Return-Path: Received: from mtain-ma12.r1000.mx.aol.com (mtain-ma12.r1000.mx.aol.com [172.29.96.20]) by air-ma03.mail.aol.com (v126.13) with ESMTP id MAILINMA032-b5114b58d59a229; Thu, 21 Jan 2010 17:30:50 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-ma12.r1000.mx.aol.com (Internet Inbound) with ESMTP id 6AF53380000F6; Thu, 21 Jan 2010 17:30:48 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NY5X9-0008Ln-Hj for rs_out_1@blacksheep.org; Thu, 21 Jan 2010 22:29:47 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NY5X8-0008Le-T5 for rsgb_lf_group@blacksheep.org; Thu, 21 Jan 2010 22:29:46 +0000 Received: from mail-fx0-f217.google.com ([209.85.220.217]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NY5X6-0000sP-8P for rsgb_lf_group@blacksheep.org; Thu, 21 Jan 2010 22:29:46 +0000 Received: by fxm9 with SMTP id 9so593325fxm.30 for ; Thu, 21 Jan 2010 14:29:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=SGu/dorQMeoxZB/4rVkUfcY3bnMwTRoQNbiKGdSa2Eo=; b=G2HpAeh+++ykRRPTZkrWjgFlQGdg062CEMMXlkpA6anfO6nq8pRpQj+4WDwFM8UFqe TbJ4rjbYOGxZpOqGsGOZkxv4ERJrP2Acy9+uDBc832y9QgjTSJFFH+KmPYR4vhQhHxFL LJ2PqFWV+6L3VPnafDcdvL3wa6yb6ViONdA18= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=FBZVGR8nlM2nhv43SzD/OqbXPYlQZ+u5ddtxe6r8dTGy8hWY/dikf+X3+bRpwQIVHX 0h1ttUFr9G2MHmvUndSOHqHKClsIIhWS+9uEy8dBmIzjH9rdmMEQG7Fe9IS/wy7ORVrE DL+VZiUESZTDYrqaLFp8eDaD214Wnli9Iwx9Y= MIME-Version: 1.0 Received: by 10.239.137.199 with SMTP id m7mr225354hbm.95.1264112978222; Thu, 21 Jan 2010 14:29:38 -0800 (PST) In-Reply-To: <1f0624b91001211410t4aa2363au5f926674702f514f@mail.gmail.com> References: <1f0624b91001211103t1d10c850t4577a5dc7f0bde62@mail.gmail.com> <1f0624b91001211310g2ba4828bv40ecc6879a617ae7@mail.gmail.com> <1f0624b91001211345l515b4eabm1e33b2b6c27143af@mail.gmail.com> <1f0624b91001211410t4aa2363au5f926674702f514f@mail.gmail.com> Date: Thu, 21 Jan 2010 22:29:38 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org X-Karma: unknown: DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: 500 kHz WSJT JT4A Content-Type: multipart/alternative; boundary=001485f44f3a05de32047db43dfb X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40, HTML_FONTCOLOR_UNSAFE,HTML_MESSAGE 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-sid: 3039ac1d60144b58d5983e2a X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --001485f44f3a05de32047db43dfb Content-Type: text/plain; charset=ISO-8859-1 Ah... I wonder. Jim's DT setting for your sigs is around +2 seconds. Which means in the opposite direction it would be -2s. This is a bit marginal. The WSJT modes were designed originally for EME, and I *think* the acceptable time window is assymetric, being around 2s negative and up to 6s positive to allow for the EME delay. But if you're decoding JT65A on HF all OK, not too sure - depends if it has the same time-search margin. Would have thought it does. Unless Jim's timing is out.....? Just a thought. WSPR is probably more tolerant of timing and it certainly doesn't need to be assymetric in its search. Andy www.g4jnt.com 2010/1/21 Gary - G4WGT > OK Andy, > > Any suggestion is welcome but yes I do have it set for JT4A, I am currently > on 80m decoding fine with JT65A. > > Looked at the Rate in & out in setup/options & are both set for 1, the rate > shown at the bottom left is usually very close to 1.0003. I would say that > is OK. > > I will try again tomorrow. > > Thanks again. > > Gary - G4WGT. > > 2010/1/21 Andy Talbot > >> may be egg-sucking-lecture, but you have got JT4A set haven't you?. Not >> B...G. >> >> Andy >> www.g4jnt.com >> >> 2010/1/21 Gary - G4WGT >> >>> Andy, >>> >>> You wrote :- >>> Watch & check your sampling rate calibration. for this mode. >>> >>> Is that displayed in the box at the bottom left, if so then it is always >>> within the recommended figures. I read in the user guide to watch those >>> figures for stability & I have never seen it go outside the range specified >>> in the manual. >>> >>> There is an "Enable Diagnostics" in the setup menu but no description in >>> the use guide (WSJT6), it must be an addition in 7.03 but not documented. Is >>> that of any help to me? >>> >>> 73 >>> >>> Gary - G4WGT. >>> >>> >>> 2010/1/21 Andy Talbot >>> >>> Watch & check your sampling rate calibration. for this mode. >>>> >>>> Andy >>>> www.g4jnt.com >>>> >>>> This email has been scanned for damaging side-effects by the health and >>>> safety police, is guaranteed to contain no substances hazardous to health, >>>> but may contribute to dissolving the nether and polar regions >>>> >>>> >>>> 2010/1/21 Gary - G4WGT >>>> >>>>> LF, >>>>> >>>>> Station calling about 503.670 kHz but no decode. Not sure why :-(( >>>>> >>>>> Gary - G4WGT. >>>>> >>>>> >>>>> >>>>> 2010/1/21 Gary - G4WGT >>>>> >>>>>> LF, >>>>>> >>>>>> I am currently transmitting a WSJT JT4A test signal on 503.600 kHz at >>>>>> each even minute, the ERP is estimated at 200 mW. >>>>>> >>>>>> In a while I will change the message to a CQ call & watch for any JT4A >>>>>> replies. >>>>>> >>>>>> 73, >>>>>> >>>>>> Gary - G4WGT. >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>> >>> >> > --001485f44f3a05de32047db43dfb Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Ah...
I wonder.
=A0
Jim's DT setting for your sigs =A0is around +2 seconds.=A0=A0 Whi= ch means in the opposite direction it would be -2s.=A0=A0 This is a bit ma= rginal.=A0=A0 The WSJT modes were designed originally for EME, and I t= hink the acceptable time window is assymetric, being around 2s=A0nega= tive and up to 6s positive to allow for the=A0EME delay.
=A0
But if you're decoding JT65A on HF all OK, not too sure - depends= if it has the same time-search margin.=A0 Would have thought it does.=A0= =A0 Unless Jim's timing is out.....?
=A0
Just a thought.=A0=A0 WSPR is probably more tolerant of timing and it= certainly doesn't need to be assymetric in its search.
2010/1/21 Gary - G4WGT <g4wgt@tiscali.co.uk>
OK Andy,=20

Any suggestion is welcome but yes I do have it set for JT4A, I am cur= rently on 80m decoding fine with JT65A.

Looked at the Rate in & out in setup/options & are both set= for 1, the rate shown at the bottom left is usually very close to 1.0003.= I would say that is OK.

I will try again tomorrow.

Thanks again.

Gary - G4WGT.

2010/1/21 Andy Talbot <andy.g4jnt@go= oglemail.com>
may be egg-sucking-lecture, but you have got JT4A set haven't you= ?.=A0 Not B...G.
2010/1/21 Gary - G4WGT <g4wgt@tiscali.co.uk= >
Andy,=20

You wrote :-
Watch & check your sampling rate calibration. for this mode.

Is that displayed in the box at the bottom left, if so then it is alw= ays within the recommended figures. I read in the user guide to watch thos= e figures for stability & I have never seen it go outside the range sp= ecified in the manual.

There is an "Enable Diagnostics" in the setup menu but no= description in the use guide (WSJT6), it must be an addition in 7.03 but= not documented. Is that of any help to me?

73

Gary - G4WGT.


2010/1/21 Andy Talbot <andy.g4jnt@go= oglemail.com>=20

Watch & check your sampling rate calibration. for this mode.

Andy
www.g4jnt.com

This email has been scanned for damaging= side-effects by the health and safety police, is guaranteed to contain no= substances hazardous to health, but may contribute to dissolving the neth= er and polar regions


2010/1/21 Gary - G4WGT <g4wgt@tiscali.co.uk= >
LF,=20

Station calling about 503.670 kHz but no decode. Not sure why :-((

Gary - G4WGT.



2010/1/21 Gary - G4WGT <g4wgt@tiscali.co.uk= >
LF,=20

I am currently transmitting a WSJT JT4A test signal on 503.600 kHz at= each even minute, the ERP is estimated at 200 mW.

In a while I will change the message to a CQ call & watch for any= JT4A replies.

73,

Gary - G4WGT.









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