From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from claranet-outbound-smtp01.uk.clara.net ([195.8.89.34]:59554 "EHLO claranet-outbound-smtp01.uk.clara.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753327Ab3AJKTp convert rfc822-to-8bit (ORCPT ); Thu, 10 Jan 2013 05:19:45 -0500 From: Simon Farnsworth To: Mauro Carvalho Chehab Cc: Devin Heitmueller , Frank =?ISO-8859-1?Q?Sch=E4fer?= , Linux Media Mailing List Subject: Re: [PATCH RFCv9 1/4] dvb: Add DVBv5 stats properties for Quality of Service Date: Thu, 10 Jan 2013 10:19:34 +0000 Message-ID: <19692716.qk9lES9tlU@f17simon> In-Reply-To: <20130109132425.659243af@redhat.com> References: <1357604750-772-1-git-send-email-mchehab@redhat.com> <9912400.S8YXz1JbUM@f17simon> <20130109132425.659243af@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="utf-8" Sender: linux-media-owner@vger.kernel.org List-ID: On Wednesday 9 January 2013 13:24:25 Mauro Carvalho Chehab wrote: > Yes, it makes sense to document that the signal strength should be reported > on either dBm or dBµW, if the scale is FE_SCALE_DECIBEL. I prefer to specify > it in terms of Watt (or a submultiple) than in terms of voltage/impedance, as > different Countries use different impedances on DTV cabling (typically, > 50Ω or 75Ω). > > So, either dBm or dBµW works for me. As you said, applications can convert > between those mesures as they wish, by simply adding some constant when > displaying the power measure. > > As the wifi subsytem use dBm, I vote for using dBm for the signal measure > at the subsystem (actually, 0.1 dBm). > 0.1 dBm suits me. I just want something that I can present to the end user in a format that will match their aerial installer's kit. -- Simon Farnsworth Software Engineer ONELAN Ltd http://www.onelan.com