From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from smtp-out.google.com ([216.239.33.17]) by www.linuxtv.org with esmtp (Exim 4.63) (envelope-from ) id 1JjWiN-0006GP-M3 for linux-dvb@linuxtv.org; Wed, 09 Apr 2008 11:35:38 +0200 Received: from spaceape23.eur.corp.google.com (spaceape23.eur.corp.google.com [172.28.16.75]) by smtp-out.google.com with ESMTP id m399ZTGB014146 for ; Wed, 9 Apr 2008 10:35:29 +0100 Received: from [172.16.21.211] (dhcp-172-16-21-211.lon.corp.google.com [172.16.21.211]) (authenticated bits=0) by spaceape23.eur.corp.google.com with ESMTP id m399ZSun026333 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT) for ; Wed, 9 Apr 2008 10:35:29 +0100 Message-ID: <47FC8DE0.3060202@dsl.pipex.com> Date: Wed, 09 Apr 2008 10:35:28 +0100 From: David Harvey MIME-Version: 1.0 To: linux-dvb@linuxtv.org References: In-Reply-To: Subject: Re: [linux-dvb] WinTV-NOVA-TD & low power muxes (Philip Pemberton) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: linux-dvb-bounces@linuxtv.org Errors-To: linux-dvb-bounces+mchehab=infradead.org@linuxtv.org List-ID: /Message: 4 Date: Tue, 08 Apr 2008 23:27:34 +0100 From: Philip Pemberton Subject: Re: [linux-dvb] WinTV-NOVA-TD & low power muxes To: Greg Thomas , linux-dvb Message-ID: <47FBF156.5090703@philpem.me.uk> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Greg Thomas wrote: / > /> After trying the latest drivers, I had a go under Windows; exactly the > > same set of channels. I just guess the Nova-TD isn't that sensitive. I > > may just have to look at boosting my signal, somehow :( / > / Disclaimer: this is the problem as I understand it, and anything I say should be treated as an unproven theory until proved otherwise... The Nova-TD seems to have an odd problem. Specifically, it seems to have some form of wideband low-gain amplifier/buffer on each aerial input (nothing like the high-gain narrowband LNA amplifier on the Nova-T-500). This takes into account the strongest muxes, not the mux you're currently tuned to (the T500 seems to do the latter -- which is more sensible). What this means is that if you've got one mux that's significantly weaker than the others -- e.g. the one that carries FilmFour vs. the PSB mux that carries BBC ONE -- you'll see a reasonable signal on BBC, but a poor signal (if you get a lock at all) on FilmFour. What I did was put a 6dB attenuator between my aerial and the Nova-TD. This weakens the signal to the point that all the muxes are in the Nova's capture range. It locks on, and you get a near perfect signal on all the muxes. Of course, it might just be that the input can't handle being overloaded, or was designed for the two shabby WiFi-style antennae that were bundles with the Nova-TD (which are truly useless). Those things probably wouldn't even work if you were within a mile of the transmitter... My signal's coming from Emley Moor, ~16 miles distance via a mid-high gain wideband aerial./ -- Phil. | (\_/) This is Bunny. Copy and paste Bunny lists@philpem.me.uk | (='.'=) into your signature to help him gain http://www.philpem.me.uk/ | (")_(") world domination. I vaguely remember someone mentioning this problem doesn't affect the TD card/stick under the Windows driver. Can anyone confirm this? Cheers, dh : _______________________________________________ linux-dvb mailing list linux-dvb@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb