Return-Path: Received: from mtain-de09.r1000.mx.aol.com (mtain-de09.r1000.mx.aol.com [172.29.64.209]) by air-ma02.mail.aol.com (v129.4) with ESMTP id MAILINMA022-b4f44ccbf7a4345; Sat, 30 Oct 2010 06:47:00 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-de09.r1000.mx.aol.com (Internet Inbound) with ESMTP id C05DC38000096; Sat, 30 Oct 2010 06:46:58 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PC8wN-0003Wf-5T for rs_out_1@blacksheep.org; Sat, 30 Oct 2010 11:45:39 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PC8wM-0003WW-M0 for rsgb_lf_group@blacksheep.org; Sat, 30 Oct 2010 11:45:38 +0100 Received: from mail-iw0-f171.google.com ([209.85.214.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PC8wK-0000lg-Iv for rsgb_lf_group@blacksheep.org; Sat, 30 Oct 2010 11:45:38 +0100 Received: by iwn35 with SMTP id 35so1164496iwn.16 for ; Sat, 30 Oct 2010 03:45:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=Zllq3WaSERsgjSN7aSB/WIDRiTAk3APHVPO9ABLcqQY=; b=fQi0jly6bShojxFCnTcw+CWGw0ey/jsz+jHQH7cEFROc3va8zSgduNA+Hovex2wzaE DyZreQLfcGBf+NgyUo/+7/uZc01G7q4YMszMbboVf66VITz7MXl98wjZzl77czY/8xj1 2fqPaQNqLxd3pGDx77Qw0nJiFcNmsyc6Qlu50= 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=OSsPCRIMSQzMjp3Lnc3/6IL+uNgKGMCmncvNCDbOUvhfiKtj4lZVvo9cc1RHI/AHDA SO7vEjMX/8JFGnzNVfuVrqoQsVhN5ABCFM09tNzdeoHdnu6Pr1O/rH8WRCAYN6KBewFI UjMkGzduC5eZ+CBkAiD4GJrZczxtZfYF/wl/Q= MIME-Version: 1.0 Received: by 10.42.136.8 with SMTP id r8mr2143393ict.84.1288435533110; Sat, 30 Oct 2010 03:45:33 -0700 (PDT) Received: by 10.231.79.69 with HTTP; Sat, 30 Oct 2010 03:45:33 -0700 (PDT) In-Reply-To: <040001cb781e$c6a2a150$0201a8c0@Clemens04> References: <4CCAED49.6030007@o2.ie> <040001cb781e$c6a2a150$0201a8c0@Clemens04> Date: Sat, 30 Oct 2010 11:45:33 +0100 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: RFspace SDR-IQ Content-Type: multipart/alternative; boundary=90e6ba6e8be4445cef0493d34625 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,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-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m255.2 ; domain : googlemail.com DKIM : pass x-aol-sid: 3039ac1d40d14ccbf7a2713c X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --90e6ba6e8be4445cef0493d34625 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Oops... What I really meant was I was measuring PN of PLLs, using a crystal oscillator as LO in downconverters. Typing got ahead of thoughts :-) Andy www.g4jnt.com On 30 October 2010 11:39, Clemens Paul wrote: > I believe when you are measuring decent crystal oscillators > with e.g. the SDR-IQ you can not be sure if you meaure its own phase noi= se > (of the clock oscillator) or that of the DUT. > Indeed one can use *very clean* OCXOs to measure the SDR's phase noise. > I've done this with my Perseus using a Wenzel OCXO > (probably the same that Peter Hart uses). > > 73 > Clemens > DL4RAJ > > ----- Original Message ----- > *From:* Andy Talbot > *To:* rsgb_lf_group@blacksheep.org > *Sent:* Friday, October 29, 2010 8:58 PM > *Subject:* Re: LF: RFspace SDR-IQ > > Lovely receiver. > > And just as useful as a piece of test equipment too - I use mine for pha= se > noise measurements of crystal oscillators / PLLs when its not receiving= LF - > HF signals > > Only downside is that it only shows 190kHz spectrum in one go. > > > Andy > www.g4jnt.com > > > On 29 October 2010 16:50, Tony wrote: > >> Hello group. >> >> Has anyone any experience with this SDR ? >> It looks interesting and I'm a bit tempted, especially as it works full >> spec down to 500 Hz and "usable" to 100 Hz. >> But as I have never used an SDR, I haven't got a clue if it's any good= or >> not. >> >> > ------------------------------ > > > Eingehende eMail ist virenfrei. > Von AVG =FCberpr=FCft - www.avg.de > Version: 9.0.864 / Virendatenbank: 271.1.1/3225 - Ausgabedatum: 10/28/10 > 20:34:00 > > --90e6ba6e8be4445cef0493d34625 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Oops...
=A0
What I really meant was I was measuring PN of PLLs, using a crystal= oscillator as LO in =A0downconverters.=A0=A0=A0
Typing got ahead of thoughts :-)
=A0
On 30 October 2010 11:39, Clemens Paul <cpaul@gmx.net> wrote:
I believe when you are measuring dece= nt crystal oscillators
with e.g. the=A0SDR-IQ=A0you can not= be sure if you meaure its own phase noise
(of the clock oscillator) or that of= the DUT.
Indeed one can use *very clean* OCXOs= to measure the SDR's phase noise.
I've done this with my Perseus us= ing a Wenzel OCXO
(probably the same that Peter Hart us= es).
=A0
73
Clemens
DL4RAJ=A0
----- Original Message -----
Sent: Friday, October 29, 2010 8:58= PM
Subject: Re: LF: RFspace SDR-IQ

Lovely receiver.=A0
=A0
And=A0just as useful as a piece of test equipment too - I use mine fo= r phase noise measurements of crystal oscillators=A0/ PLLs=A0when its not= receiving LF - HF=A0signals
=A0
Only downside is that it only shows 190kHz spectrum in one go.
=A0
On 29 October 2010 16:50, Tony <ei8jk@o2.ie>= wrote:
Hello group.

Has anyone= any experience with this SDR ?
It looks interesting and I'm a bit= tempted, especially as it works full spec down to 500 Hz and "usable= " to 100 Hz.
But as I have never used an SDR, I haven't got a clue if it's any= good or not.



Eingehende eMail ist virenfrei.
Von AVG =FCberpr=FCft - www.avg.de
Version:= 9.0.864 / Virendatenbank: 271.1.1/3225 - Ausgabedatum: 10/28/10 20:34:00=


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