[mythtv-users] Signal strength, DVB-T
Nicolas Will
nico at youplala.net
Fri Feb 1 17:00:47 UTC 2008
On Fri, 2008-02-01 at 18:47 +0200, Ismo Tanskanen wrote:
> MythTV typically reports a 30% to 35% signal strength - sometimes as
> low
> as 26% for Mux C - on the DVB-T channels I get (Nova-TD, external
> aerial, Crystal Palace transmitter.) This doesn't seem to be a problem
> for the picture quality but is it very low? Should I be buying a
> signal
> amplifier?
Maybe.
If you do, get a masthead amplifier. anything down le line will just
make the problem worse. You want to amplify the signal, not the injected
noise.
Here is what I am getting, 15 miles from UK-Durris
(http://www.ukfree.tv/txdetail.php?a=NO763899) :
Mux Mode Power Frequency Signal Ber Unc
=== ==== ===== ========= ====== ======== ========
B 16QAM 10 kW 713833330 38 % 209715 00000000
C 16QAM 5 kW 634000000 41 % 214722 00000000
D 16QAM 5 kW 658000000 41 % 209715 00000000
2 64QAM 20 kW 578000000 51 % 209715 00000000
1 16QAM 20 kW 546000000 46 % 209715 00000000
A 64QAM 20 kW 722166670 43 % 210289 00000000
Those are averages. Plenty of channels are unviewable.
I am getting a masthead amplifier installed!
The script used and full results are there.
http://www.youplala.net/~will/htpc/signaltest/
Nico
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