X-GM-THRID: 1229918505834081455 X-Gmail-Labels: rsgb lf Delivered-To: daveyxm@gmail.com Received: by 10.115.73.3 with SMTP id a3cs591472wal; Sat, 3 Mar 2007 09:08:14 -0800 (PST) Received: by 10.67.98.9 with SMTP id a9mr5912124ugm.1172941690445; Sat, 03 Mar 2007 09:08:10 -0800 (PST) Return-Path: Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mx.google.com with ESMTP id w40si3690863ugc.2007.03.03.09.08.09; Sat, 03 Mar 2007 09:08:10 -0800 (PST) Received-SPF: neutral (google.com: 193.82.116.20 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1HNXf0-00089F-B0 for rs_out_1@blacksheep.org; Sat, 03 Mar 2007 17:04:42 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1HNXez-000892-C7 for rsgb_lf_group@blacksheep.org; Sat, 03 Mar 2007 17:04:41 +0000 Received: from msgmmp-4.gci.net ([209.165.130.14]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1HNXev-0003iy-2n for rsgb_lf_group@blacksheep.org; Sat, 03 Mar 2007 17:04:41 +0000 Received: from HomeOffice ([66.223.170.208]) by msgmmp-1.gci.net (Sun Java System Messaging Server 6.2-3.03 (built Jun 27 2005)) with ESMTP id <0JEC000LJ7FC6LC0@msgmmp-1.gci.net> for rsgb_lf_group@blacksheep.org; Sat, 03 Mar 2007 08:04:25 -0900 (AKST) Date: Sat, 03 Mar 2007 08:04:24 -0900 From: Roger Brown In-reply-to: <88d2415e0703030533j3db9326fi8fde0da1f9376aaa@mail.gmail.com> To: rsgb_lf_group@blacksheep.org Message-id: <0JEC000LK7FD6LC0@msgmmp-1.gci.net> MIME-version: 1.0 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Mailer: Microsoft Office Outlook, Build 11.0.5510 Thread-index: AcddmQZG1N7HhtbXREGyT7DGMy8XugAGrzUg X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: RE: Frequency Content-type: multipart/alternative; boundary="Boundary_(ID_cEr09wyeTy7WUg4nMzckIQ)" 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_FONTCOLOR_UNKNOWN,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 Status: O X-Status: X-Keywords: X-UID: 3293 This is a multi-part message in MIME format. --Boundary_(ID_cEr09wyeTy7WUg4nMzckIQ) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT Looks like "one times 10 to the ninth" which equals 1000 megahertz (1 GHz). 1 Mhz would be "one times 10 to the sixth." It is scientific notation as used in mathematics. When electronic calculators came into use they came up with a new notation system for scientific notation which was more compatible with calculator. That's where the 1E9 comes from (actually, the "E" stands for Engineering notation which is expressed in multiples of three - i.e., -12, -9, -6, -3, 0, 3, 6, 9, 12, which engineers use. They relate to the more usually used units, Kilo, Mega, Micro, etc.) In the old days it would have been written 1 X 10^9, and actually, that is a change from the way you would write it by hand. With computer keyboards - the method is to indicate a superscript 9 (raised to the power of 9) is by preceding the number with a carrot symbol. Roger, KL7Q _____ From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of lawrence mayhead Sent: Saturday, March 03, 2007 04:33 To: rsgb Subject: LF: Frequency Can anyone help with explanation of following terminology for frequency:- example 1e9 is this 1Mhz? 73 Laurie. --Boundary_(ID_cEr09wyeTy7WUg4nMzckIQ) Content-type: text/html; charset=us-ascii Content-transfer-encoding: 7BIT

Looks like “one times 10 to the ninth” which equals 1000 megahertz (1 GHz). 1 Mhz would be “one times 10 to the sixth.” It is scientific notation as used in mathematics. When electronic calculators came into use they came up with a new notation system for scientific notation which was more compatible with calculator. That’s where the 1E9 comes from (actually, the “E” stands for Engineering notation which is expressed in multiples of three – i.e., -12, -9, -6, -3, 0, 3, 6, 9, 12, which engineers use. They relate to the more usually used units, Kilo, Mega, Micro, etc.) In the old days it would have been written 1 X 10^9, and actually, that is a change from the way you would write it by hand. With computer keyboards – the method is to indicate a superscript 9 (raised to the power of 9) is by preceding the number with a carrot symbol.

Roger, KL7Q

From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of lawrence mayhead
Sent: Saturday, March 03, 2007 04:33
To: rsgb
Subject: LF: Frequency

Can anyone help with explanation of following terminology for frequency:-
example 1e9
is this 1Mhz?
73 Laurie.

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