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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 20/09/2021 Possible 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, 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, 25 ITV4, 29 E4 +1, 34 ITV +1 (Central west),

PSB3
BBCB
 H max
C47 (682.0MHz)295mDTG-6100,000W
Channel icons
72 Shopping Quarter , 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, 204 CBBC HD, plus 1 others

COM4
SDN
 H -3dB
C29 (538.0MHz)295mDTG-850,000W
Channel icons
 CCXTV, 12 Quest, 20 Drama, 21 5USA, 28 ITV2 +1, 31 5STAR, 32 Paramount Network, 41 GREAT! movies action, 45 Channel 5 +1, 55 5SELECT, 57 ITVBe +1, 58 ITV3 +1, 59 ITV4 +1, 63 Blaze, 66 CBS Reality, 68 Horror Channel, 73 Drama +1, 77 TCC, 80 Blaze +1, 203 CITV, 211 Ketchup TV, 212 YAAAS!, plus 15 others

COM5
ArqA
 H -3dB
C37- (601.8MHz)319mDTG-850,000W
Channel icons
11 Sky Arts, 17 Really, 19 Dave, 30 4Music, 35 pick, 39 Quest Red, 42 Food Network, 46 Film4 +1, 47 Challenge, 48 4seven, 56 Smithsonian Channel, 69 Quest +1, 74 Yesterday +1, 82 Together TV, 233 Sky News, plus 9 others

COM6
ArqB
 H -3dB
C31 (554.0MHz)319mDTG-850,000W
Channel icons
23 Dave ja vu, 26 Yesterday, 33 GREAT! movies, 38 DMAX, 40 CBS Justice, 43 HGTV, 67 CBS Drama, 81 Talking Pictures TV, 84 PBS America, 234 RT, 235 Aljazeera English, plus 18 others

LOX
 H -10dB
C51 (714.0MHz)295mDTG-1210,000W
Channel icons
from 22nd December 2014: 7 Thats Oxford,

com7
 H -7.9dB
C55 (746.0MHz)295mDTG-616,400W
Channel icons
 Together TV +1,  Merit, 64 FreeSports, 70 Quest Red +1, 76 Now 70s, 86 More4 +1, 87 PBS America +1, 89 Court TV, 96 Forces TV, 106 BBC Four HD, 107 BBC News HD, 113 RT HD, 114 Quest HD, 205 CBeebies HD, plus 2 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
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 - 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
Sunday, 9 February 2014
J
jb38
sentiment_very_satisfiedPlatinum

8:37 AM

rob: Well, I suppose that this is a positive indication that the problem "is" definitely caused by your neighbours equipment, although if the interference hadn't stopped when your neighbours killed the power to those devices then this would have created a really mind baffling problem, because as far as I am concerned all of the tests you carried out were meaningful including the RFI detection sweep of the wall using the portable radio.

However, the next stage is to single out which one of the two devices referred to is responsible for the problem albeit that the Virgin box is the main suspect, singling them out simply done by powering them up one at a time.

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jb38's 7,179 posts GB
R
rob
sentiment_satisfiedBronze

11:44 AM
Kidlington

Hi All,
Another update, next door have left the Tivo TV box on this morning and switched off the Wi Fi and i have had no interference again, so it would seem that the culprit is the Wi Fi box or maybe there TV (but this is normally off so would not expect that).
Next door still have there interference on there Tivo box too and i have suggested that they turn off the Wi Fi box and see if there issue also go's away.
Next door have contacted virgin media again (before this latest test) and they are sending out a "Principal Technician" to look at there issue and mine.
Just glad the neighbors are understanding about it.

Cheers again for all the advice, i will keep you up to date.

Rob



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rob's 63 posts GB
J
jb38
sentiment_very_satisfiedPlatinum

12:23 PM

rob: I had also intended adding to my previous reply that out of the two devices mentioned the Wi-Fi box is is only one of the two that is designed to emit a radio signal, whereas anything radiating from the Virgin box would be unintentional in the form of interference, however the problem should now be easily solved should your neighbour be willing to purchased another brand of Wi-Fi device, my reason for stating another brand is just in case whatever they are using has a reputation for being responsible for this type of problem.

Maybe you could enquire as to the brand / model of device they are using?

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

3:20 PM

Hi jb38,
The Wi fi box is a virginmedia superhub, the same as the one in my house. Mines a long way from my tv.
i am hoping that Virgin Media can now sort this out.

regards
Rob

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

4:39 PM

In that case, as your own VM hub is installed a good distance away from the TV then it wont really be known whether or not its also capable of causing similar problems to that experienced from your next door neighbours, as it might well do!, but though it would be interesting to know the result of an interference level comparison test between your neighbours hub and your own by using the same portable radio as before when positioned at a fixed distance from the hub, e.g: from exactly 3 or 4 feet above it, noting the result and then repeating the procedure on your neighbours hub.

The main aspect about this type of test being accuracy, that is ensuring that the radio is positioned in exactly the same spot in both locations and that no alterations are made to the tuning or volume settings on the radio between the two households.

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jb38's 7,179 posts GB
R
rob
sentiment_satisfiedBronze

8:29 PM
Kidlington

Hi jb38,
Well i don't really have the opportunity to do the suggested test, however i have put the AM Radio near to my Wi Fi router and there is some noise coming from it as you would expect but not loads, however the power supply adapter was very noisy, if they have this against the wall next door which i think they may have it could be the issue.
Anyway i an hoping that Virgin Media will now take this seriously and investigate the issue correctly.

Will keep you posted

Rob

link to this comment
rob's 63 posts GB
Monday, 10 February 2014
J
jb38
sentiment_very_satisfiedPlatinum

12:22 AM

rob: Yes, most modern light weight power adaptors are what's known as SMPS devices, short for "switched mode power supplies" and which in practical terms are high frequency power converters, most of being prone to emitting high levels of RFI across a wide band of frequencies albeit only over very short distances of around a maximum of 3 feet or so.

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jb38's 7,179 posts GB
Saturday, 15 February 2014
P
Pikpilot
sentiment_satisfiedBronze

6:26 PM
Swindon

Rob, I used to travel to the Far East to do technical appraisals on SMPS and their manufactures. There is a lot of product that claim to meet the standards for conducted and radiated noise - and even have the right markings - but in fact do not.

Often the SMPS has the space on the pc board for the conducted EMI filters but the components are just not fitted (cost saving?).

Even big name buyers of SMPS get caught out unless they use a well respected assurance company to vet each batch before shipment. VM may be very glad that you have identified a faulty batch or a poor supplier.
I have one here that meets the standards but still causes interference on an FM radio when plugged into a socket which is on a spur from the one powering the SMPS.

Similar problems are arising now from the so called Power Line Adaptors which use mains wiring to give internet access to a pc that is remote from the router.

Glad you are finally getting somewhere.



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Pikpilot's 23 posts GB
Monday, 24 February 2014
Transmitter engineering
sentiment_very_satisfiedOwner

10:23 AM

OXFORD transmitter - Over the next week Oxford main transmitter: TV (digital) Liable to interruption, Radio (analogue) working normally, Radio (digital) working normally. [DUK]

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Transmitter engineering's 136,303 posts xx
R
rob
sentiment_satisfiedBronze

3:01 PM
Kidlington

Well, it's been some time but here is an update. After many visits to my Neighbours house virginmedia stating that nothing was wrong with the kit i complained myself directly to Virginmedia.
They contacted me directly and made an appointment with next door and they were hoping to move the wi fi box to another room in the house, I had explained the issue in depth in the complaint made and they did not question the prognosis.
However they have now visited next door and they do not want to move there wi fi box (no understanding why really unless it plugs into the tivo box, i have no idea). He has changed the router for one on another channel and i will have a look tonight, however i am sure the issue will still be there if the box has not been moved.
Will keep you up to date.

Regards
Rob

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rob's 63 posts EU
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