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Freeview Light on the Carhampton (Somerset, England) transmitter

first published this on - UK Free TV
sa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps51.174,-3.409 or 51°10'27"N 3°24'32"Wsa_postcodeTA24 6UZ

 

The symbol shows the location of the Carhampton (Somerset, England) transmitter which serves 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 Carhampton (Somerset, England) transmitter.

Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
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Which Freeview channels does the Carhampton 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
 V max
C24 (498.0MHz)85mDTG-320W
Channel icons
1 BBC One (SD) West, 2 BBC Two England, 9 BBC Four, 201 CBBC SD, 202 CBeebies, 231 BBC News, 232 BBC Parliament, 250 BBC Red Button, plus 16 others

PSB2
D3+4
 V max
C27 (522.0MHz)85mDTG-320W
Channel icons
3 ITV (SD) (West), 4 Channel 4 (SD) South ads, 5 Channel 5 (SD), 6 ITV 2, 10 ITV3, 13 E4, 14 Film4, 15 Channel 4 +1 South ads, 18 More4, 24 ITV4, 33 ITV +1 (West), 45 Film4 +1,

PSB3
BBCB
 V max
C21+ (474.2MHz)85mDTG-620W
Channel icons
86 More4 +1, 101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV HD (ITV Meridian Southampton), 104 Channel 4 HD South ads, 105 Channel 5 HD, 204 CBBC HD,

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 60 Freeview channels?

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

The Carhampton (Somerset, England) mast is a public service broadcasting (PSB) transmitter, it does not provide these commercial (COM) channels: 4Music, 4seven, 4seven HD, 5SELECT, 5Spike, 5STAR, 5STAR +1, 5USA, 5USA +1, AlJazeera English (SD), Aljazeera English HD, BBC Four HD, BBC News HD, Blaze, Blaze +1, CBeebies HD, CBS Drama, CBS Justice, CBS Reality, CBS Reality +1, Challenge, Channel 4+1 HD, Channel 5 +1, CITV, Dave, Dave ja vu, DMAX, Drama, E4 +1, Food Network, Forces TV, Freesports, Home, Horror Channel, ITV2 +1, ITV3 +1, ITV4 +1, ITVBe +1, Together TV +1, Movies4Men, NOW 80s, Now 90s, Paramount Network, PBS America, pick, Pick +1, Quest +1, Quest Red, Quest Red +1, Really, RT HD, Sewing Quarter, Sky News, Smithsonian Channel HD, Sony Movie Channel, Talking Pictures TV, TCC, Together TV, Yesterday, YourTV.

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 Carhampton transmitter?

regional news image
BBC Points West 0.9m homes 3.4%
from Bristol BS8 2LR, 64km east-northeast (61°)
to BBC West region - 60 masts.
regional news image
ITV West Country News (East) 0.9m homes 3.4%
from Bristol BS4 3HG, 66km east-northeast (64°)
to ITV West region - 61 masts.
All of lunch, weekend and 50% evening news is shared with West Country (West)

How will the Carhampton (Somerset, England) transmission frequencies change over time?

1984-971997-981998-20102010-132013-182013-175 Jun 2019
A K TA K TA K TA K TA K TA K TA K T
C21BBC1wavesBBC1wavesBBC1waves+BBCB+BBCB+BBCBBBCB
C24ITVwavesITVwavesITVwavesBBCABBCABBCABBCA
C27BBC2wavesBBC2wavesBBC2wavesD3+4D3+4D3+4D3+4
C31C4wavesC4wavesC4waves

tv_off Being removed from Freeview (for 5G use) by 30 June 2020 - 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 24 Mar 10 and 7 Apr 10.

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

BBCA, D3+4, BBCB 20W
Analogue 1-4(-4dB) 8W

Which companies have run the Channel 3 services in the Mendip transmitter area

Jan 1958-Jul 1968Television Wales and the West
Jul 1968-Feb 2004Harlech 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. Carhampton 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
Friday, 2 August 2019
S
Steve Hill
5:40 PM

Lee Maidens: Whereabouts are you in Carhampton Lee?

link to this comment
Steve Hill's 10 posts GB
Saturday, 3 August 2019
C
Chris.SE
sentiment_satisfiedGold

12:01 AM

Steve Hill:

We were reminded (by Michael) that reception of Carmel on the North Devon coast is significantly affected by the height of the tide in the Bristol channel. No doubt it will affect Kilvey Hill as well which, although low power, can easily be strong enough to cause interference problems.

Whether log periodic aerials pointing in a suitable direction might give the best chance of rejecting Kilvey Hill as they have no side lobes and better front to back ratio compared to a yagi.

link to this comment
Chris.SE's 468 posts GB
N
Norman D. Landing
5:12 AM

This is an intruiging problem. Carhamptons transmit antenna system is a simple cardioid colinear array (pics on mb21) so a fault with the transmit antenna, while likely to cause a pattern change, would result in a noticable change in signal strength but not quality. The only things that can cause a quality loss to this extent on all three muxes are local interference, adjacent channel interference (these days often 4G) or as Chris SE has discovered - a strong co-channel interference source. Looking at the postcodes and the bearings from them to the relay, and to Kilvey Hill, it does look like that is the case here!

It looks like a somewhat imperfect level of spectrum planning! Plus, remarkably bad luck in that all three channels are co-channel with Kilvey Hill!

I suspect, as mentioned, the way to alleviate this is with some clever use of receive antenna pattern, bearing, and use of available shielding (positioning on side walls etc to try and block Kilvey)

one thing to note though - Kilvey is only part way through the 700MHz clearance process, at some point in the future that process will be completed. Ive no idea whether that will be a further frequency change or not


link to this comment
Norman D. Landing's 1 post GB
Sunday, 4 August 2019
S
Steve Hill
9:58 AM

Chris.SE: That's something worth trying, off on holiday for a few weeks so will get cracking when I get back and report back then.

link to this comment
Steve Hill's 10 posts GB
C
Chris.SE
sentiment_satisfiedGold

10:38 PM

Norman D. Landing:

Based on the currently published information there are no further planned changes at Kilvey Hill or Carhampton come to that. And there doesn't seem to be any predicted reception changes either, which I wouldn't expect now that changes in the West, SouthWest & South Wales have been completed. It's only if there's a lift on might one expect additional reception issues. Thanks for reminding us about using available shielding from things like sidewalls, a trick I've employed, a while in the past.

Steve Hill:

Well I hope you enjoy your break. When you've had a go & hopefully solved some of your customer problems it's probably worth getting everyone you know that's had/having issues to complain to the Freeview Advice line making the specific point that things went awry when Kilvey made its final change on July 17th.
Based on passed experience, it needs multiple complaints for anything to get logged properly, one person complaining even on others behalf has zilch effect. Without multiple complaints Arquiva/OFCOM certainly won't be likely to consider any sensible resolution to the problem. (The easiest being change Carhamptons channels IMHO).

I wouldn't get them to complain before you've done all you can as it's possible The Freeview Advice line might arrange for one of their listed aerial installers to visit people and resolve any aerial issues. Other than that, one other possible solution, especially for those with TV set with a built in satellite tuner is to go for Freesat.
If people have an adequate Broadband connection another rather inelegant solution would be to stream the main channels.

link to this comment
Chris.SE's 468 posts GB
C
Chris.SE
sentiment_satisfiedGold

10:42 PM

PS. I did mean Arqiva/OFCOM rather than the incorrect spelling - must be the time of day!

link to this comment
Chris.SE's 468 posts GB
Monday, 5 August 2019
S
Steve Hill
7:02 AM

Chris.SE: Thanks, I will report back in September with any solutions. I had considered Freesat for my customers but that involves quite an outlay for most of them, as it is, I've left them on a very good Carmel signal until I can get back to them.

link to this comment
Steve Hill's 10 posts GB
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