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Freeview reception at DD4+ 7UN


Terrain between DD47UN and Freeview masts

For reliable and stable Freeview reception, you need an unobstructed path between the TV aerial on your roof and the digital TV transmitter.

The diagrams below show the transmitters you can get a signal from - in order from best to worst. The blue line tests the line-of-sight between an aerial 10 metres above ground level (the line is red if there is an obstruction in the line-of-sight). You may be able to improve reception by raising the aerial higher - for safety's sake consult a reputable aerial installer if you need rooftop access. See below the diagrams for advanced options including selecting the receiver aerial height.

The terrain information (from Ordnance Survey and GIS) does not include forestation (where leaf cover changes with the seasons) or city buildings. The line-of-sight line can appear curved as this straight line moves over the Earth's surface.

When you click on a diagram, you will see map with the location selected shown with this symbol: .Internet Explorer 9+, Firefox, Opera, Chrome, and Safari required.Internet Explorer 9+, Firefox, Opera, Chrome, and Safari required.

What do the map symbols mean?

 location on line-of-sight,  Selected location,  Freeview transmitter,  Freeview light transmitter,  Engineering/fault today....array ( 'P' => 'DD4 7UN', 'dt' => '', 'g' => '', 's' => 'terrain', 'advanced' => '', 'newx' => '', 'newy' => '', 'newz' => '', )

 

Advanced options

Show good and blocked paths from DD4+ 7UN for aerial height of ...

10m20m (Angel of the North)25m30m40m56m (Hyde Park Flats, Sheffield)62m (Monument)90m (Royal Liver Building, Liverpool)107m (Meridian Quay Tower, Swansea)115m (Bridgewater Place, Leeds)127m (Glasgow Tower)143m (Guy's Hospital)158m (Blackpool Tower)170m (Spinnaker Tower, Portsmouth)180m (The Gherkin/BT Tower) 193m (Tower 42)235m (Canary Wharf)310m (The Shard)(default view)

Comments
Wednesday, 22 May 2019
C
Chris.SE
sentiment_satisfiedSilver

6:41 AM

D. A. Brown:

I know this reply is somewhat "late" but might still be useful.
Did you mean lose COMs 7&8 from the Humax PVR or from a TV set it's plugged into?

If the latter then maybe it's because the PVR has an RF pass-through that powers down in standby and because those COMs maybe transmitted at lower power than the others, there's not quite enough breakthrough of their signal whereas the others are strong enough for your set still to function OK.

If it's the PVR itself then maybe a full retune may help, first retune automatically with the aerial unplugged to clear all existing stored data, then do a manual tune for each UHF channel used by your transmitter.

link to this comment
Chris.SE's 168 posts GB
Monday, 3 June 2019
S
Shopps
12:25 PM

Chris.SE:
Hi all, just a quick update as i have been away for a week.
All of the com 7 and com 8 channels are not been received on any tv or set top box in the home. I own a Humax pvr, a Samsung smart tv, and an LG tv, all of these are now not receiving any com 7 or com 8 channels. I have retuned and also tried manual retunes on all devices but no luck.
I have checked and double checked my outdoor aerial & cabling.
No change.

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Shopps's 4 posts GB
Shopps's: mapS's Freeview map terrainS's terrain plot wavesS's frequency data wifiS's R&TI Service businessS's digitaluk trade radioS's DAB coverage
Tuesday, 4 June 2019
S
Stephen
sentiment_satisfiedBronze

12:05 AM
Brackley

I'm on the Oxford transmitter and I am having similar problems with Coms 7 & 8. I appear to have reception during the day until 8pm when I lose both of them

link to this comment
Stephen's 34 posts GB
Wednesday, 12 June 2019
Thursday, 13 June 2019
N
NasS
7:20 AM

Since monday i have lost all channels on com 7&8. anyone else in the crystal palace area having the same problems?

link to this comment
NasS's 11 posts GB
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Your comment please
Please post a question, answer or commentIf you have Freeview reception problems before posting a question your must first do this Freeview reset procedure then see: Freeview reception has changed, Single frequency interference, and Freeview intermittent interference.

If you have no satellite signal, see Sky Digibox says 'No Signal' or 'Technical fault'

If you have other problems, please provide a full (not partial) postcode (or preferably enter it in box at the top right) and indicate where if aerial is on the roof, in the loft or elsewhere.

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