From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from fmmailgate02.web.de ([217.72.192.227]:54752 "EHLO fmmailgate02.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932984Ab0D3RaB (ORCPT ); Fri, 30 Apr 2010 13:30:01 -0400 Message-ID: <4BDA6E47.6050200@web.de> Date: Fri, 30 Apr 2010 07:44:39 +0200 From: =?UTF-8?B?QW5kcsOpIFdlaWRlbWFubg==?= MIME-Version: 1.0 To: hermann pitton CC: linux-media@vger.kernel.org Subject: Re: [PATCH] TT S2-1600 allow more current for diseqc References: <20100411231805.4bc7fdef@borg.bxl.tuxicoman.be> <4BD7E7A3.2060101@web.de> <20100428103303.2fe4c9ea@zombie> <1272587465.3305.34.camel@pc07.localdom.local> In-Reply-To: <1272587465.3305.34.camel@pc07.localdom.local> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-media-owner@vger.kernel.org List-ID: Hi Hermann, On 30.04.2010 02:31, hermann pitton wrote: > Hi, > > Am Mittwoch, den 28.04.2010, 17:13 +0400 schrieb Manu Abraham: >> On Wed, Apr 28, 2010 at 12:33 PM, Guy Martin wrote: >>> On Wed, 28 Apr 2010 09:45:39 +0200 >>> André Weidemann wrote: >>> >>>> I advise not to pull this change into the kernel sources. >>>> The card has only been testet with the a maximum current of 515mA. >>>> Anything above is outside the specification for this card. >>> >>> >>> I'm currently running two of these cards in the same box with this >>> patch. >>> Actually, later on I've even set curlim = SEC_CURRENT_LIM_OFF because >>> sometimes diseqc wasn't working fine and that seemed to solve the >>> problem. >> >> I would advise to not do this: since disabling current limiting etc >> will cause a large problem in the case of a short circuit thereby no >> protection to the hardware. In such an event, it could probably damage >> the tracks carrying power on the card as well as the tracks on the >> motherboard, and in some cases the gold finches themselves and or the >> PCI connector. >> >> Generally, there are only a few devices capable of sourcing> 0.5A, So >> I wonder .... >> >> Regards, >> Manu > > for the few devices I do have, you seem to be for sure right. > > All the Creatix stuff drawing up to 900mA on a potentially dual isl6405 > has direct voltage from the PSU over an extra floppy connector. > > Max. 500mA should be sufficient with a DiSEqC 1.2 compliant rotor. > Nothing else should come above that limit. > > I wonder, if someone close in reading specs just now, can tell if 900mA > can be sufficient for two rotors ;) > > Andre, BTW, assuming you still have a CTX944 (md8800 Quad), can you > measure if the 16be:0008 device really does switch between 13 and 18V. You seem to mistake me for someone else. I do not have a CTX944 and never had. Regards André