Return-Path: Received: (qmail 15459 invoked from network); 23 Jan 2001 22:33:52 -0000 Received: from unknown (HELO warrior-inbound.servers.plus.net) (212.159.14.227) by 10.226.25.101 with SMTP; 23 Jan 2001 22:33:52 -0000 Received: (qmail 4302 invoked from network); 23 Jan 2001 22:37:23 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 23 Jan 2001 22:37:23 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.16 #1) id 14LByu-0003Hn-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 23 Jan 2001 22:32:04 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from d12lmsgate.de.ibm.com ([195.212.91.199]) by post.thorcom.com with esmtp (Exim 3.16 #1) id 14LByt-0003Hi-00 for rsgb_lf_group@blacksheep.org; Tue, 23 Jan 2001 22:32:03 +0000 Received: from d12relay02.de.ibm.com (d12relay02.de.ibm.com [9.165.215.23]) by d12lmsgate.de.ibm.com (1.0.0) with ESMTP id XAA52604 for ; Tue, 23 Jan 2001 23:31:19 +0100 Received: from usa.net (ss9.bld.socks.ibm.com [9.14.4.75] (may be forged)) by d12relay02.de.ibm.com (8.8.8m3/NCO v4.95) with ESMTP id XAA124780 for ; Tue, 23 Jan 2001 23:31:17 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3A6E05E3.6BC53912@usa.net> Date: Tue, 23 Jan 2001 23:29:55 +0100 From: "Alberto di Bene" Organization: Undisclosed X-Mailer: Mozilla 4.76 [en] (Win95; U) X-Accept-Language: en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Sound Card Accuracy References: <200101222330.VAA19729@mozart.unetsul.com.br> <3A6D9131.93205719@usa.net> <011901c0856b$e3dbc680$520a0805@globocabo.com.br> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: PY3CRX PY2PLL wrote: > [snip] > This 11.024XXX divided by 2 is the "corrected clock value" that JVComm32 > needs to print a straight vertical line when in HF-FAX mode , 60 lines per > minute. It's not some measured reference value. > [snip] > Hello Marcus, ok, understood. > = Argo measured 802,25 Hz - don't remember the decimal portion > = Freq Counter measured 798.8 <> 801.6 - alternating > = Spectran 127 , 8KHz sampling rate, needed -6.7Hz offset to show 800.0 Hz > When using Spectran, change the sampling frequency within the Spectran Controls panel to 11025. 8000 Hz is a value that many sound cards do not implement correctly > Question: the modulating tones used by WWV HF signal are accurate? How much? > The carrier certainly is quite accurate, but I cannot quote any figure. Perhaps you could find some info at their Web site : http://www.bldrdoc.gov/timefreq/stations/wwvb.htm > > 73 > Marcus 73 Alberto I2PHD