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[77.248.65.57]) by mx.google.com with ESMTPS id n2sm28069763wiy.6.2013.02.19.13.55.08 (version=TLSv1 cipher=RC4-SHA bits=128/128); Tue, 19 Feb 2013 13:55:16 -0800 (PST) Message-ID: From: Minto Witteveen To: References: <66C750703EBB402183CD055EB3EFA9D1@AGB> In-Reply-To: <66C750703EBB402183CD055EB3EFA9D1@AGB> Date: Tue, 19 Feb 2013 22:55:08 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 X-Spam-Score: -0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Yes I am curious too.. I already found out that an FSK shift of 0.1746 Hz instead of 0.1831 (-4.6%) poses no problem. Also my AD9850 DDS board will creep between 0,5 and 1 Hz during a 15 minute TX period (slowly getting higher in frequency due to the TX heating up a bit). Does not seem to bother the RX software. [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [74.125.82.50 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (minto.witteveen[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: ead411ce91f9601ce3974c7575797436 Subject: Re: LF: wspr-15 frequency tolerance Content-Type: multipart/alternative; boundary="----=_NextPart_000_007C_01CE0EF4.2A291E70" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_50_60,HTML_MESSAGE, MISSING_OUTLOOK_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G X-AOL-SCOLL-AUTHENTICATION: mtain-dc01.r1000.mx.aol.com ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d40815123fb3540f1 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_007C_01CE0EF4.2A291E70 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Yes I am curious too.. I already found out that an FSK shift of 0.1746 Hz instead of 0.1831 = (-4.6%) poses no problem. Also my AD9850 DDS board will creep between 0,5 and 1 Hz during a 15 = minute TX period (slowly getting higher in frequency due to the TX = heating up a bit). Does not seem to bother the RX software. Minto pa3bca -------------------------------------------------------------------------= - Ceterum censeo Carthaginem delendam esse From: Graham=20 Sent: Tuesday, February 19, 2013 22:41 To: rsgb_lf_group@blacksheep.org=20 Subject: LF: wspr-15 frequency tolerance=20 Anyone a clue as to the limits of wspr-15 frequency tolerance = ? short / long term drift / jitter in the 15 min cycle ? Tnx -G.. ------=_NextPart_000_007C_01CE0EF4.2A291E70 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Yes I am curious too..
I already found out that an FSK = shift of=20 0.1746 Hz instead of 0.1831 (-4.6%) poses no problem.
Also my AD9850 = DDS=20 board will creep between 0,5 and 1 Hz during a 15 minute TX period = (slowly=20 getting higher in frequency due to the TX heating up a bit).  Does not seem to bother the RX = software.

Minto pa3bca

 
-------------------------------------------------------------------= -------
Ceterum=20 censeo Carthaginem delendam esse
 
From: Graham
Sent: Tuesday, February 19, 2013 22:41
Subject: LF: wspr-15 frequency tolerance
 
Anyone  a  clue as  to the  limits =20 of    wspr-15   frequency tolerance ?
short / long  term  drift   / jitter  in = the =20 15 min  cycle ?
 
Tnx -G..
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