From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 78212C48BE5 for ; Sat, 12 Jun 2021 21:24:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 402B461059 for ; Sat, 12 Jun 2021 21:24:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229874AbhFLV0I (ORCPT ); Sat, 12 Jun 2021 17:26:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33402 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229753AbhFLV0H (ORCPT ); Sat, 12 Jun 2021 17:26:07 -0400 X-Greylist: delayed 184 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Sat, 12 Jun 2021 14:24:07 PDT Received: from mxd2.seznam.cz (mxd2.seznam.cz [IPv6:2a02:598:2::210]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 717AAC061574 for ; Sat, 12 Jun 2021 14:24:06 -0700 (PDT) Received: from email.seznam.cz by email-smtpc4a.ng.seznam.cz (email-smtpc4a.ng.seznam.cz [10.23.10.105]) id 007bbef8d7c0079d00d3a03f; Sat, 12 Jun 2021 23:24:05 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=post.cz; s=beta; t=1623533045; bh=biO9MiX9+s+3zjObTbD6rPRJ7EVcESPl9t/MHrpInYQ=; h=Received:From:To:Date:MIME-Version:Subject:Message-ID:Priority: In-reply-to:References:X-mailer:Content-type: Content-transfer-encoding:Content-description; b=jZCtBqdestkMTnvwgtX0palu+vYHyDWhfFk1DvgZxgKtB3AZd1kyQBw5JGNdzHJLX ULH7XizaiqNCaVg2CY6vO1Iyw2I5adQd8U2YCTJJw+/RisVb//aMedtWi9+31vcnMS uxlpYra6g6lUq9fYenvVwg+jh1ndH/OAG6Za7kxI= Received: from [192.168.30.118] (47.94.cust.tetanet.cz [109.202.94.47]) by email-relay11.ng.seznam.cz (Seznam SMTPD 1.3.125) with ESMTP; Sat, 12 Jun 2021 23:20:56 +0200 (CEST) From: "Frantisek Rysanek" To: linux-media@vger.kernel.org Date: Sat, 12 Jun 2021 23:20:53 +0200 MIME-Version: 1.0 Subject: Re: Logilink DVB-T2 stick VG0022A Message-ID: <60C52535.20482.128FE994@Frantisek.Rysanek.post.cz> In-reply-to: <20210612084102.u3hvrlfudu3sz3vj@pengutronix.de> References: <20210611144917.26rvhietmpbuuo5p@pengutronix.de>, <20210612084102.u3hvrlfudu3sz3vj@pengutronix.de> X-mailer: Pegasus Mail for Windows (4.73.639) Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Content-description: Mail message body Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Guten Tag Uwe, What does the signal level and CNR look like? Not sure if your TV viewer app can display those stats. The femon plugin in VDR can do it. There are command-line tools that can show these stats: https://linuxtv.org/wiki/index.php/Dvbv5-zap https://linuxtv.org/wiki/index.php/Dvb-fe-tool I am slightly sad that these tools show signal level in %, rather than dBmW or dBuV. In my experience with a single dongle (the T230C2), CNR of 25 dB is barely okay. I've never seen a CNR better than say 38 dB. Frank