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Full Freeview on the Oxford (Oxfordshire, England) transmitter

first published this on - UK Free TV
sa_streetviewGoogle Streetviewsa_gmapsGoogle mapsa_bingBing mapsa_gearthGoogle Earthsa_gps51.790,-1.179 or 51°47'25"N 1°10'46"Wsa_postcodeOX3 9SS

 

The symbol shows the location of the Oxford (Oxfordshire, England) transmitter which serves 410,000 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 Oxford (Oxfordshire, England) mast?

Oxford transmitter - Oxford transmitter: Possible effect on TV reception week commencing 25/03/2024 Pixelation or flickering on some or all channels Digital tick


Choose from three options: ■ List by multiplex ■ List by channel number ■ List by channel name
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Which Freeview channels does the Oxford 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
C41+ (634.2MHz)295mDTG-100,000W
Channel icons
1 BBC One (SD) South (Oxford), 2 BBC Two England, 9 BBC Four, 23 BBC Three, 201 CBBC, 202 CBeebies, 231 BBC News, 232 BBC Parliament, plus 17 others

PSB2
D3+4
 H max
C44- (657.8MHz)295mDTG-100,000W
Channel icons
3 ITV 1 (SD) (Meridian/Central (Thames Valley 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 (Central west),

PSB3
BBCB
 H max
C47 (682.0MHz)295mDTG-100,000W
Channel icons
46 5SELECT, 101 BBC One HD South (Oxford), 102 BBC Two HD England, 103 ITV 1 HD (ITV Central West), 104 Channel 4 HD South ads, 105 Channel 5 HD, 106 BBC Four HD, 107 BBC Three HD, 204 CBBC HD, 205 CBeebies HD, plus 1 others

COM4
SDN
 H -3dB
C29 (538.0MHz)295mDTG-850,000W
Channel icons
20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 38 Channel 5 +1, 41 Legend, 42 GREAT! action, 57 Dave ja vu, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 TRUE CRIME, 68 TRUE CRIME XTRA, 78 TCC, 81 Blaze +1, 83 Together TV, 89 ITV4 +1, 91 WildEarth, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, 267 Al Jazeera English, plus 30 others

COM5
ArqA
 H -3dB
C37- (601.8MHz)319mDTG-850,000W
Channel icons
11 Sky Mix, 17 Really, 19 Dave, 31 E4 Extra, 36 Sky Arts, 40 Quest Red, 43 Food Network, 47 Film4 +1, 48 Challenge, 49 4seven, 60 Drama +1, 65 That's TV 2, 70 Quest +1, 74 Yesterday +1, 75 That's 90s, 233 Sky News, plus 11 others

COM6
ArqB
 H -3dB
C31 (554.0MHz)319mDTG-850,000W
Channel icons
12 Quest, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 52 GREAT! romance, 56 That's TV (UK), 61 GREAT! movies extra, 63 GREAT! romance mix, 71 That’s 60s, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 235 Al Jazeera Eng, plus 18 others

LOX
 H -10dB
C46 (674.0MHz)295mDTG-1210,000W
Channel icons
from 22nd December 2014: 7 That's Oxford,

DTG-8 64QAM 8K 3/4 27.1Mb/s DVB-T MPEG2
DTG-12 QSPK 8K 3/4 8.0Mb/s DVB-T MPEG2
H/V: aerial position (horizontal or vertical)

Which BBC and ITV regional news can I watch from the Oxford transmitter?

regional news image
BBC South (Oxford) Today 0.4m homes 1.6%
from Oxford OX2 7DW, 6km west-southwest (258°)
to BBC South (Oxford) region - 6 masts.
BBC South (Oxford) Today shares 50% content with Southampton service
regional news image
ITV Meridian News 0.9m homes 3.4%
from Whiteley PO15 7AD, 102km south (182°)
to ITV Meridian/Central (Thames Valley) region - 15 masts.
Thames Valley opt-out from Meridian (South). All of lunch, weekend and 50% evening news is shared with all of Meridian+Oxford

How will the Oxford (Oxfordshire, England) transmission frequencies change over time?

1950s-80s1984-971997-981998-20112011-132013-182013-1723 May 2018
VHFC/D EC/D EC/D EC/D EC/D E TW TW T
C2BBCtvwaves
C29SDN
C31com7com7
C37com8com8
C41BBCA
C44D3+4
C46_local
C47BBCB
C49tv_offC5wavesC5waves
C50tv_off SDNSDN
C51tv_offLOXLOX
C53tv_offC4wavesC4wavesC4waves+BBCA+BBCA+BBCA
C55tv_offArqBArqBArqBcom7tv_off
C56tv_offCOM8tv_off
C57tv_offBBC1wavesBBC1wavesBBC1wavesBBCBBBCBBBCB
C59tv_off-ArqA-ArqA-ArqA
C60tv_offITVwavesITVwavesITVwaves-D3+4-D3+4-D3+4
C62SDN
C63BBC2wavesBBC2wavesBBC2waves

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 14 Sep 11 and 28 Sep 11.

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

Analogue 1-4 500kW
BBCA, D3+4, BBCB(-7dB) 100kW
SDN, ARQA, ARQB(-10dB) 50kW
Analogue 5(-11dB) 40kW
com8(-14.7dB) 17.1kW
com7(-14.8dB) 16.4kW
Mux 1*, Mux 2*, LOX(-17dB) 10kW
Mux C*, Mux D*(-18dB) 8kW
Mux A*, Mux B*(-19.2dB) 6kW

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

Feb 1956-Jul 1968Associated TeleVision†
Feb 1956-Jul 1968Associated British Corporation◊
Jul 1968-Dec 1981Associated TeleVision
Jan 1982-Dec 2006Central Independent Television
Dec 2006-Feb 2009ITV Thames Valley
Feb 2009-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. Oxford 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, 31 January 2014
R
Rob
sentiment_satisfiedBronze

11:14 AM
Kidlington

Have borrowed an AM/FM radio so will try and identify the entry point on the wall today.

Thanks again for your help

Rob

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Rob's 63 posts EU flag
Rob's: mapR's Freeview map terrainR's terrain plot wavesR's frequency data R's Freeview Detailed Coverage
R
Rob
sentiment_satisfiedBronze

3:48 PM

Hi all again,
well i borrowed the am fm radio tuned it to between stations on am turned off my tv and stuff and approached the wall. Well i got within 10 inches and the interference started, as i got closer Jesus its like really noisy, very noisy behind the tv and noisy lower too pretty much the whole section of the wall from floor to around a foot higher than my tv is alive with noise.
Well i hope the virgin engineer comes out soon to sort this out, will have to remind them next week if i don't here anything.

regards
Rob

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Rob's 63 posts GB flag
J
jb38
sentiment_very_satisfiedPlatinum

8:39 PM

Rob: I rather suspected that this might be the case! I will say though that most plastic cased digital equipment emits a certain level of noise that can be detected on an AM radio, although with this generally not at a high level after having passed though a properties double thick brick dividing wall, the noise referred to usually being of a purring / ripple nature especially from LCD TV's, the effect of being particularly noticeable at certain spots on an AM receivers MW band.

As far as the engineers visit to your neighbour is concerned, it would of course be advantageous to your case if you managed to be around when the engineer called at your neighbours house for the purpose of being able to give a demonstration of the problem.

The problem might even be caused by an iffy connection in the Virgin cable termination box, but with problems of this nature it could be anywhere in the system including the Virgin box itself.

link to this comment
jb38's 7,179 posts GB flag
R
Rob
sentiment_satisfiedBronze

8:51 PM

Hi jb38,
i have asked him to let me know when they are coming so hopefully i can have a chat with them. The noise was not so much a purr but a bloody great roar, really aggressive noise.

will drop him a note to remind him i think if i don't hear anything early next week.

Rob

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Rob's 63 posts GB flag
MikeP
sentiment_very_satisfiedPlatinum

9:22 PM

Mazbar
With around 50 years experience in the TV servicing and manufacturing industries, I have a pretty good knowledge of installing and servicing TV and radio aerials, and satellite dishes, as well as servicing the receivers as well.
The tests carried out by Rob at the request of several contributors here have shown that the aerial installation does *not* have a problem.

If you look at Rob's reply, just above the latest from jb38 above, you will see the test shows very significant RF interference of the EMI type in the vicinity of where he normally has his TV set.
So it confirms our suspicions that the Sony TV is not at fault, though it may be more sensitive to EMI than it should be, but it appears to be some equipment (perhaps that supplied by Virgin to the neighbour) that is emitting EMI - which it should not do. There are rules about EMI radiations and susceptibility and I think this needs to be investigated by those equipped to conduct such investigations.

Rob
It might be worthwhile to look at the Ofcom website, namely Ofcom | TV or radio interference or reception problems and contacting them to investigate your problem further. (SN119HW)

link to this comment
MikeP's 3,056 posts GB flag
R
Rob
sentiment_satisfiedBronze

9:43 PM

Hi mike P
Cheers i think i will contact them if i don't get any joy with virgin media. The noise does seem extreme.

cheers Rob

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Rob's 63 posts GB flag
M
MikeB
sentiment_very_satisfiedPlatinum

10:57 PM

Rob: Could be dodgy wiring on their side?

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MikeB's 2,579 posts GB flag
Saturday, 1 February 2014
M
mazbar
sentiment_satisfiedGold

6:30 AM

MikeP: you say his installation does *not* have a problem but reading mist of his post he has a splitter under the floor this can let in interfereance he says he has re made fly leads well after over 20 years of seeing how people try to make there own fly leads this doesn't say there isn't still a problem. In your 50 years experance can you tell me how many times equipment from another house has caused interfereance in another property. The quickest way of testing that no one has said would be to switch off and unplug next doors virgin box and wifi router if the interfereance is still there then it isn't next door and it is in robs house.

link to this comment
mazbar's 384 posts GB flag
J
jb38
sentiment_very_satisfiedPlatinum

7:50 AM

mazbar: Although I would prefer NOT to be involved in any who said what debate, but on the subject of no-one having suggested switching off the suspect device, I had actually referred (28th @ 11.49pm) to the neighbour switching "everything" off as the only way of determining if his equipment was responsible or not for the problem.

And on the subject of the under floor cabling, I realise that its a bit time consuming to backtrack through all the postings made on this subject, but Rob had said on 25th @1.31pm that the fault was still evident even when the under floor section had been bypassed by using a fly lead from the wall socket straight into the TV.

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jb38's 7,179 posts GB flag
M
mazbar
sentiment_satisfiedGold

12:22 PM

jb38: did rob get the neighbor to switch everything off and did this rectify his problem. If it did then it is the neighbor. If the face plate was connected to was connected to the splitter the interfereance can go each way. The other thing it could be is the ring main faulty to this one point that can cause interfereance . Can I ask have you ever been to a customer where the interfereance was coming from something next door other than a radio ham ?

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mazbar's 384 posts GB flag
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