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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.

This transmitter has no current reported problems

The BBC and Digital UK report there are no faults or engineering work on the Oxford (Oxfordshire, 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 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 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, 30 E4 +1, 35 ITV1 +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 1 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
Friday, 24 January 2014
J
jb38
sentiment_very_satisfiedPlatinum

12:12 AM

rob: Although pikpilot has described a way of testing your cable runs using the minimum of technical measuring equipment ,i.e: an ohmmeter, if you do not possess such a device then I would suggest that you go into your Sony's tuning menu and select "manual tune" followed by entering C60 into the box but NOT being followed by pressing search or scan, because if any signal is being received on C60 then no matter how low it might be it should still be indicated on the strength / quality bars, the TV being allowed to remain on this mode whilst you move cables around and walk across the floor above the area where the cable is located whilst observing for any slight changes that might take place in the S & Q indications, because should any be seen then this would suggest a faulty connection somewhere in the coax run.

The point about this type of test being, that by entering a channel number into the manual tuning box but without pressing scan effectively makes the tuner act like a signal meter devoid of cut off threshold levels, this then enabling very low levels of signals to be viewed which would otherwise have been bypassed if search was pressed.

By the way, some Sony devices might not allow you to carry out the aforementioned test, and so you should initially try the test out using Oxfords BBC on mux channel 53 just to verify if it works. (also try C59)

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jb38's 7,179 posts GB
R
rob
sentiment_satisfiedBronze

6:36 AM
Kidlington

Thanks again jb 38, i am sure that it does not do that on my Sony bravia, if i do the manual tune it just asks for the number, i put it but there is no quality or strength on the manual tune or the auto. I can only see the meter after when i go into the info section and i only get strength there no quality. I will try again later.

Rob

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rob's 25 posts GB
R
rob
sentiment_satisfiedBronze

5:06 PM
Kidlington

Dear all,
update is i think that one of my issues is a weak signal due to the number of splitters in my system. I have put the fly lead that i made back on from the tv point to my dvd recorder, now last time i did a scan with this with the first set up ( no fly lead and cable split under the floor to two points) i got 9 channels ( Sony tv signal said high however and all channels found).
scanned with flylead to dvd player now have all the channels and i can check the signal and quality on the Sony dvd recorder unlike the Sony tv where i can only see the signal strength. Strength is now between 68 and 89 and the quality is 100. So there must be an issue with the cable or the number of splitters. However the blocky picture on channel 60 programmes is still present, not as bad but still there so i have put the alba set top box back on which does not.
I think that my Sony equipment must be more sensitive to some form of interference than the alba, hopefully when the 4g splitter comes it may cure the issue and boost the signal enough to use the under floor cables.

regards
Rob

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rob's 25 posts GB
MikeP
sentiment_very_satisfiedPlatinum

9:17 PM

Rob
Are your splitters of the passive type (do not require any power) or of the active type needing a power supply?

Reason I ask is that passive splitters rely upon having all the outputs connected all the time to maintain correct impedance matching throughout the system. If you unplug just one output from a passive splitter it will seriously disturb the signal distribution to the extent that the signal delivered to a connected input will be seriously reduced perhaps by as must as making a quarter or less of what it should be! (The mathematics is complex, but it is essential that correct impedance matching is maintained throughout the system, so every input is matched to its supply at 75 ohms.)

An active (powered) splitter, on the other hand, has buffer amplifiers built in so each output is 'independent' of all the others so impedance matching is always maintained no matter how many outputs are connected.

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MikeP's 3,056 posts GB
MikeP
sentiment_very_satisfiedPlatinum

9:19 PM

Rob
Forgot to add that a signal strength of 100% is not good! You can have too much of a good thing and 100% is too much. Typically you look for around 70-80% maximum.

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MikeP's 3,056 posts GB
R
rob
sentiment_satisfiedBronze

10:53 PM
Kidlington

Powered splitter on the way, have passive splitters one splitter has 4 output i only use 2. And then split again downstairs only a two way.

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rob's 25 posts GB
Saturday, 25 January 2014
R
rob
sentiment_satisfiedBronze

1:31 PM
Kidlington

Update, power splitter 4G ready now in loft with extension lead running up there for testing. Thought it had cured it then started blipping again. The signal strength is much improved however with the split under the flooring i still have in place. Run the fly lead above ground straight to the Sony bravia tv and that still did not stop the glitching. So tried the Sony dvd hhd on the fly lead above ground and again after a bit it has started to glitch also, also done with under floor cable and also glitching again. It is as if both Sony and hhd are ok until they have been on for 5 mins then it starts again.
Alba set top box is fine with no glitches well maybe one in 2 days for a second. So confused over this, i have the filter in place signal good quality good only glitching on channel 60, alba box works fine grrrrrrrrrrr, will use that for now but have to give back as borrowed, so lets hope the replacement i buy has the same shielding. Now think it must be next door, but they cannot change there setup apparently.
any other ideas or advice would be appreciated.

regards
Rob

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rob's 25 posts GB
J
jb38
sentiment_very_satisfiedPlatinum

4:40 PM

rob: Everything you have reported is inclined to suggest that the interference is possibly being picked up via direct injection into the TV's circuitry and with this being the reason why that nothing you have done seems to have made any difference to the situation with the exception of the test you had previously carried out of moving the TV away from its present location, because as mentioned in a previous reply some TV's are far more susceptible to picking up this form of interference more than others.

As things are, although being fully aware of the difficulties involved in moving larger TV's where stairs are concerned, but it would be interesting to know the result of the test if the TV was connected into your daughters aerial point, that is provided its not positioned directly above its present location in the living room?



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Rob
sentiment_satisfiedBronze

4:55 PM
Kidlington

Hi jb38, have brought another 4G filter to go directly in the back of the TV, so with the one in the booster in the loft and the one in the back of the tv maybe it will help, however the kids are playing sky landers now so i cannot check if it has.
If it has made no difference i will take it back to Maplin and try your idea of taking the TV upstairs to my daughters room and checking it on that Ariel.
Just don't understand why this is not effecting the borrowed set top box, i even placed it behind the tv on the same level as the TV but it still did not blip once.

Thanks again all for all the help, this is like having a steering wheel down my trousers.........it's driving me nuts!!!

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Rob's 63 posts GB
J
jb38
sentiment_very_satisfiedPlatinum

5:26 PM

Rob : I am not really saying that your problem is definitely being caused by directly injected interference as its only a minority of devices that are, but the possibility of it actually being this reason is somewhat backed up by you having found that nothing else is seemingly affected except the TV.

Another point being, that although I did not mention this at the time but you might have been better purchasing the combined Tetra / 4G filter as mentioned in a much earlier reply (Sunday19th @ 12.33am) because the possibility always exists that the former might be playing a role in your problem, as interference from this source is not the same as from 4G whose effect is generally one of swamping the tuner resulting in a weaker signal level. The other point about the combined filter mentioned being that it could have been inserted into various points in the cable run including directly into the TV's aerial socket.




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