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C49 (698.0MHz) after switchover

The map below shows all the transmitters in the UK using C49 once digtial switchover is complete. Please click the icon to see the coverage area, and double click for more information.

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What do the map symbols mean?

 COM5/ArqivaA multiplex,  COM6/ArqivaB multiplex,  COM6/ArqivaB multiplex,  PSB1/BBCA multiplex,  PSB1/BBCA multiplex,  PSB2/Digital 3+4 multiplex,  PSB2/Digital 3+4 multiplex,  PSB3/BBCB/Freeview HD multiplex,  PSB3/BBCB/Freeview HD multiplex,  Saorview multiplex 2,  Saorview multiplex 2.

Before switchover

Click on a selection to see the use of the frequency use before switchover:

C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 C63 C64 C65 C66 C67 C68

Switchover complete

Click on a selection to see the use of the frequency use when switchover is complete:

C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 C33 C34 C35 C36 C37 C38 C39 C40 C41 C42 C43 C44 C45 C46 C47 C48 C49 C50 C51 C52 C53 C54 C55 C56 C57 C58 C59 C60 C61 C62 * * * * * *

Tuesday, 12 July 2011

9:11 AM

Mike Incles: Check for single frequency interference on C49. You mention that you are high up, I wonder if you are receiving a signal from Sudbury which changed the frequency of the SDN mux to C49 on 6th July 2011.What is your postcode?- so a check can be made on the trade predictor of what you are expected to be able to receive at your location.

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KMJ,Derby's 1,811 posts GB
Mike Dimmick

12:41 PM

KMJ,Derby: It appears that the Sudbury transmission on C49 was restricted to the west to protect Oxford C5, and that this may have been done by transmitting out-of-phase signals from the lower aerial panels on the west side of the 'digital' mast in addition to the main signals from the top of that mast.

There was no restriction on Mux A before switchover, so it's possible that the out-of-phase signals providing the restriction are no longer transmitted - if that's how it was done.

Information sources: Sudbury Transmitter (note MUX3 = Mux A in this table), U.K. Television Stations (UHF Digital System) for aerial heights which indicate that there was a contribution from both arrays for Mux 1 and B, and the pictures at mb21 - The Transmission Gallery .

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Mike Dimmick's 2,486 posts GB

4:16 PM

Mike Dimmick: It would be very interesting to see the radiation patterns for Sudbury, which due to a shortage of frequencies together with a need to deliver a signal strong enough to give reasonable coverage in the face of possible interference from the continent has led to more complicated arrangements for serving the area than would normally be necessary. It would not be surprising if any restriction to protect C5 from Oxford has been lifted with the Oxford switchover only a few weeks away.

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KMJ,Derby's 1,811 posts GB
Monday, 18 July 2011
7:25 PM

I live in London NW5 and cannot get the channels on multiplex 2 ITV1, More4 etc. I believe I had these channels until the other day.

I have done a complete retune but to no avail.

What now, please?

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KTbird's 2 posts GB
Tuesday, 19 July 2011
Mike Incles
9:00 AM

KMJ Derby. Thanks for the info. My postcode is NN17 2LQ. Everything else comes in "to perfection" ( as did C49 carrying BBC 1 East Midlands till around the 6th July ). Maybe I should wait for the Waltham "re-set" in August. Anyway, thanks for your reply. Much appreciated.

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Mike Incles's 10 posts GB
Sunday, 1 April 2012
Alan Pryde
10:33 AM

Is there any known reason why Ch 50 (706mhz)programmes on the Fortrose & Rosemarkie transmitter are running with such a poor signal quality & error rate? All other channels from the same transmitter are sitting @ 100% quality signal, but 706mhz channels are unwatchable due to poor signal quality. I have a clear uninterrupted line of sight to the transmitter.

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Alan Pryde's 1 post GB
Thursday, 5 April 2012

11:00 AM

Alan Pryde: If you have that type of reception issue, then the problem isn't with the transmitter! Please see Single frequency interference | - independent free digital TV advice .

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Briantist's 38,844 posts GB
Friday, 31 August 2012
Bob Thurlow
6:45 PM

Since I re-tuned for the Olympics I lose BBC1 & BBC2 when I switch off. If I re-tune again they come back until I switch off, then they are lost again.
Any ideas??

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Bob Thurlow's 1 post GB
Thursday, 12 September 2013
john coulter
12:55 PM

Hello, I live in the bd20 6ha area of Keighley,
ever since the changeover in May BBC C49 seems to come and go at will, when we do receive C49 its full signal and very good quality, turn over to ITV or any channel and back again BBC go's. The Aerial, cable, and fittings are all new as is the T.V. Done everything retuned with Aerial out then back in,manual tune, but the problem still persists .
All the other channels are OK it's only C49 that's the problem

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john coulter's 2 posts GB
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