From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from moutng.kundenserver.de ([212.227.126.186]:60776 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755585AbZDMJ10 (ORCPT ); Mon, 13 Apr 2009 05:27:26 -0400 Message-ID: <49E30575.4060202@retrodesignfan.eu> Date: Mon, 13 Apr 2009 11:27:17 +0200 From: Marco Borm MIME-Version: 1.0 To: linux-media@vger.kernel.org Subject: Re: [linux-dvb] DVB-T USB dib0700 device recommendations? References: <20090411221740.GB12581@www.viadmin.org> <49E2A0E1.4020407@retrodesignfan.eu> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: Hi Markus, it seams that you don't know what the Hauppauge Nova-T 500 is: Its not a USB device itself, its a PCI card with a VIA PCI/USB-Bridge Chip connected to multiple DIBcom USB chips: http://www.bttv-gallery.de/high/bttv-gallery.html I bought the card with the idea in mind that it uses low power USB technology, but that was a mistake. Next time I will buy a real usb device and know it isn't allowed to eat more than 2.5W. Greetings, Marco Markus Rechberger wrote: > On Mon, Apr 13, 2009 at 4:18 AM, Marco Borm wrote: > >> Hi Henrik, >> >> one of the cards in my system is the dib0700 based "'Hauppauge Nova-T 500". >> Compared with the "TerraTec Cinergy 1400" I would say that the receiver >> sensitivity is worse but the main problem I have is that the card >> consumes a loot of energy (8-13W), which is much more than the >> Terratec(5-6W). >> > > That's a little bit weird USB itself should provide max 5V 500mA which would be > 2.5 Watt; if it requires more then the device has to be self powered. > > Maybe you can try to use a different USB device (eg. storage) just for > testing the > consumption. USB is supposed to require alot power (the controller). > You might try to unload the ehci/ohci driver too. > > Markus > > >> I calculated this using measure values of the whole system captured with >> a Conrad/Voltcraft Energy Monitor 3000. >> Personally I am little bit shocked about that and wondering if this can >> be true because the dib is a USB-device, but the Voltcraft is one of the >> better measurement device. >> Maybe the VIA usb-hub controller on the board is the problem?! >> >> Would be interesting of someone has the same or other experiences with >> this card or other PCI based cards. Hauppauge ignores all my questions, >> so I can't recomment products of this manufacturer anyway. >> >> >> Greetings, >> Marco >> >> H. Langos wrote: >> >>> I've been trying to minimize energy consumption [...] But before running >>> out in the street and buying the first dib0700 device I'd like to know if >>> there are any devices that are >>> >>> - especially good [...] >>> >>> or >>> >>> - especially bad [...] >>> >>> >>> _______________________________________________ >>> linux-dvb users mailing list >>> For V4L/DVB development, please use instead linux-media@vger.kernel.org >>> linux-dvb@linuxtv.org >>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb >>> >>> >>> >> _______________________________________________ >> linux-dvb users mailing list >> For V4L/DVB development, please use instead linux-media@vger.kernel.org >> linux-dvb@linuxtv.org >> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb >> >> > > _______________________________________________ > linux-dvb users mailing list > For V4L/DVB development, please use instead linux-media@vger.kernel.org > linux-dvb@linuxtv.org > http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb > >