Freeview reception at CH1 6BE
Terrain between CH16BE and Freeview mastsFor 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: .
What do the map symbols mean?location on line-of-sight, Selected location, Freeview transmitter, Freeview light transmitter, Engineering/fault today....array ( 'P' => 'CH16BE', 'dt' => '', 'g' => '', 's' => 'terrain', 'advanced' => '', 'newx' => '', 'newy' => '', 'newz' => '', )
Advanced optionsShow good and blocked paths from CH1 6BE 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)
Sunday, 24 February 2019
Saturday, 23 March 2019
I'm still somewhat puzzled by the 700MHz Clearance plan for the Sandy Heath transmission area. According to the schedules there are no further retunes planned - but RF Channels 51 (Com4), 55 (Com7) and 56 (Com8) are still in use - and all are above 700MHz.
I have seen comments on the web that Com7 and Com8 will no longer be available within the next two years or so. Is that nationwide or just for some areas? If it applies to Sandy Heath this would remove the transmissions currently on 746MHz and 754MHz - but it would still leave Com4 in the 700MHz band on 714MHz.
If Channels 55 and 56 ARE lost, are there any plans for Com7 and Com8 to be reassigned to other channels - or will their services be lost for ever?
I'll be grateful if someone can clarify the Clearance definitively.
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Sunday, 24 March 2019
GeordieLad: According to Digital UK, COM4 will move to UHF channel 33 at Sandy Heath early next year. COM7 & COM8 are expected to closed from all transmitters by mid-2022. UHF channels 55 & 56 sit in what will be the centre gap of the 700MHz 5G band and is expected to be auctioned off to the mobile networks for use as supplemental downlink spectrum. Some transmitters will loose COM7 & COM8 this year, presumably because no one is prepared to pay for the costs of re-engineering them when they will only be around for another 3 years.
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