Full Freeview on the Oxford (Oxfordshire, England) transmitter
 | Google Streetview |  | Google map |  | Bing map |  | Google Earth |  | 51.790,-1.179 or 51°47'25"N 1°10'46"W |  | OX3 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 04/11/2024 Pixelation or flickering on some or all channels 
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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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Saturday, 9 November 2013
M
Michael7:00 PM
Jeff Boyle: Last time I checked, the TV Licence goes towards the BBC channels and since you still have those, your comment about the licence is a bit pointless!
But if you actually want to solve your problem, get in touch with at800 as Dave says - they will tell you definitely whether 4G is the problem. If not, Freeview reception, unless it is external interference, is your responsibility.
Go to Contact at800 / DMSL | General Enquiries | at800 and phone them tomorrow.
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J
Jeff Boyle9:34 PM
Dave Lindsay:
Hi Dave,
I shall indeed be contacting this at800 company. I installed a proper digital tri fold aerial in my loft. I connected it to an 8 tv booster
amp both from Maplins. I did all this over a year ago and I never had a problem with freeview reception. The only problem I have is now and since nothing has changed at my end. Then the problem is at the transmitter end and or the 4G frequency system. The evidence and data speaks for itself this being all the many people writing in complaining about the same problem with freeview reception. In addition since we have an upfront admission by this at800 company that this 4G transmission 'might' affect freeview transmission. Again I state that they should not have been allowed to begin 4G transmission unless they had resolved all known issues and they already knew it would affect freeview. So, can anyone tell us why they still went ahead with the 4G transmission ?
This is causing myself and many other people major hassle not of our doing. Yet we are the one's that have to do all the running around
to get it resolved. I wonder if all the CEO's , Directors and hierarchy of the companies involved with the 4G transmission have this problem with their freeview reception in their homes.
Jeff
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Sunday, 10 November 2013
Jeff Boyle: The "problem" is with your system due to the strength of the 4G signal that it is picking up. It is Freeview reception that is affected, not Freeview transmission. The solution can only ever be as it is now: filtering out the 4G signals.
TV aerial systems don't tend to be fitted with expensive filters that only allow through the frequencies used by the desired transmitter. Had they been so then there would not be an issue.
Some tests were run earlier this year and the results were that fewer than expected would be affected:
Expecting 4G interference? Tests now show that you have a one in 300 chance | 4G-at-800 | ukfree.tv - 11 years of independent, free digital TV advice
If people wish to spend their time writing to complain then this will achieve nothing, other than allowing them to have a moan. The decision to use the 800MHz band for 4G has already been taken. The time for viewers to make comments was when this was being planned.
The solution in most cases is to fit a filter. Where this doesn't work then at800 has an obligation to take other steps. It is hardly going to take such steps with a particular household - before the 4G transmitter is switched on - just incase a filter won't work!
In your case the filter should be fitted between the aerial and the signal amplifier.
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P
pikpilot11:34 AM
Swindon
I was about to post about the filter location and then saw the last line of the post above.
A filter should always be placed after the aerial and before the amplifier. The reason is that if placed after the amplifier, the amplifier input will try to amplify the strong unwanted signal (4G CH 60 in this case) and the amp can be overloaded. The result of that is is non-linear operation, possibly creating new unwanted interference on other frequencies, and with some amps, an automatic reduction of gain across the whole frequency range.
Go into the loft and place the filter before the amplifier and let us know the result.
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pikpilot's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
M
MikeB7:47 PM
Jeff Boyle: Looking at the various posts to your reception problem, something stands out - the main reason for concentrating on 4G interference is because that is what you strongly suggested it might be.
However, without that suggestion, the symptons of the problem would point to other factors.
Looking at the basics of the problem, you have recently lost all mux's, apart from the BBC PSB1. You have a loft aerial, with a powered splitter.
Unfortunately, you've given no postcode, so there is no way to check which transmitter, signal path, etc, but its unlikely that any change to a transmitter would result in less signal strength over the long-term. If anything, its the reverse.
If you had lost all muxs, or nearly all, it might be that this was becuase you had possibly retuned to another (more distant) transmitter, the signal of which was just enought to get you PSB1, but no more. However, its unlikely that this would happen on more than one TV (although its always worth checking).
I would suggest you look at your own system. If youe losing signal strength suddenly, its likely to be within the home system. Although you state that nothing has changed at your end, there could well have be a frayed coax, some moisture, a loose connection, etc which has degraded the signal to such an extent that you've lost all but the strongest signal.
Since you have a booster amp, check that the amp is actually working properly, there are no loose connections, and that the power supply is working properly.
PaulN on the Divis thread annouced 5 days ago that his loft amp's power supply had gone, and thus killing his signal . As he wrote 'Back in business with repaired loft amp. It must have been slowly dying for a while' - so it could be that part of the system slowly degrades, rather than stops working altogether suddenly.
If you give a postcode, we can see if there are any 4G stations near you, etc. However, if you look at the number of people who blame 4G, there are actually relatively few who seem to have a problem which is cured by a filter, which suggests that 4G was not a factor in the first place. The fact that yours was not would point to that conclusion.
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P
Pierre Josling9:44 PM
Hungerford
MikeB: Hi Mike
I live in Lambourn RG17 8NP which receives Freeview from the lambourn repeater
(signal starts at Hannington). Since about the 22nd October the commercial stations (ITV, Ch4 Ch5 etc) all started to have audio and video drop out. I have a new wideband digital aerial designed for poor reception areas and the problem still occurs, although Ch 4 seems to have improved.
My neighbour across the road also has the same problem. I have also this weekend installed new cable and changed TV's
Any idea's could it be 4G?
Any idea's would be useful.
Rgds
Pierre
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Pierre's: mapP's Freeview map terrainP's terrain plot wavesP's frequency data P's Freeview Detailed Coverage
Pierre Josling: If there is going to be one channel from Lambourn that is affected then it will be PSB2 (which carries ITV, Channel 4, Channel 5 etc) as it is on the highest UHF channel, it being C58.
Judging by the fact that the metal tower to which the TV broadcast antennas are fitted also has what appear on Streetview to be three sets of mobile phone antennas (so possibly three network operators) there is the possibility that it is being used for 4G transmissions. Obviously with your aerial pointing to the TV transmitter it is also pointing to any potential 4G base station at that location.
I suggest that you give at800 a ring and see if there are any 4G base stations in your area - see at800 | 4G & Freeview | 4G Interference | 4G Filters | at 800 MHz
By the way, I'm not sure why you've changed your aerial. There is no such thing as a "digital aerial" and a wideband aerial isn't required for Lambourn. It is perhaps wishful thinking that you might get more channels than you have!
All channels from Lambourn are within Group C/D, as they were for the former analogue. And the transmission power is, in real terms, a little above that of the former analogue.
I put myself on Hungerford Hill on Streetview and the other side of the valley can be seen. Even with a power of 2W, with clear line-of-sight at 3/4 mile you won't need anything special.
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Pierre Josling: If you have a signal amplifier (booster) connected then perhaps you don't need it and indeed, perhaps it is that which is overloading.
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Tuesday, 12 November 2013
N
Neil5:16 PM
Just to report back on my problems from
"Friday 5 July 2013 5:38PM Newbury"
I finally got a TV engineer round and he turned the aerial to point at Hannington but still got too low db reading at TV end. Then he checked masthead pre-amp and discovered it was dead (well -10db instead of gain).
Really weird thing is it also picks up CP (which is almost 90deg and much further away). The only reason I can think of is that now it has swung round it is very close to our neighbours aerial (not in use I suspect) that points at CP. Anyway, had to manually tune everything and turn off the auto detect feature otherwise the perfectly good channels get replaced by duff ones (grrrr).
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Wednesday, 11 December 2013
T
Tig Minor2:06 PM
Faringdon
Is anyone else experiencing reception problems today from the Oxford transmitter? I can only receive BBC1 and BBC2 at the moment. Thought it might be to do with foggy conditions but these have now cleared. Reception usually perfect. Post code SN7 7HY
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Tig's: mapT's Freeview map terrainT's terrain plot wavesT's frequency data T's Freeview Detailed Coverage
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