From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from avasout06.plus.net ([212.159.14.18]:47104 "EHLO avasout06.plus.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758574AbbEaWax (ORCPT ); Sun, 31 May 2015 18:30:53 -0400 Message-ID: <556B8B98.5050602@baker-net.org.uk> Date: Sun, 31 May 2015 23:30:48 +0100 From: Adam Baker MIME-Version: 1.0 To: Antti Palosaari , linux-media@vger.kernel.org Subject: Re: [PATCH 2/2] si2157: implement signal strength stats References: <1432933510-19028-1-git-send-email-crope@iki.fi> <1432933510-19028-2-git-send-email-crope@iki.fi> In-Reply-To: <1432933510-19028-2-git-send-email-crope@iki.fi> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-media-owner@vger.kernel.org List-ID: On 29/05/15 22:05, Antti Palosaari wrote: > Implement DVBv5 signal strength stats. Returns dBm. > > Signed-off-by: Antti Palosaari > --- Tested-by: Adam Baker I don't have the test gear to verify the absolute levels but the signal level readings were close to those obtained feeding the same signal into a Hauppauge Nova TD and varied as additional cables and splitters were added in a consistent fashion. I didn't see much variation in C/N but I wouldn't expect to in a setup with a masthead amp. Turning the LNA on and off in a PCTV 292e showed that the LNA gives approx 20dB gain. Test environment was this patch, the si2168: Implement own I2C adapter locking patch and Olli Salonen's si2168: add I2C error handling patch as that is needed to make Antti's patch apply cleanly. Adam