detailed Coverage
Friday, 6 July 2012
Robert B
3:59 PM

Nick I'm at Kesgrave, Nr Ipswich. So receiving good quality signal as predicted from Sudbury. I hope you get get something worth watching soon.

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Robert B's 7 posts GB flag
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