Return-Path: X-Spam-DCC: paranoid 1481; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_30_40,HTML_MESSAGE,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u9D6bg79024752 for ; Thu, 13 Oct 2016 08:37:43 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1buZZx-0008J3-Ud for rs_out_1@blacksheep.org; Thu, 13 Oct 2016 07:33:21 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1buZZx-0008Iu-AB for rsgb_lf_group@blacksheep.org; Thu, 13 Oct 2016 07:33:21 +0100 Received: from mail-lf0-x229.google.com ([2a00:1450:4010:c07::229]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1buZZt-0004vc-S7 for rsgb_lf_group@blacksheep.org; Thu, 13 Oct 2016 07:33:20 +0100 Received: by mail-lf0-x229.google.com with SMTP id l131so84032362lfl.2 for ; Wed, 12 Oct 2016 23:33:17 -0700 (PDT) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:from:date:message-id:subject:to; bh=v3QJpGn7ATPGZjD1KO6tqLhAFifT/52kzaXOYJBJwWk=; b=OfVG1i2LqPUmaxl2qJfxLzb6m0Rw+DtSUoxAsei4KpVij/BRlDf01qjx1mL9o3UhGh hCoAdcM8CZdCGROQEWqZgIdJ7yX+BkovO48B3ftJwr6CGpZuQ1sUtZw7frybNFIJQEOJ Z8FsOSd0x1Z7ZRRDlVPaq2eai60XAupMnRLGmwkRaUWxU+C96fdFynD37B8qn27Ev/1I Y/Xde8yhE9xw7dkoGzQVI1rt7gEjPLSyjt1aL37Ng0KzOnU2UbirOn3dgAejIqNNJ2ZN cGJ9qpV/Y63ROmb4+CRw3lbXEzKDeJsPN8JpNPIfkSxR0jYCHsl2BitZg8RUSaLVc3lL KV1Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to; bh=v3QJpGn7ATPGZjD1KO6tqLhAFifT/52kzaXOYJBJwWk=; b=eO7lpSQqD2TsE7LOSabdtbqx3yrDJbtuZfOUpnzIY5D/pZRBlPVMyPAjdjoyEc9fe4 YB7r6eyjSyWcV1grvgKlUxhJnSRL7QKsHKk6Fr6IAHcCCN8zdLXfYwYuMi6qEqBEim8M IPRI4OGGrZbS1MT8qXWAAfm8Rh46iFIJIBynJOXKXx8145GpORvmFd1BtP2wJavm3z02 zZ9FkEXLngFmnMONpZc9JECp4hdiYpQo0FS6PQqyin+rX7Ht5hDbuz6K8jpsQT5huFuh UeDrcxN+R9DjQA2I2sAAYPnAM9DMMJEknKNB424kAL7MPb0Gx/nlJkxaBwg2ji6AfVBj rNmA== X-Gm-Message-State: AA6/9RmMkHJevUw+68mU25+cCRI+6rtYH42F76V7cGb4OQKTKzoHeU7ECw1DAox05gLmF81Y8GwlHk4aBaZtOg== X-Received: by 10.25.5.205 with SMTP id 196mr6737225lff.59.1476340394485; Wed, 12 Oct 2016 23:33:14 -0700 (PDT) MIME-Version: 1.0 Received: by 10.25.141.80 with HTTP; Wed, 12 Oct 2016 23:33:13 -0700 (PDT) In-Reply-To: References: <1585067730.20161012155231@chriswilson.tv> From: Andy Talbot Date: Thu, 13 Oct 2016 07:33:13 +0100 Message-ID: To: rsgb_lf_group@blacksheep.org X-Scan-Signature: b42857a5fad6e32377447282c21f62b1 Subject: Re: LF: Running 2 WSPR transmissions, how to stop them TX'ing at the same time?? Content-Type: multipart/alternative; boundary=001a113e9c16c7ec88053eb948ef 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.11 Content-Length: 7264 Status: O X-Status: X-Keywords: X-UID: 9062 --001a113e9c16c7ec88053eb948ef Content-Type: text/plain; charset=UTF-8 Correct. I have a PIC that reads timing data from a GPS and at the right timing uses a set of pre-stored WSPR symbols to calculate the frequencies for the tones and sends the resulting data to an AD9852 DDS. Different symbol sets (for the two messages) and frequency data is stored for each of the two modes. A pseudo random (PN) sequence that repeats every 30 with enough '1's placed in it to give the desired duty cycle is used to decide the Tx pattern, to decide if a transmission of either type will occur in a particular slot. The same PN sequence is used for -2 and -15 modes, although different repeat squences and different lengths could just have easily been implemented for each mode. At every two minute slot as read from the GPS timing data, and assuming a -15 is not currently underway, the position in the pattern is examined to see if a -2 transmission should start. Similarly, at every 15 minute slot if a -2 transmission is not underway, the position in the -15 pattern decides if that starts. Although both -2 and -15 transmissions use the same PN sequence, they are stepped though based on the results from stepping theough the other and a semi-chaotic combination results giving a pretty random combination of -2 and -15 transmissions with the correct duty cycle on each. The only contention is at :00 and :30 minutes if both are scheduled to Tx, in which case -15 mode dominates. The DDS output feeds the 700 Watt switchmode transmitter which has been would back to a rather benign 500 watts for these overnight transmissions. Andy G4JNT On 12 October 2016 at 22:32, Graham wrote: > Chris , > > I suspect , Andy is running a pic based generator, in which, the Tx / > mode-change is under software control > > Its possible to run as many modes as you like at the same time , just > need the Tx bandwidth and a linear path , otherwise , they need to be in > sequence > > 73-G, > > -------------------------------------------------- > From: "Chris Wilson" > Sent: Wednesday, October 12, 2016 3:52 PM > To: > Subject: LF: Running 2 WSPR transmissions, how to stop them TX'ing at the > same time?? > > 12 October 2016 >> >> >> OK, I am seeing Andy Talbot's WSPR2 and WSPR15 signals by running >> WSPR2 RX on the latest WSJT-X and WSPR15 on WSPR-X. But if I set each >> to also TX how can I be sure they won't both try and TX at the same >> time? Probably something simple, but best to ask! :) Thanks. >> >> >> >> -- >> >> >> Best regards, >> Chris 2E0ILY mailto:chris@chriswilson.tv >> >> My part time LF grabber is at >> http://www.chriswilson.tv/grabber.html >> >> >> > --001a113e9c16c7ec88053eb948ef Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable

Correct.=C2=A0=C2=A0 I have a PIC that reads timing dat= a from a GPS and at the right timing uses a set of pre-stored WSPR symbols = to calculate the frequencies for the tones and sends the resulting data to = an AD9852 DDS.=C2=A0 Different symbol sets (for the two messages) and frequ= ency data is stored for each of the two modes.

A pseudo random (PN) s= equence that repeats every 30 with enough '1's placed in it to give= the desired duty cycle is used to decide the Tx pattern, to decide if a tr= ansmission of either type will occur in a particular slot.=C2=A0 The same P= N sequence is used for -2 and -15 modes, although different repeat squences= and different lengths could just have easily been implemented for each mod= e.

At every two minute slot as read from the GPS timing data, and ass= uming a -15 is not currently underway,=C2=A0 the position in the pattern is= examined to see if a -2 transmission should start.=C2=A0=C2=A0 Similarly, = at every 15 minute slot if a -2 transmission is not underway, the position = in the -15 pattern decides if that starts.

Although both -2 and -15 t= ransmissions use the same PN sequence, they are stepped though based on the= results from stepping theough the other and a semi-chaotic combination res= ults giving a pretty random combination of -2 and -15 transmissions with th= e correct duty cycle on each.=C2=A0=C2=A0=C2=A0 The only contention is at := 00 and :30 minutes if both are scheduled to Tx, in which case=C2=A0 -15 mod= e dominates.

The DDS output feeds the 700 Watt switchmode transmitt= er which has been would back to a rather benign 500 watts for these overnig= ht transmissions.

Andy G4JNT

On 12 October 2016 at 22:32, Grah= am <g8fzk@g8fzk.fsnet.co.uk> wrote:
Chris ,

I suspect , Andy is=C2=A0 running a=C2=A0 pic based=C2=A0 generator, in whi= ch, the=C2=A0 Tx / mode-change is under software control

Its possible to run as=C2=A0 many modes as you like at the=C2=A0 same time = ,=C2=A0 just need the=C2=A0 Tx bandwidth and a linear path , otherwise , th= ey need to be=C2=A0 in sequence

73-G,

--------------------------------------------------
From: "Chris Wilson" <chris@chriswilson.tv>
Sent: Wednesday, October 12, 2016 3:52 PM
To: <r= sgb_lf_group@blacksheep.org>
Subject: LF: Running 2 WSPR transmissions, how to stop them TX'ing at t= he same time??

12 October 2016


OK,=C2=A0 I=C2=A0 am=C2=A0 seeing=C2=A0 Andy=C2=A0 Talbot's WSPR2 and W= SPR15 signals by running
WSPR2=C2=A0 RX=C2=A0 on the latest WSJT-X and WSPR15 on WSPR-X. But if I se= t each
to=C2=A0 also=C2=A0 TX=C2=A0 how can I be sure they won't both try and = TX at the same
time? Probably something simple, but best to ask! :) Thanks.



--


Best regards,
Chris=C2=A0 2E0ILY=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 = =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0mailto:chris@chriswilson.tv

My=C2=A0 =C2=A0 =C2=A0 =C2=A0 part=C2=A0 =C2=A0 =C2=A0 =C2=A0 time=C2=A0 = =C2=A0 =C2=A0 =C2=A0 LF=C2=A0 =C2=A0 =C2=A0 =C2=A0 grabber=C2=A0 =C2=A0 =C2= =A0 =C2=A0is=C2=A0 =C2=A0 =C2=A0 =C2=A0at
http://www.chriswilson.tv/grabber.html




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