Full Freeview on the Oxford (Oxfordshire, England) transmitter
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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._______
Digital television services are broadcast on a multiplexes (or Mux) where many stations occupy a single broadcast frequency, as shown below.
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 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.
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?
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
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-80s | 1984-97 | 1997-98 | 1998-2011 | 2011-13 | 2013-18 | 2013-17 | 23 May 2018 | ||
| VHF | C/D E | C/D E | C/D E | C/D E | C/D E T | W T | W T | ||
| C2 | BBCtvwaves | ||||||||
| C29 | SDN | ||||||||
| C31 | com7 | com7 | |||||||
| C37 | com8 | com8 | |||||||
| C41 | BBCA | ||||||||
| C44 | D3+4 | ||||||||
| C46 | _local | ||||||||
| C47 | BBCB | ||||||||
| C49tv_off | C5waves | C5waves | |||||||
| C50tv_off | SDN | SDN | |||||||
| C51tv_off | LOX | LOX | |||||||
| C53tv_off | C4waves | C4waves | C4waves | +BBCA | +BBCA | +BBCA | |||
| C55tv_off | ArqB | ArqB | ArqB | com7tv_off | |||||
| C56tv_off | COM8tv_off | ||||||||
| C57tv_off | BBC1waves | BBC1waves | BBC1waves | BBCB | BBCB | BBCB | |||
| C59tv_off | -ArqA | -ArqA | -ArqA | ||||||
| C60tv_off | ITVwaves | ITVwaves | ITVwaves | -D3+4 | -D3+4 | -D3+4 | |||
| C62 | SDN | ||||||||
| C63 | BBC2waves | BBC2waves | BBC2waves |
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
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Wednesday, 5 October 2011
J
jb389:42 AM
Briantist: Yes, could I also say thanks for updating Oxfords TX power info, as just like Chris.SE I was also aware that you did have this fact mentioned in your "after switchover" notes, but I think that most people checking on power levels possibly didn't notice these qualifications thereby causing confusion.
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T
Teresa11:44 AM
@Steve- I work for a TV aerial company and since switchover we have found that there is a particular problem with Philips TV's (the ones that have a yellow bar when scanning). My boss has spoken to Philips technical dept. and they have admitted there is a problem. They were writing some new software asap to get over this problem. We had a customer call us back yesterday to say that he did a software upgrade then a re-tune and now it is working and storing the channels as before DSO. This might work for you?
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J
Jonathan2:19 PM
Yet another update: my aerial is almost certainly a Vision 48 element as shown at Vision 48 Element High Gain TV Aerial
When installed (replacing an old C/D I think) this greatly improved reception of the outlying multiplexes on C29, C34 and C68. I can see it would be somewhat over the top for current conditions.
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R
Richard 4:11 PM
Chris
I understand fully your first paragraph which appears to have been written from knowledge not hindsight. Why was the Mendip / Beckley clash never highlighted over the need for new equipment: prior to the temporary mast scenario, I was getting a decent digital picture on an analogue TV via a digital DVD recorder, but when MUX2 disappeared the only advice in these forums (yes I know it is community opinion only) was to get rid of the analogue TV and VCR though to be causing single frequency interference. Why oh why could someone just not say ITV will be bad for 2 years?
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J
jb384:20 PM
Jonathan: Just reading your postings, and I would particularly look forward to reading an update from your tests, especially if you can pick up ArqA / Mux Ch59, and at what level as this seems to be a problem channel by being on lower power(12.5Kw) sited right next to one on 100Kw.(D3&4)
Also, and as you obviously realise, your aerial system is pulling in far too strong a signal, as you are only 5 miles away from the transmitter.
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C
Chris.SE6:38 PM
Briantist: No problem, thanks for the update, I'm just surprised you manage to keep up with everything.
Jonathan; Thanks for the update, as jb38 I look forward to the results of the testing.
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M
Mike Dimmick6:58 PM
Richard: I'm not sure what Mendip clash you're talking about, Mux 2 at Oxford was adjacent to Mendip Mux D before switchover, and the two stations ran like that for ten years since March 2001. Both got subsequent power increases, Oxford in August 2002 and Mendip some time in mid-2003. From January this year, Mendip C67 had a power increase from 10 kW to 26 kW so ArqB could launch in final mode, restoring Sky Sports. This would presumably be the upper limit that could be used.
People out in Swindon might have had a problem on occasion with adjacent channel interference (caused by filtering being imperfect - in the real world, some leakage into adjacent channels is inevitable - and a little cost-saving on using less complex filters where there isn't an adjacent channel at the same site). Someone in or near Beckley itself would be unlikely to have this problem except in incredibly rare weather conditions.
I'm really not sure what your issue was - some local source of interference does seem the most likely. If you're having increased problems now - the same on all multiplexes - I'd look into sources of impulse interference like a thermostat or other motor.
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A
Andrew7:00 PM
Oxford
We live in a block of flats in central oxford and since the completion of the digital switchover on 28th September, we have lost COM5 and COM6 (as listed in the above channel list), or sometimes referred to C and D. These are the MUXs carrying the likes of Dave, PickTV, Film4 etc.
We received these MUXs before the switchover occurred, the signal was sometimes weak, but now there is nothing there at all, I've even tried a manual tune and it reports there is no signal. I've tried repeated factory resets and checked for interference from other equipment and that all the cables are ok, although I'm pretty sure this isn't the case as the channels just disappeared on the 28th. As we live in a flat with a central aerial source I can't check the aerial at the moment.
I've searched this site but couldn't find a reason why these would drop out in such a way, but if there is please point me to it as I'd love to get these channels back.
Thanks very much.
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Andrew's: mapA's Freeview map terrainA's terrain plot wavesA's frequency data A's Freeview Detailed Coverage
C
Chris.SE11:27 PM
Richard: To be clear, it's not specifically a Mendip / Beckley "clash" as such, any more than digital transmissions from them and other Main transmitter sites have to "co-exist" with analogue (& digital) main & relay transmitter sites elsewhere.
Whilst you refer to community opinion, it's a shame that other options were not suggested at that time, that said if you wanted to get the best from the digital that was available, you would probably have t0o have gone down most of the route you did, but without getting rid of the analogue at that time.
However, we are now in a different ball game. With the increase in Transmission power, a lot of people will be using equipment whose sensitivity was more appropriate for the weaker pre-DSO signals and with High-gain aerials and boosters this equipment will be grossly overloaded leading to apparent loss of reception.
In this situation, the first thing do do is remove any booster from circuit. This is much more involved if it is a 'mast-head' amp as you will need to get up to the aerial to remove it (rememmber to remove the power unit first). However, if this is not a job you are able to do yourself, I would try an attenuator at the set end first - if a mast-head amp itself is not overloaded, then attenuation at the set will solve the problem.
If it's a simple booster in the loft or at the set, just take it out of circuit and join the two halves with appropriate connectors if required.
In virtually all cases, there will be no need to fit a smaller/lower gain aerial, fitting attenuator(s) will achieve the same and is considerably cheaper than an aerial rigger and aerial!
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C
Chris.SE11:54 PM
Mike Dimmick: Richard's issue is that since DSO he now has so much signal he doesn't need his high gain aerial and booster (wasted money in his eyes) - the flylead hanging out the back of the set is providing sufficient signal although I suspect that it is picking up signal being radiated from the adjacent downlead or booster.
Whilst everyone who is suffering just the loss of one MUX should check for Single frequency interference because of the channel change that occurred, in most cases where people are close to the transmitter (as most of these recent posts are) it is gross overload, so it's removal of boosters and maybe additional attenuation that is required.
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