Full Freeview on the Oxford (Oxfordshire, England) transmitter
Brian Butterworth first published this on - UK Free TV
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.
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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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Monday, 5 December 2022
C
Chris.SE2:58 PM
Les - I'm splitting the post again to find the problem
We could do with a bit more information about the problem and the installation.
Does this start at any particular time of day?
Do you have any reception problems with the HD channels on 101-106/109?
What sort of quality figures (or BER - Bit error rate) do you typically get for the PSB2 multiplex UHF C44 and the HD multiplex on UHF C47?
Do you have problems with any other groups of channels (muxes) eg. COMs4-6?
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C
Chris.SE3:03 PM
Les - I've been editing bits of the post to try and solve the posting issue!
Roughly how old is your aerial installation? Do you know what type of aerial it is?
Do you have any amplifier/splitter to feed more than one TV? If so, what make and model is it?
Have you checked all your coax plugs and connections behind your TV?
Make sure that you don't have any HDMI cables running close to your aerial cables.
Have you ever received a postcard from restoretv.uk ?
Don't forget that full postcode.
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Tuesday, 14 February 2023
S
Stephen Petitt3:26 PM
We've lost MUX4 on Tuesday 14/2/23 at 15:24, none of the channels are showing in our EPG, we have previously lost reception due to atmospherics but nothing about today's forecast appears to be the extremes that we have previously had so loathe to do another re-tune.
Anybody else experiencing this problem.
Thanks
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C
Chris.SE3:44 PM
Stephen Petitt:
Do NOT retune. There has been some quite strong tropospheric ducting/temperature inversion periodically affecting large parts of the UK in recent days. This is predicted to ease as the day progresses. Not all multiplexes will be affected, it depends on where the interference is coming from as it can be very frequency dependant.
It is never advised to retune when you have no signal or badly pixellated pictures as this usually just clears your correct tuning, or you end up tuned to some distant transmitter whose signals disappear as conditions change. You then have to retune again, which you may have to try several times as you won't know when the signals are normal!
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Wednesday, 14 June 2023
K
keith batt4:33 AM
signal keeps coming up tv as weak, have retuned a couple of times but not any better, lost at least chan 3 to 8 and bbc shows as weak.
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C
Chris.SE5:14 AM
keith batt:
It is never advised to retune when you have no/very weak signals or/pixellated pictures if you were correctly tuned in the first place as this very often just clears your correct tuning.
There has been some quite strong tropospheric ducting/temperature inversion periodically affecting large parts of the UK in recent days. Retuning means you can end up tuned to some distant transmitter whose signals disappear as conditions change. You then have to retune again, which you may have to try several times as you won't know when the signals are normal! Not all multiplexes will be affected, it depends on where the interference is coming from as it can be very frequency dependant.
As you haven't given a full postcode, we can't advise if there are other specific issues that may affect reception in your area. Have you checked that your aerial still looks intact and is pointing correctly?
Have you checked all your coax plugs and connections behind your TV?
Make sure that you don't have any HDMI cables running close to your aerial cables.
Have you ever received a postcard from restoretv.uk ?
Your best bet may be to find which multiplexes you are currently missing, see
Channel listings for Industry Professionals | Freeview for which TV channels are carried on which multiplex and then manually retune the relevant UHF channel for the Oxford transmitter.
Note, if you normally receive the Local multiplex (depends on location) Oxford uses 2 UHF channels C22 & C46 which are beamed in different directions and which you get (if either) will depend on location.
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K
keith batt6:57 AM
Aylesbury
Chris.SE: thanks for all the advice, slowly some are coming back but not full strength, HP21 8TA.
Thanks again
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keith's: mapK's Freeview map terrainK's terrain plot wavesK's frequency data K's Freeview Detailed Coverage
Saturday, 2 September 2023
S
Stephen Petitt12:08 AM
This is a bit of a strange one.
According to all the listings I can find BBC1HD/2HD/3HD/4HD and ITV HD/Channel 4HD/Channel 5HD are all on the same MUX.
Keeping it simple I have two tuners both capable of receiving the HD channels.
Tonight as I write, one is recording Channel 4 HD and the other is recording BBC 1HD/4HD ITV HD and Channel 5HD.
I can't figure out why they are split. Any ideas?
Thanks
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C
Chris.SE5:16 AM
Stephen Petitt:
I'm not finding your "explanation" as clear as it could be. I'm not sure what you mean by "split".
Yes they are all on the same BBCB HD (PSB3) mux which is UHF channel C47 at Oxford.
You aren't perhaps also tuned/receiving this mux from another transmitter which could be received in your locale? If so, those TV channels would be on different LCNs, probably 800s, if either tuner has more than one transmitter.
I'm wondering if another possibility might be causing confusion - that's something called CLM (Channel List Management) which is now operative for BBC channels on some of the latest Freeview Play compliant devices. This is where the BBC HD channels are copied to LCNs 1, 2, 9 (BBC4HD), 23 (BBC3HD) and the SD versions moved to 611, 612, 613, 614.
CBeebies & CBBC HD and SD are swapped LCNs to add to the confusion!
Apparently, if your internet connection goes down for a lengthy period, the channels can swap,back (or even end up in the 800s)!
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Monday, 4 September 2023
S
Stephen Petitt2:46 PM
Chris.SE:
Thanks for replying
Sorry, it all seemed clear to me :)
By split, I mean that I would expect them to all be recording on the same tuner, whichever was used for the first HD recording.
The tuners only have information for the Oxford Transmitter, I'm using MediaPortal, so you supply a fixed set of frequencies to scan. They don't scan the whole range.
The behaviour is similar to the Channel list Management you mention but these are not Freeview Play devices.
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