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  Reply # 1862951 12-Sep-2017 16:40
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What I learned when installing my antenna is that DVB-T has some funny quirks. Digital tends to be all or nothing so a marginal signal can either look perfect or pixelated depending on small changes. The other thing is that UHF reflects in odd ways, which can also affect reception. We aren't surrounded by houses but there was a big hill in the way, much higher than the aerial could go. Yet I found a sweet spot on a high mast that gave us perfect reception. Higher or lower deteriorated the signal, but the height that worked, a few meters above the roof, worked perfectly.

 

 





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Tel69
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  Reply # 1862956 12-Sep-2017 16:57
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Rikkitic:

 

What I learned when installing my antenna is that DVB-T has some funny quirks. Digital tends to be all or nothing so a marginal signal can either look perfect or pixelated depending on small changes. The other thing is that UHF reflects in odd ways, which can also affect reception. We aren't surrounded by houses but there was a big hill in the way, much higher than the aerial could go. Yet I found a sweet spot on a high mast that gave us perfect reception. Higher or lower deteriorated the signal, but the height that worked, a few meters above the roof, worked perfectly.

 

 

Thanks Rikkitic,
I have no doubt the people coming over to fix this will have their signal quality monitors as such, but as you say go with what works.
It all comes down to the result, if it works and it works solidly then who can complain.

 

Cheers
Terry


 
 
 
 


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  Reply # 1862984 12-Sep-2017 17:51
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Yeh lazy project manager and sparkly.
There would have been a few extra $$ for the job if they thought about it at the start.



Tel69
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  Reply # 1867581 17-Sep-2017 17:16
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Still working on this, the builders of the house agree the aerial is not in the right place. (Go figure)
Just waiting on the sparky that installed it to contact me and then I'll update this with the resolution. (as if we don't know)




Tel69
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  Reply # 1869616 20-Sep-2017 17:40
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OK, complete resolution.
1) Big as pole on the roof to attach the aerial to.
2) Pointing the aerial so it is actually looking at the transmitter. (The first problem they found was the aerial was pointing in the wrong direction)
3) Prime signal still weak but usable, when we have some bad weather will prove if it holds viewable.
I might look at an amplified splitter.

 

They did not want to move the aerial as they would have to have scaffolding erected just to go on the roof (Health and safety).
I'll tick the answers but in reality we all knew what the problem was (baring them not knowing how to point the aerial in the right direction).

 

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Tel


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  Reply # 1869702 20-Sep-2017 19:52
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Please take a photo

 

 




Tel69
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  Reply # 1869778 20-Sep-2017 20:38
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Yup, will do tomorrow.
(The fix and I'll measure the length of the gap to the roof of the new house being built and the aerial in it's original position, but it was a couple of arm lengths roughly.)
To be honest I think it is a stop gap approach because the whole moving it on the roof involves scaffolding being erected in the first place.

 

EDIT:
Added image of fix
Click to see full size


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