Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-ma03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 353DF380000B8; Mon, 21 Jan 2013 13:38:47 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1TxLlk-00061T-Vz for rs_out_1@blacksheep.org; Mon, 21 Jan 2013 18:06:52 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1TxLlk-00061K-EG for rsgb_lf_group@blacksheep.org; Mon, 21 Jan 2013 18:06:52 +0000 Received: from mailout06.t-online.de ([194.25.134.19]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1TxLlg-0003vx-Gy for rsgb_lf_group@blacksheep.org; Mon, 21 Jan 2013 18:06:51 +0000 Received: from fwd04.aul.t-online.de (fwd04.aul.t-online.de ) by mailout06.t-online.de with smtp id 1TxLlK-0002z1-7h; Mon, 21 Jan 2013 19:06:26 +0100 Received: from STEFANNR7 (E45nl0Zd8hdKEaKtMrOTV5GmqwW1BhldtR6L8bKuQi+PKdbP9tPwnLtutPXYiPkQYv@[87.182.220.167]) by fwd04.t-online.de with esmtp id 1TxLlC-2JtFhY0; Mon, 21 Jan 2013 19:06:18 +0100 From: "Stefan Wendler" To: References: <8CFC5E9100D3878-19D0-1B385@webmail-d170.sysops.aol.com> In-Reply-To: <8CFC5E9100D3878-19D0-1B385@webmail-d170.sysops.aol.com> Date: Mon, 21 Jan 2013 19:06:16 +0100 Message-ID: <003301cdf802$0243c030$06cb4090$@t-online.de> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQIh/lorR3lO6cMC3bjZCPweZz/Q3ZesBwbg Content-Language: de X-ID: E45nl0Zd8hdKEaKtMrOTV5GmqwW1BhldtR6L8bKuQi+PKdbP9tPwnLtutPXYiPkQYv X-TOI-MSGID: ec00d389-cad9-483e-b2e1-6a689fa8efe3 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 Markus, that sounds interesting. Where did you buy the boards? [...] 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 [194.25.134.19 listed in list.dnswl.org] -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-Scan-Signature: 9d611a03c0c7539fa2f53ebf8cdeb3a5 Subject: LF: AW: AD9850 controlled by RS-232 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0034_01CDF80A.6408EB80" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_40_50,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: 3039ac1d600b50fd8b366081 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multipart message in MIME format. ------=_NextPart_000_0034_01CDF80A.6408EB80 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi Markus, that sounds interesting. Where did you buy the boards? 73 Stefan, DL3NSW 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 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. Details regarding the boards and interfacing format were found on http://www.theladderline.com/inexpensive-ad9850-dds-boards-ebay#comment-195 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 (*) 5V = Vcc (1) (4) rts = clock (2) (3) txd = latch (3) (7) dtr = data (4) (5) gnd = reset, gnd (5,6) 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). 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). 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. Hope this may be useful. Best 73, Markus (DF6NM) ------=_NextPart_000_0034_01CDF80A.6408EB80 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Markus,

 

that sounds interesting.

Where did you buy the boards?

 

73

Stefan, DL3NSW

 

Von:<= /b> = 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

 

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.

 

Details regarding the boards and interfacing format = were 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 on the AD9850 board, with the 5V supply tapped = directly off the USB device.
http://= df6nm.bplaced.net/wspr/ad9850/ad9850_at_rs232.jpg

 

 (*)  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)

 

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).

 

I = have uploaded software and sourcecode to
http://df6nm.bp= laced.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).

 

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.

 

Hope this may be useful.

 

Best 73,
Markus = (DF6NM)

------=_NextPart_000_0034_01CDF80A.6408EB80--