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Freeview reception at CH1 6BE


Terrain between CH16BE 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.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' => 'CH16BE', 'dt' => '', 'g' => '', 's' => 'terrain', 'advanced' => '', 'newx' => '', 'newy' => '', 'newz' => '', )

 

Advanced options

Show 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)

Comments
Thursday, 3 January 2019
N
NasS
9:58 AM Woking

Using my tv's signal condition function I went through all available channels to see what's going on and on the whole the majority were 100% for strength and quality, however the channels that are on com7 and 8 multiplexes were funcualting up and down but ok for the picture and sound to be ok to view. Some were 0% for quality and 93% for strength and this caused a no signal issue. So that's the issue I have sometimes com7 and 8 are ok even though the strength & quality is going up/down, other times the same channel is 0% for quality but 93% for strength resulting in a no signal situation. Is the issue my end or crystal palace's end or both? Yes the aerial is pointing at crystal palace and is a wide band one.

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NasS's 10 posts GB
MikeP
3:48 PM

NasS:

The issue is at your end as the Crystal Palace transmitter, servicing more than 4 million homes, has no faults at present.

For some TVs, 100% signal strength is too high and some don't even like 90%. So it will be worth trying to reduce the strength a little to test what happens. Use a 3 dB coaxial attenuator fitted in the signal feed by adding a separate flylead with the attenuator at the joint between your original aerail cable and the flylead, the other end of the flylead being plugged into your TV's input socket. Then recheck the signal strengths fo all multiplexes again and observe what the effect on the pictures and sound is like. DO NOT RETUNE.



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MikeP's 2,567 posts Platinum Platinum GB
N
NasS
8:35 PM Woking

ok thanks Mike, just bought one off ebay, will let you know in due course

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NasS's 10 posts GB
Friday, 4 January 2019
N
NasS
3:53 PM

Just to add I can understand if I was near the transmitter but I am about 34 km away so too much signal shouldn't be a problem I would of thought however I have ordered the atteuator as you said which I will give a go. Also checked all channels last night and all good, the affected ones were showing low signal strength and quality but picture and sound was ok. You would not know the signal was soo low the picture and sound were that good without any break up. Both com 7 & 8 multi plexes are less power that the other ones so that might have a bearing on my issue.

link to this
NasS's 10 posts GB
Tuesday, 8 January 2019
N
NasS
8:40 AM Woking

just to update tried the attenuator last night and found no difference,

link to this
NasS's 10 posts GB
MikeP
12:41 PM

NasS:

Please provide the signal strength readings for all channels and check that you are tuned correctly to the required transmitter (use the Digital UJ Coverage Checker to ensure you are using the best transmitter for your location and what channels it uses). Also recheck all the aerial cables and connections.





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MikeP's 2,567 posts Platinum Platinum 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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