From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ralf Baechle DL5RB Subject: Re: Norm Frequency beacon ? Date: Thu, 27 May 2004 15:05:14 +0200 Sender: linux-hams-owner@vger.kernel.org Message-ID: <20040527130514.GB1166@linux-mips.org> References: <200405271330.25402.dl4mge@darc.de> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <200405271330.25402.dl4mge@darc.de> List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: G?nther Montag Cc: linux hams news group , -HFTERMHACKERS- On Thu, May 27, 2004 at 01:30:25PM +0200, G?nther Montag wrote: > does someone know, is there something lik a beacon on the air on shortwave or > medium wave, ham or radio band, which sends a known fixed exact frequency > tone in AM, e.g. 1000 Hz or other, for calibration?` > Something like DCF77 on longwave? > > We have a real-time pactor program which needs an exact frequency for > calibration, and not everyone has an DCF77 receiver. A few shortwave stations among them DW have a reputation for a highly accurate carrier frequency. There are also the usual time stations such as WWV on shortwave. Within Germany ZDF's signal makes a good timebase; a few years ago description how to build a highly accurate frequency normal based on this signal have been published. 73 de DL5RB op Ralf -- Loc. JN47BS / CQ 14 / ITU 28 / DOK A21