From: David Matthews <dm@prolingua.co.uk>
To: linux-dvb <linux-dvb@linuxtv.org>
Subject: Re: [linux-dvb] Updated scan file for uk-EmleyMoor
Date: Fri, 07 Mar 2008 14:08:49 +0000 [thread overview]
Message-ID: <47D14C71.5040400@prolingua.co.uk> (raw)
In-Reply-To: <47D0EA5B.8040105@philpem.me.uk>
Philip Pemberton wrote:
> Here's a scan file for Emley Moor with the correct frequencies and tuning
> parameters... Seems the one in the linux-dvb distribution has frequencies with
> a -133kHz or so offset, and without the correct QAM parameters. Probably my
> fault, because IIRC I submitted that tuning file...
>
> Data sourced from www.ukfree.tv, and works fine on my HVR-3000.
>
> # Emley Moor, West Yorkshire
> # T freq bw fec_hi fec_lo mod transmission-mode guard-interval hierarchy
> T 626000000 8MHz 2/3 3/4 QAM64 2k 1/32 NONE
> T 650000000 8MHz 2/3 3/4 QAM64 2k 1/32 NONE
> T 674000000 8MHz 3/4 3/4 QAM16 2k 1/32 NONE
> T 698000000 8MHz 3/4 3/4 QAM16 2k 1/32 NONE
> T 706000000 8MHz 3/4 3/4 QAM16 2k 1/32 NONE
> T 722000000 8MHz 3/4 3/4 QAM16 2k 1/32 NONE
Have you looked at the Ofcom site? You may find that the current
frequencies are actually correct. Apparently all the transmitters at
Emley Moor have a 166kHz offset, either + or - depending on the channel.
See
http://www.ofcom.org.uk/static/reception_advice/dtt_pocket_guide_3_0.pdf
which lists all the UK transmitters and their offsets.
www.ukfree.tv seems to ignore the offset and just include the base
channel number. Generally it doesn't matter since the bandwidth of the
tuner will be more than sufficient. Of course, it would be a good idea
to fix the QAM parameters if they're wrong.
David
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next prev parent reply other threads:[~2008-03-07 14:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-07 7:10 [linux-dvb] Updated scan file for uk-EmleyMoor Philip Pemberton
2008-03-07 14:08 ` David Matthews [this message]
2008-03-08 21:45 ` Philip Pemberton
2008-03-08 21:59 ` Philip Pemberton
2008-03-07 14:20 ` Christoph Pfister
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