Return-Path: Received: from mtain-df11.r1000.mx.aol.com (mtain-df11.r1000.mx.aol.com [172.29.64.223]) by air-me03.mail.aol.com (v129.4) with ESMTP id MAILINME032-8ba94ce9b00fb3; Sun, 21 Nov 2010 18:49:35 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df11.r1000.mx.aol.com (Internet Inbound) with ESMTP id D1CD338000091; Sun, 21 Nov 2010 18:49:33 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PKJdd-00050K-Ly for rs_out_1@blacksheep.org; Sun, 21 Nov 2010 23:48:05 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PKJdd-00050B-1W for rsgb_lf_group@blacksheep.org; Sun, 21 Nov 2010 23:48:05 +0000 Received: from smtp7.freeserve.com ([80.12.242.2] helo=smtp6.freeserve.com) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PKJda-0000FC-QU for rsgb_lf_group@blacksheep.org; Sun, 21 Nov 2010 23:48:05 +0000 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3j02.me.freeserve.com (SMTP Server) with ESMTP id 16E853000095 for ; Mon, 22 Nov 2010 00:47:57 +0100 (CET) Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3j02.me.freeserve.com (SMTP Server) with ESMTP id 0A9B3300009E for ; Mon, 22 Nov 2010 00:47:57 +0100 (CET) Received: from AGB (unknown [91.110.89.83]) by mwinf3j02.me.freeserve.com (SMTP Server) with SMTP id C633E3000095 for ; Mon, 22 Nov 2010 00:47:56 +0100 (CET) X-ME-UUID: 20101121234756811.C633E3000095@mwinf3j02.me.freeserve.com Message-ID: From: "Graham" To: References: <4CE9AA76.1050008@usa.net> In-Reply-To: <4CE9AA76.1050008@usa.net> Date: Sun, 21 Nov 2010 23:47:56 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8089.726 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8089.726 X-Antivirus: avast! (VPS 101121-1, 21/11/2010), Outbound message X-Antivirus-Status: Clean X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: ROS Latest with I/Q output Content-Type: multipart/alternative; boundary="----=_NextPart_000_029F_01CB89D6.854E02C0" 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_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-sid: 3039ac1d40df4ce9b00d7a18 X-AOL-IP: 195.171.43.25 ------=_NextPart_000_029F_01CB89D6.854E02C0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Is there a production version ? NB: All we need now is a HDL module .. Huey Dewey and Louie=20 From: Alberto di Bene=20 Sent: Sunday, November 21, 2010 11:25 PM To: rsgb_lf_group@blacksheep.org=20 Subject: Re: LF: ROS Latest with I/Q output On 11/21/2010 2:41 PM, Andy Talbot wrote:=20 There are plenty of receiver packages for Softrock. clones and simi= lar - now how about more SDR transmitter software. Giuliano I0CG and myself presented a working prototype of such a proje= ct at the Castelfeder (near Bozen, North-East Italy) meeting, last October. The PDF of my presentation is here : http://www.i0cg.com/presentazione_i2phd.pdf=20 Unfortunately it is in Italian, but with some fantasy and guesswork ma= ybe it can be understood. Giuliano is the author of the hardware project, while I wrote the DSP= software for the dsPIC. Synthetically, the audio signal coming from the microphone is digitize= d by the on-board ADC converter of a dsPIC chip at a sampling rate of 15501 Hz, then upsampled to 248,016 Hz, then sent through an= SPI interface to an AD-9957 device, which is dynamically programmed= =20 to provide an SSB output that can range continuously from about zero= up to more than 100 MHz (the final sampling frequency is 250 MHz). It was tested on the air in SSB QSOs with the US on the 20m band, and= received unsolicited comments about the very good quality=20 of the modulation.=20 Some more info on the page of Giuliano : http://www.i0cg.com/ad9957_= dds.htm 73 Alberto I2PHD ------=_NextPart_000_029F_01CB89D6.854E02C0 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable
Is there  a = ;=20 production  version  ?
 
NB:  All = we need now=20 is  a HDL  module ..  Huey  Dewey and=20   Louie

Sent: Sunday, November 21, 2010 11:25 PM
Subject: Re: LF: ROS Latest with I/Q output

On 11/21/2010 2:41 PM, Andy Talbot wrote:=20
There are plenty of receiver packag= es for Softrock. clones=20  and similar - now how about more SDR transmitter=20 software.
Giuliano I0CG and myself presented a working= prototype=20 of such a project at the Castelfeder (near Bozen, North-East Italy)meeting,=20 last October. The PDF of my presentation is here :

http://www.i0cg.com/presentazione_i2phd.pdf=20

Unfortunately it is in Italian, but with some fantasy and gues= swork=20 maybe it can be understood.
Giuliano is the author of the hardware= project,=20 while I wrote the DSP software for the dsPIC.

Synthetically, th= e audio=20 signal coming from the microphone is digitized by the on-board ADC con= verter of=20 a dsPIC chip at a sampling
rate of 15501 Hz, then upsampled to 248,= 016 Hz,=20 then sent through an SPI interface to an AD-9957 device, which is dyna= mically=20 programmed
to provide an SSB output that can range continuously fr= om about=20 zero up to more than 100 MHz (the final sampling frequency is 250=20 MHz).

It was tested on the air in SSB QSOs with the US on the= 20m band,=20 and received unsolicited comments about the very good quality
of= the=20 modulation.

Some more info on the page of Giuliano  :&nbs= p; http://www.i0cg.com/ad9957_dds.htm

73 = =20 Alberto  I2PHD



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