C25 (506.0MHz) before switchover
The map below shows all the transmitters in the UK using C25 before digital switchover started. 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?
BBC TWO, ITV plc region, Channel 4, S4C, Multiplex 1, Multiplex 2, Multiplex A.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 * * * * * *
Sunday, 2 October 2011
G
GeoffEff11:09 AM
Having problem since full switchover of the Sutton Coldfield transmitter. Can normally receive all channels with high signal strength and good quality. C25 which includes ITV, Channel4 and Channel 5 will suddenly go pixelate and go off. The signal goes from high quality to zero quality even though the signal strength is still very high. All other channels still received with no problems at all. Any ideas please.
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Thursday, 13 October 2011
GeoffEff: Can you please see Freeview intermittent interference | ukfree.tv - independent free digital TV advice ?
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Tuesday, 19 November 2024
J
Jim Gray10:19 PM
Peterculter
Hi,
I've been having what appears to be intermittent issues with certain channels over the last few weeks - picture breaking up, heavily pixelated.
Looking into this in a bit more depth on the TV signal test, it appears to be around 2 or 3 channels, where signal strength is quite low (channel 25, 10%, channel 26, 14-18%), and signal quality is around (channel 25, 0-12%, channel 26, 68-88%). Channel 23 not great either (strength circa 22%, Quality circa 55-91%). Channel 22 and 28 are showing around 42% for strength and 100% for Quality.
Don't know whether I need to climb on the roof to see if my aerial has moved, or if there is something else going on.
Post Code is AB14 0RA, served by Durris mast.
Can you help?
Many thanks
Jim
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Jim's: mapJ's Freeview map terrainJ's terrain plot wavesJ's frequency data J's Freeview Detailed Coverage
Wednesday, 20 November 2024
S
Steve Donaldson2:41 AM
Jim Gray: There has been and might still be engineering works at Durris, so I advise you not to adjust your set or your aerial.
At the time of writing, the Freeview website does not list Durris as having engineering works:
Planned engineering works | Freeview
However, referring to the page on this site for Durris, there have been postings from Transmitter engineering every week since early October. These postings are taken automatically from the aforementioned Freeview page. The latest posting is from this Monday, so Durris must have been listed by Freeview as having engineering works on Monday. That it is now not listed, we don't know that it hasn't been removed prematurely.
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C
Chris.SE4:39 AM
Jim Gray:
I wouldn't go climbing on your roof in the current inclement weather conditions, or even when it improves a bit unless you have proper roof ladders etc.
You ought to able to check it's still pointing correctly without going on the roof, it should be approximately compass bearing 216 degrees, that's 9 degrees S of SW, and it's rods (or squashed Xs) should be horizontal. Also check that the coax downlead isn't flapping in the wind.
Check all the accessible coax connections behind your TV and any wall plate etc. checking for water ingress or corrosion.
As you are only 14km from the transmitter, I would not have expected those figures to be as bad, even with the planned engineering, but check you don't have any "new" obstructions on the line of sight to the transmitter, new tall buildings, trees grown very tall, close-by scaffolding or other construction.
If you find any water ingress in the coax or any wall plate etc. you may want to check the coax for damage to the sheath or ingress into the aerial connection box (in better weather!).
When you say intermittent issues - is this happening at certain times of day that are similar from day to day?
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S
Steve Donaldson12:35 PM
Jim Gray: With respect to reception along your road, at 100m or so out is the ground on which Prioryhill sits, to the rear of the medical centre. This is a higher than where you are and it is covered in trees. On Google Street View, standing on North Deeside Road, I can see the trees at the front of Prioryhill are very tall and they are right in your signal path.
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S
Steve Donaldson2:32 PM
Jim Gray: Further to the above, I see the section of your road that is your postcode is sloped, as well as the wider area not being flat. With this in mind it is more difficult to say which ground is higher as this varies along the road.
That said, the trees at the front of Prioryhill (the side facing North Deeside Road) and the side facing the medical centre being so tall do look as if they may be in the signal path to some degree for all properties in your postcode.
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Saturday, 23 November 2024
J
Jim Gray5:42 PM
Chris.SE: Thanks for your feedback and input, gives me more to look into. Haven't identified any pattern in the intermittent issues yet. No intention of checking in this weather :) , have ladders and can access in better weather to check.
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J
Jim Gray5:45 PM
Steve Donaldson: Thanks for your feedback and input, gives me more to look into. Hadn't considered the trees at Priory Hill so can investigate a bit more on this. Had considered some Engineering works but hadn't seen posted anywhere so again, I can investigate this a bit more. All appreciated.
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