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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 26/09/2022 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-3100,000W
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, 250 BBC Red Button, plus 16 others

PSB2
D3+4
 H max
C44- (657.8MHz)295mDTG-3100,000W
Channel icons
3 ITV (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, 30 E4 +1, 35 ITV +1 (Central west),

PSB3
BBCB
 H max
C47 (682.0MHz)295mDTG-6100,000W
Channel icons
56 5SELECT, 101 BBC One HD (England no regional news), 102 BBC Two HD (England), 103 ITV HD (ITV Central West), 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

COM4
SDN
 H -3dB
C29 (538.0MHz)295mDTG-850,000W
Channel icons
12 Quest, 20 Drama, 21 5USA, 29 ITV2 +1, 32 5STAR, 33 5Action, 41 Legend, 42 GREAT! movies action, 46 Channel 5 +1, 58 ITVBe +1, 59 ITV3 +1, 64 Blaze, 67 CBS Reality, 74 Dave ja vu, 78 TCC, 81 Blaze +1, 89 ITV4 +1, 203 CITV, 208 POP MAX, 209 Ketchup TV, 210 Ketchup Too, 211 YAAAS!, plus 15 others

COM5
ArqA
 H -3dB
C37- (601.8MHz)319mDTG-850,000W
Channel icons
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, 57 Smithsonian Channel, 60 Drama +1, 70 Quest +1, 75 Yesterday +1, 83 Together TV, 233 Sky News, plus 8 others

COM6
ArqB
 H -3dB
C31 (554.0MHz)319mDTG-850,000W
Channel icons
 FreeSports, 25 W, 27 Yesterday, 34 GREAT! movies, 39 DMAX, 44 HGTV, 71 Quest Red +1, 73 HobbyMaker, 82 Talking Pictures TV, 84 PBS America, 88 Classic Hits, 235 Aljazeera English, plus 19 others

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

DTG-3 64QAM 8K 2/3 24.1Mb/s DVB-T MPEG2
DTG-6 256QAM 32KE 2/3 40.2Mb/s DVB-T2 MPEG4
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 (183°)
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
Saturday, 25 January 2014
R
Rob
sentiment_satisfiedBronze

6:10 PM
Kidlington

JB38,
Cheers again for the advice and i do have a tetra station near to me, However i am getting near the end of my tether with this one, I think i may just go and buy a new TV and put this on in the play room where hopefully it will not get effected.
However do not really want to spend the cash if i don't have to.
I thought that the 4G would also help with the Tetra, but i was obviously wrong there.However whatever i try seems to not work so i am now really getting annoyed.
If i get a tetra filter do i not need to fit it before the booster 4G splitter? or can i fit it in the back on the tv like the one i purchased for 4G over and above the one in the loft.

Thanks again
Rob

Rob


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Rob's 63 posts GB
J
jb38
sentiment_very_satisfiedPlatinum

7:55 PM

Rob : Filters used for Tetra or 4G transmissions should always be fitted between the aerial and any amplification that may be used simply because if they aren't then the amplifier would be boosting the frequencies you are trying to eliminate.

4G transmissions are at a fractionally higher frequency than C60 and not actually on it, whereas Tetra transmission base stations are only transmitting at approx half the frequency, but with the first harmonic of this transmission being the problem as it can be exactly on C60 dependant on which part of the 390 - 395Mhz band its operating on, 393Mhz being half.

I only mention that the filter could be tried directly into the aerial socket purely for test purposes in case something was being picked up in the cabling.

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jb38's 7,179 posts GB
R
Rob
sentiment_satisfiedBronze

8:20 PM
Kidlington

Jb38,
Would you recommend trying the tetra filter then between the Ariel and the booster, i am becoming a wiz at fitting Ariel cable fittings now anyway so might be worth a try.
If they are coming in from a good screen cable i have the type with the brade and the foil then the screening on the Sony TV and dvd must be shocking. Still strange this has only just started since just before Xmas still.
The 4G should have removed then at the booster in the loft as i have fitted it Ariel to booster to output of booster. The extra one i purchased for the back of the tv then is probably doing nothing.

Regards
Rob



link to this comment
Rob's 63 posts GB
J
jb38
sentiment_very_satisfiedPlatinum

9:20 PM

Rob : With regards to the second 4G filter that you purchased, I really do not think this would make any difference to your situation when you already have one fitted in the loft provided that its installed between the aerial and the booster, if not actually contained within said booster? as going by all the symptoms you have reported / tests carried out I very much doubt if your problem is connected with any possible 4G transmissions that may, or may not be taking place in the area, because if it was then the chances are that ArqA on mux C59 (11 Pick TV / 82 Sky news) would also be affected and maybe even the HD service on mux C57.

My line of thinking is along the possible direct injection interference referred to or issues connected with Tetra, especially when you have reported a possible source of this type interference being located nearby.

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jb38's 7,179 posts GB
R
rob
sentiment_satisfiedBronze

9:54 PM
Kidlington

Hi jb38, the 4g is in the booster, 8 way only using 2 outlets (future proofing). Think i will try the tetra filter and then i have covered all bases. If that does mot work then i think i will just buy a new tv or hope to keep hold of this borrowed set top box.
what do you think?

Rob

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rob's 25 posts GB
R
rob
sentiment_satisfiedBronze

9:57 PM
Kidlington

Jb38, what does tetra interference look like? Is it not meant to be constant, can it cause intermittent interference?

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rob's 25 posts GB
J
jb38
sentiment_very_satisfiedPlatinum

11:31 PM

rob: If the aspect of 4G interference is catered for within the booster / filter then you do not require another one to be fitted anywhere.

And with regards to your second question, Tetra interference can be of an intermittent nature dependant on its usage at a particular time due to the fact that its basically associated with emergency services, the demands on not being of a constant nature in the same way as applies in the case of domestic 4G.

That said, I do feel that your TV's location in relation to a possible source of interference from whatever is being used by your next door neighbour is possibly the main reason for your problem.

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P
pikpilot
sentiment_satisfiedBronze

11:46 PM

Rob, just found this site TETRA and television interference from the national research-based TETRA Airwave safety campaign which says that interference from Tetra is more likely to be on Channel 60 (analogue in this 2005 case).
How far are you from the Police Tetra transmitter?
If you are in north west Kidlington, is your aerial pointing at the police transmitter when pointing to Oxford TV transmitter? If so, pointing the aerial a few degrees off will help.

If not too far away then any mismatch in the coax caused by breaks or unterminated spitters/ coax etc could allow this intermittent signal in. It is a harmonic of the radiated Tetra transmission so you would have to be reasonably close.

If you put in a Tetra filter it MUST be on the input side of any distribution amplifier, if you use one. Putting on the output or at the tv will not work as the distribution amp is reasonably wide-band and likely to have already amplified the interfering signal.

Incidentally, 4G causes interference on CH 59 as shown here
Labgear F4GA Official at800 4G TV Filter | Maplin


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pikpilot's 23 posts GB
Sunday, 26 January 2014
J
jb38
sentiment_very_satisfiedPlatinum

12:08 AM

pikpilot: Yes indeed! but the filter referred to has a blocking effect on any channel over C60 as 790mhz as mentioned in the write up is halfway between C60 and C61.

I will also agree that Tetra interference had a far greater effect on the reception of analogue transmissions over that of DTT, but dependant on how close the transmission source is to a receiving aerial the form of interference it does create (picture break up) is usually of an intermittent nature.

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R
Rob
sentiment_satisfiedBronze

9:14 AM
Kidlington

Hi JB38 / Pickpilot
I am probably within 1/4 of a mile of the tetra station i think and i think it is new, emailed airwave the people who run them and they have emailed back saying that they are looking into it. Just purchased a tetra filter off ebay, says it will be here for Tuesday or before so will try that. The police station is near by and the Thames Valley police HQ has a massive tower which my Ariel pretty much points straight at, being this close to it, it is difficult to avoid.



If this does not cure it i think i will have to buy another TV, really dont get how its only affecting the Sony Bravia and Sony hdd / dvd player and seemingly only in one position. Scared however i will buy a TV it have the same issue and i can then not return it.

Again Thanks for all the help.


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