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Freeview Light on the Dorking (Surrey, England) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps51.221,-0.327 or 51°13'16"N 0°19'39"Wsa_postcodeRH4 2AW

 

The symbol shows the location of the Dorking (Surrey, England) transmitter which serves 3,700 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 Dorking (Surrey, England) transmitter.

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

Which Freeview channels does the Dorking 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.

MuxH/VFrequencyHeightModeWatts
PSB1
BBCA
 H max
 V -3.1dB
C44 (658.0MHz)
149mDTG-39W
4W
Channel icons
1 BBC One (SD) London, 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

PSB2
D3+4
 H max
 V -3.1dB
C41 (634.0MHz)
149mDTG-39W
4W
Channel icons
3 ITV 1 (SD) (London), 4 Channel 4 (SD) London ads, 5 Channel 5, 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 London ads, 18 More4, 26 ITV4, 30 E4 +1, 35 ITV1 +1 (London),

PSB3
BBCB
 H max
 V -3.1dB
C47 (682.0MHz)
149mDTG-69W
4W
Channel icons
56 5SELECT, 101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV 1 HD (ITV London), 104 Channel 4 HD London ads, 105 Channel 5 HD, 106 BBC Four HD, 109 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
H/V: aerial position (horizontal or vertical)

Are you trying to watch these 43 Freeview channels?

the effected channels
the effected channels
the effected channels
the effected channels

The Dorking (Surrey, England) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: 4seven, 5Action, 5STAR, 5USA, Aljazeera English, Blaze, Blaze +1, CBS Reality, Challenge, Channel 5 +1, CITV, YAAAS!, Dave, Dave ja vu, DMAX, Drama +1, E4 Extra, Film4 +1, Food Network, GB News, GREAT! movies, GREAT! movies action, HGTV, HobbyMaker, ITV2 +1, ITV3 +1, ITV4 +1, ITVBe +1, Legend, PBS America, pick, POP MAX, Quest +1, Quest Red, Really, Sky News, Smithsonian Channel, Talking Pictures TV, TCC, That's TV (UK), Together TV, W, Yesterday +1.

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 Dorking transmitter?

regional news image
BBC London 4.9m homes 18.4%
from London W1A 1AA, 35km north-northeast (19°)
to BBC London region - 55 masts.
regional news image
ITV London News 4.9m homes 18.4%
from London WC1X 8XZ, 37km north-northeast (22°)
to ITV London region - 55 masts.

How will the Dorking (Surrey, England) transmission frequencies change over time?

1984-971997-981998-20122012-1331 Mar 2018-
B E TB E TB E TB E K TB E K T
C41ITVwavesITVwavesITVwavesD3+4D3+4
C44BBC2wavesBBC2wavesBBC2wavesBBCABBCA
C47C4wavesC4wavesC4wavesBBCBBBCB
C51tv_offBBC1wavesBBC1wavesBBC1waves

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 4 Apr 12 and 18 Apr 12.

How do the old analogue and currrent digital signal levels compare?

Analogue 1-4 33W
PSB1≡, PSB2≡, PSB3≡(-5.6dB) 9W
PSB1||, PSB2||, PSB3||(-8.8dB) 4.4W

Which companies have run the Channel 3 services in the Crystal Palace transmitter area

Sep 1955-Jul 1968Associated-Rediffusion†
Sep 1955-Jul 1968Associated TeleVision◊
Jul 1968-Dec 1992Thames†
Jul 1968-Feb 2004London Weekend Television♦
Jan 1993-Feb 2004Carlton†
Feb 2004-Dec 2014ITV plc♦
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. Dorking 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.

Comments
Thursday, 19 April 2012
Transmitter engineering
sentiment_very_satisfiedOwner

10:30 AM

DORKING transmitter - Freeview BBC Digital TV Off Air; DSO related from 12:54 yesterday to 13:27 yesterday BBC Digital TV Off Air; DSO related from 00:23 yesterday to 02:07 yesterday [BBC]

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Transmitter engineering's 138,029 posts xx
Transmitter engineering
sentiment_very_satisfiedOwner

5:28 PM

DORKING transmitter - Freeview BBC Digital TV Off Air; DSO related from 00:23 yesterday to 02:07 yesterday BBC Digital TV Off Air; DSO related from 12:54 yesterday to 13:27 yesterday [BBC]

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Transmitter engineering's 138,029 posts xx
Friday, 20 April 2012
Transmitter engineering
sentiment_very_satisfiedOwner

6:28 AM

DORKING transmitter - Freeview BBC Digital TV Off Air; DSO related from 00:23 on 18 Apr to 02:07 on 18 Apr BBC Digital TV Off Air; DSO related from 12:54 on 18 Apr to 13:27 on 18 Apr [BBC]

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Transmitter engineering's 138,029 posts xx
Monday, 28 May 2012
Tuesday, 29 May 2012
Wednesday, 30 May 2012
Transmitter engineering
sentiment_very_satisfiedOwner

6:27 AM

DORKING transmitter - Freeview HD Digital TV Off Air from 14:49 on 28 May [BBC]

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Transmitter engineering's 138,029 posts xx
Wednesday, 20 February 2013
M
Mike
9:58 AM

I live in Claygate Road, Dorking, just behind the Glory Woods, and having just moved into the house from about 1 mile away in North Holmwood I was surprised to find that the tv signal is far worse, despite being higher up on a hill (less channels are received and the signal quickly degrades to become unwatchable, pictures freeze etc and then disappear to be replaced by 'no signal' or 'signal cannot be decoded' messages). I am assuming that the hills and woods in the area may be responsible, despite the house being situated higher up than my old house. The aerial on the house appears to be the old style yagi type, and it is much lower down than neighbouring houses (they are on poles about 6-8 feet higher). Would I benefit from switching to a high gain aerial on a longer pole, and roughly how much might this cost? I don't particularly want to have to get cable or Sky, although the previous owneres had Sky, possibly because of the freeview signal issues, as I am content with the channels offered by Freeview, or would be if I could watch them!!.
Thanks

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Mike's 2 posts GB
Dave Lindsay
sentiment_very_satisfiedPlatinum

10:58 AM

Mike: Firstly, looking at the aerials on Claygate Road via Streetview, there are a number of transmitters being used. The first thing to do is ensure that the TV is tuned to the transmitter to which the aerial faces.

The Dorking relay transmitter is close by:

mb21 - The Transmission Gallery

It is within the trees and is visible from Streetview. It could be that your TV has tuned to it for PSB channels and it is this that you need to correct.

If you're on another transmitter, then I guess that it's likely to be Crystal Palace or Reigate. The tower blocks may be acting to block these transmitters for some of the houses on Claygate Road.

Crystal Palace and Reigate broadcast all Freeview channels, and Dorking only carries PSB channels. For a list of Freeview services (including which are PSB and which are COM) see:

DTG :: DTT Services by Multiplex

Dorking broadcasts on 44, 41 and 47(HD)
Crystal Palace's are 23, 26, 30(HD), 25, 22, 28
Reigate's are 60, 57, 53(HD), 21, 24, 27

These numbers are the UHF channel numbers of each multiplex (mux): PSB1, PSB2, PSB3(HD), COM4, COM5, COM6, respectively. Most receives give UHF/RF channel numbers, but some anti-quated ones only give frequencies in MHz, so you will have to convert. The frequencies are given by this website on each transmitter's page.

Whilst viewing one service from each mux, bring up the signal strength. So check BBC One, ITV, BBC One HD, ITV3, Pick TV and Film4 (these are the first services from each mux).

If you find that the PSBs from Dorking have been tuned in when they should be from Reigate or Crystal Palace, then unplugging the aerial during the middle part of the scan should hopefully do. I say "hopefully" because it might be that the signal from Dorking is that strong that it picks them up with no aerial, for that reason it's probably best to unplug the aerial lead where it goes into your TV/box rather than at the wall socket.

Crystal Palace's channels are in the bottom third of the band, so unplugging at 30% and leaving it out until the end of the scan will do. For Reigate, unplug at 30% and then plug in again at 58% so as to miss out Dorking, in the middle.

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Dave Lindsay's 5,724 posts GB
Dave Lindsay
sentiment_very_satisfiedPlatinum

11:19 AM

Mike: The bearings for the transmitters are:

Crystal Palace 36 degrees, aerial horizontal
Reigate 65 degrees, aerial vertical

There also appear to be a few horizontally-polarised aerials pointing to Heathfield which is at 123 degrees. The Streetview photos were taken before switchover, in March 2009. If I'm correct, number 22 and a few others may have found that PSB3, COM5 and COM6 are unavailable as they are co-channel with Dorking's.

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Dave Lindsay's 5,724 posts GB
M
Mike
1:52 PM

Thanks Dave, I'll have a look and see where my aerial is pointing and go from there. I'm pretty sure it's not pointing towards the dorking relay as that is opposite the front of my house and up the hill behind the trees. I think it's pointing out from the back of the house, sort of south east ish, so possibly it's looking over to the Heathfield array. Once I know where it's looking, I'll see if I can retune using your method above and see if that helps. I have noticed when retuning when I moved in that I ended up with about 5 channels for a couple of days, and then it picked up more; sometimes what I can actually see does vary, not sure why that is but I guess it could just be a poor signal area. Anyway, I'll let you know how I get on - no doubt I'll probably have more questions ;-)

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Mike's 2 posts GB
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