[mythtv-users] Picking the best signal strength (DVB-T and DVB-T2, UK)

[Simon Hobson]

Keith Edmunds wrote:

>Background: I'm in the UK, Forest of Dean, nearest transmitter Ridge Hill
>(about 21.5Km away).
>
>If I carry out a scan, I get the usual unique and duplicate channels
>found, and I add them all. I will then find that I have, for example, two
>"BBC HD" channels. I suspect they are from different transmitters, but how
>can I tell which is the strongest signal?
>
>What I used to do: I used to edit the dtv_multiplex table and remove all
>the entries with frequencies that were not listed at
>http://www.ukfree.tv/txdetail.php?a=SO630333 (ie, those from Ridge Hill).
>I'd then remove any entries in the channel table that referred to the
>now-deleted mplexid entries.

First off, try the reception predictor at 
http://www.wolfbane.com/cgi-bin/tvd.exe

It'll tell you what transmitters you should be able to get  signal 
from, and which muxes they carry on what channels. Though at the 
moment it seems to have a problem as it's not including Winter Hill 
for me which is a bit odd as that's my best transmitter.

Up here, all our main signals (from Winter Hill) are up at the top of 
the band, and all the repeaters are down in the middle. So it's 
possible to leave the antenna connection out of the TV which it goes 
past the local repeaters, and then plug it back in before the scan 
reaches the main channels. That doesn't work for everyone.

Alternatively, once you've worked out which transports are actually 
useful, you can do a scan of exiting transports to get the channels 
on just those.

-- 
Simon Hobson

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