Freeview reception at KT24 5DX
Terrain between KT245DX 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' => 'KT245DX', 'dt' => '', 'g' => '', 's' => 'terrain', 'advanced' => '', 'newx' => '', 'newy' => '', 'newz' => '', )
Advanced optionsShow good and blocked paths from KT24 5DX 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)
Wednesday, 22 May 2019
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.
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