Return-Path: Received: (qmail 22760 invoked from network); 25 Sep 2001 07:59:20 -0000 Received: from unknown (HELO warrior-inbound.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 25 Sep 2001 07:59:20 -0000 Received: (qmail 14338 invoked from network); 25 Sep 2001 07:59:04 -0000 Content-Transfer-Encoding: 8bit Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior with SMTP; 25 Sep 2001 07:59:04 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15lmzM-0001VV-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 25 Sep 2001 08:50:44 +0100 X-MSMail-Priority: Normal Received: from relay.dera.gov.uk ([192.5.29.49]) by post.thorcom.com with smtp (Exim 3.16 #2) id 15lmzK-0001VP-00 for rsgb_lf_group@blacksheep.org; Tue, 25 Sep 2001 08:50:42 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: (qmail 24078 invoked from network); 25 Sep 2001 08:50:02 +0100 Received: from trtnmail.dera.gov.uk (146.80.9.56) by relay.dera.gov.uk with SMTP; 25 Sep 2001 08:50:02 +0100 Received: (qmail 13355 invoked from network); 25 Sep 2001 08:55:08 +0100 Received: (ofmipd 192.5.29.90); 25 Sep 2001 07:54:46 -0000 Received: by bob.dera.gov.uk; (8.8.8/1.3/10May95) id IAA31723; Tue, 25 Sep 2001 08:57:12 +0100 (BST) Received: (qmail 14066 invoked from network); 25 Sep 2001 08:39:11 -0000 Received: from gauntlet.mail.dera.gov.uk (172.16.9.10) by baton.dera.gov.uk with SMTP; 25 Sep 2001 08:39:10 -0000 Received: by gauntlet.mail.dera.gov.uk; id IAA19210; Tue, 25 Sep 2001 08:22:14 GMT Received: from unknown(10.71.64.31) by gauntlet.mail.dera.gov.uk via smap (3.2) id xma019178; Tue, 25 Sep 01 08:22:03 GMT Received: from mailex.dera.gov.uk (unverified) by mailguard.dera.gov.uk (Content Technologies SMTPRS 4.1.5) with SMTP id for ; Tue, 25 Sep 2001 08:51:57 +0100 Received: (qmail 27197 invoked from network); 25 Sep 2001 07:35:55 +0100 Date: 25 Sep 2001 08:48:55 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D55C5C4@PDW-MAIL-R1> From: "Andrew Talbot" To: rsgb_lf_group@blacksheep.org X-5Received: from softdnserror (HELO cchecker.dstl.gov.uk) (192.168.248.52) by mailex.dstl.gov.uk with SMTP; 25 Sep 2001 06:35:55 -0000 X-4Received: from FRN-MAIL-R3.dstl.gov.uk (unverified) by cchecker.dstl.gov.uk (Content Technologies SMTPRS 4.1.2) with ESMTP id for ; Tue, 25 Sep 2001 07:35:09 +0100 X-3Received: by frn-mail-r3.dstl.gov.uk with Internet Mail Service (5.5.2650.21)id ; Tue, 25 Sep 2001 08:49:00 +0100 Subject: LF: RE: Re: Re: IC-706 on LF MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2650.21) Content-Type: text/plain; charset=iso-8859-1; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >>From Alan G3NYK > us lesser mortals it is barely adequate. I was also quite taken aback by the > "chunder" that could be heard with no signal at 136k, this is probably the > PLL reference. It is something I do not hear on the 7030 (even at the 10nV > level) despite DDS LOs not being famed for their quietness. DDS LOs are extremally quiet - there is no added phase noise due to the synthesizer process and the phase noise you do get is that of the clock divided by the frequency synthesis ratio. There can be spurious frequency products at well defined levels, but they can usually be dealt with by filtering and proper frequency planning. You are probably thinking of PLL synthesizer phase noise Andy G4JNT -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful.