Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-ma05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 9E69F38000092; Mon, 21 Jan 2013 17:53:46 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TxPt9-00088q-Re for rs_out_1@blacksheep.org; Mon, 21 Jan 2013 22:30:47 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TxPt9-00088h-6q for rsgb_lf_group@blacksheep.org; Mon, 21 Jan 2013 22:30:47 +0000 Received: from imr-da03.mx.aol.com ([205.188.105.145]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1TxPt6-0004ee-Fd for rsgb_lf_group@blacksheep.org; Mon, 21 Jan 2013 22:30:46 +0000 Received: from mtaout-da01.r1000.mx.aol.com (mtaout-da01.r1000.mx.aol.com [172.29.51.129]) by imr-da03.mx.aol.com (Outbound Mail Relay) with ESMTP id 6D5A81C00012A for ; Mon, 21 Jan 2013 17:30:22 -0500 (EST) Received: from White (nrbg-4d073627.pool.mediaWays.net [77.7.54.39]) by mtaout-da01.r1000.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id 4697FE00008D for ; Mon, 21 Jan 2013 17:30:19 -0500 (EST) Message-ID: From: "Markus Vester" To: References: <8CFC5E9100D3878-19D0-1B385@webmail-d170.sysops.aol.com> <003301cdf802$0243c030$06cb4090$@t-online.de> Date: Mon, 21 Jan 2013 23:30:16 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 12.0.1606 X-MimeOLE: Produced By Microsoft MimeOLE V12.0.1606 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20121107; t=1358807422; bh=mlCpwgKgQJ41CS0QwWheKqgO+HgclbkVEL8hSzrYSGQ=; h=From:To:Subject:Message-ID:Date:MIME-Version:Content-Type; b=wNsKpaKSVrHC3uqSjQ3fC4Y0biCgwW2wVabQAqU5EN8qA3pVXvStydKsw+u6DBfqX byVD/wXgQON6oKDKpslQZFcTUhA+v1eN96EpdXdmOIPPCRwnVAAU6EGEOQrF6qwv5V m17mPVSFQ5qCCvWWzYoxgdhsspJTSlJ6SqRf7NJ4= X-AOL-SCOLL-SCORE: 0:2:472086432:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-Spam-Score: 0.0 (/) 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: Hi Stefan, if you google for "ad9850 ebay" you'll literally find dozens of those modules, most around 5 Euro. Mine came from Shenzhen CN, quick delivery, no problems. Best 73, Markus (DF6NM) [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [205.188.105.145 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 SPF_PASS SPF: sender matches SPF record -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 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: d4b11820086e28e9e085cef3e7768d06 Subject: Re: LF: AW: AD9850 controlled by RS-232 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0034_01CDF82F.452DE740" 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-ma05.r1000.mx.aol.com ; domain : mx.aol.com DKIM : pass x-aol-sid: 3039ac1d600d50fdc6fa7d99 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Dies ist eine mehrteilige Nachricht im MIME-Format. ------=_NextPart_000_0034_01CDF82F.452DE740 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Stefan, if you google for "ad9850 ebay" you'll literally find dozens of those = modules, most around 5 Euro. Mine came from Shenzhen CN, quick delivery, = no problems. Best 73, Markus (DF6NM) From: Stefan Wendler=20 Sent: Monday, January 21, 2013 7:06 PM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: AW: AD9850 controlled by RS-232 Hi Markus, =20 that sounds interesting. Where did you buy the boards? =20 73 Stefan, DL3NSW =20 Von: owner-rsgb_lf_group@blacksheep.org = [mailto:owner-rsgb_lf_group@blacksheep.org] Im Auftrag von Markus Vester Gesendet: Montag, 21. Januar 2013 13:22 An: rsgb_lf_group@blacksheep.org; rsgb_lf_group@yahoogroups.co.uk Betreff: LF: AD9850 controlled by RS-232 =20 I have recently aquired a couple of cheap AD9850 DDS boards, and found = that it is possible to control them directly from the PC through RS-232 = handshake lines (RTS, DTR, TXD) without any additional hardware. This = can be used as a simple means to generate WSPR RF signals without a = linear SSB exciter. =20 Details regarding the boards and interfacing format were found on =20 http://www.theladderline.com/inexpensive-ad9850-dds-boards-ebay#comment-1= 95 =20 Five short wires connect the 9-pin RS232 to the "lower" row on the = AD9850 board, with the 5V supply tapped directly off the USB device. http://df6nm.bplaced.net/wspr/ad9850/ad9850_at_rs232.jpg =20 (*) 5V =3D Vcc (1) (4) rts =3D clock (2) (3) txd =3D latch (3) (7) dtr =3D data (4) (5) gnd =3D reset, gnd (5,6) =20 As the USB-to-Serial converter has only low current outputs, the = internal clamping diodes provide adequate voltage limiting at the = digital inputs. To configure the AD9850 for serial protocol, = additionally pins D0 (2) and D1 (3) on the "upper" row have to be be = connected to Vdd (1), and D2 (4) to gnd (10). =20 I have uploaded software and sourcecode to http://df6nm.bplaced.net/wspr/ad9850/ddswspr.zip (77k) In addition to a basic frequency setting utility (serdds.exe), there is = also a WSPR transmit program (ddswspr.exe) which allows you to generate = WSPR at different speeds. BTW The latter can alternatively be used to = generate wspr with a FE-5680A Rubidium synthesizer (/rb option). =20 As the onboard 125 MHz sources seem to deviate by several kHz it is = useful to calibrate the frequency and edit ddsref.txt. Frequency = stability is adequate but not very good, my units exhibited a warmup = drift of about 2 ppm.=20 =20 Hope this may be useful. =20 Best 73, Markus (DF6NM) ------=_NextPart_000_0034_01CDF82F.452DE740 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Stefan,
 
if you google for "ad9850 ebay" you'll = literally=20 find dozens of those modules, most around 5 Euro. Mine came = from=20 Shenzhen CN, quick delivery, no problems.
 
Best 73,
Markus (DF6NM)

Sent: Monday, January 21, 2013 7:06 PM
Subject: LF: AW: AD9850 controlled by = RS-232

Hi=20 Markus,

 

that=20 sounds interesting.

Where=20 did you buy the boards?

 

73

Stefan,=20 DL3NSW

 

Von: owner-rsgb_lf_group@bl= acksheep.org=20 [mailto:owner-rsgb_lf_group@blacksheep.org] Im Auftrag von Markus = Vester
Gesendet: Montag, 21. Januar 2013 13:22
An: = rsgb_lf_group@blacksheep.org= ; rsgb_lf_group@yahoogroups= .co.uk
Betreff:=20 LF: AD9850 controlled by RS-232

 

I have=20 recently aquired a couple of cheap AD9850 DDS boards, and found that it = is=20 possible to control them directly from the PC through RS-232 handshake = lines=20 (RTS, DTR, TXD) without any additional hardware. This can be used as a = simple=20 means to generate WSPR RF signals without a linear SSB=20 exciter.

 

Details regarding the boards and interfacing format = were=20 found on 
http://www.theladderline.com/inexpensive-ad9850-dds-boards-eb= ay#comment-195

 

Five short wires connect the 9-pin RS232 to the = "lower" row=20 on the AD9850 board, with the 5V supply tapped directly off the USB=20 device.
http://= df6nm.bplaced.net/wspr/ad9850/ad9850_at_rs232.jpg

 

 (*)  5V =3D Vcc   = (1)
 (4) rts =3D=20 clock (2)
 (3) txd =3D latch (3)
 (7) dtr =3D data  = (4)
 (5) gnd =3D reset, gnd (5,6)

 

As the USB-to-Serial converter has only low current = outputs,=20 the internal clamping diodes  provide adequate voltage limiting at = the=20 digital inputs. To configure the AD9850 for serial protocol, = additionally pins=20 D0 (2) and D1 (3) on the "upper" row have to be be connected to Vdd (1), = and D2=20 (4) to gnd (10).

 

I have uploaded software and sourcecode to
http://df6nm.bp= laced.net/wspr/ad9850/ddswspr.zip=20 (77k)

In addition to a basic frequency setting utility=20 (serdds.exe), there is also a WSPR transmit program (ddswspr.exe) which = allows=20 you to generate WSPR at different speeds. BTW The latter can = alternatively be=20 used to generate wspr with a FE-5680A Rubidium synthesizer (/rb=20 option).

 

As the onboard 125 MHz sources seem to deviate by = several kHz=20 it is useful to calibrate the frequency and edit ddsref.txt. Frequency = stability=20 is adequate but not very good, my units exhibited a warmup drift of = about 2 ppm.=20

 

Hope this may be useful.

 

Best 73,
Markus=20 (DF6NM)

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