From owner-qrp-l@LEHIGH.EDU Sun Sep 28 19:46:44 1997 Received: from fidoii.CC.lehigh.EDU (fidoii.CC.lehigh.EDU [128.180.1.4]) by oucsace.cs.ohiou.edu (8.8.5/8.8.5) with ESMTP id TAA20672 for ; Sun, 28 Sep 1997 19:46:43 -0400 (EDT) Received: from Lehigh.EDU ([127.0.0.1]) by fidoii.cc.Lehigh.EDU with SMTP id <35457-55184>; Sun, 28 Sep 1997 19:44:47 -0400 Received: from nss2.CC.Lehigh.EDU ([128.180.1.26]) by fidoii.cc.Lehigh.EDU with ESMTP id <34840-23444>; Sun, 28 Sep 1997 19:43:30 -0400 Received: from zia.aoc.nrao.edu (zia.aoc.nrao.edu [146.88.1.4]) by nss2.CC.Lehigh.EDU (8.8.5/8.8.5) with SMTP id TAA111297 for ; Sun, 28 Sep 1997 19:43:28 -0400 Received: (from pharden@localhost) by zia.aoc.nrao.edu (8.6.12/8.6.10) id RAA15961 for qrp-l@lehigh.edu; Sun, 28 Sep 1997 17:43:27 -0600 Message-Id: <199709282343.RAA15961@zia.aoc.nrao.edu> Date: Sun, 28 Sep 1997 17:43:27 -0600 Reply-To: pharden@aoc.nrao.edu Sender: owner-qrp-l@LEHIGH.EDU Precedence: bulk From: Paul Harden To: "Low Power Amateur Radio Discussion" Subject: O-SCOPES: Introduction X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN Status: RO OSCILLOSCOPES - BASIC USE AND MEASUREMENTS by Paul Harden, NA5N INTRODUCTION ---------------------------------------------------------------------- To follow are the text versions of an article I wrote for the Summer 1997 issue of NorCal's "QRPp," entitled "Oscilloscopes (Part 1)". The article contains numerous illustrations and photos of oscilloscope displays, which unfortunately can not be included in this text file. "Oscilloscopes (Part 2)" will appear in the Winter 1997 "QRPp," and I'll make it a continuation of this text file series at that time. THE QRP-L TEXT FILES ... have been broken down into 4 text files for posting to QRP-L and to make the files a bit more manageable by keeping them less than 10K each, which contain: O-SCOPES PART 1: Basic oscope description, calibration and controls O-SCOPES PART 2: Measurements: DC and AC voltages; time and frequency O-SCOPES PART 3: Measurements: Amplifier gain and Insertion Loss O-SCOPES PART 4: Measurements: Phase shifts and delays There are real-world QRP examples following each measurement topic, of which most can be done with a limited bandwidth scope. The text has been altered slightly from the original article to compensate for the lack of illustrations. Hopefully you'll find these informative and useful in learning how to better use your oscilloscope. IN PART 2 of the QRPp article, and the subsequent QRP-L Text Files, I'll PROBE (bad pun) into some advanced measurement techniques, even with a simple scope, such as measuring sideband rejection, tuned circuts, filter responses, group delays, VCO phase noise, etc. (and what it all means). I would guess that will be posted around January 1997 (I haven't written it yet for QRPp!) PACIFICON ... For those attending the NorCal QRP Forum at PacifiCon October 17-19, 1997 (TDO - Three Days in October?) ... I'll be discussing much of this in my presentation, where I'll go through many basic test and alignment procedures on a QRP rig using only a DVM and an oscilloscope. Learn how to check sideband rejection, filter bandwidth and shape, etc. with only a DVM ... and even more gooder if you have a scope. And if you have a portable scope you need help with, or doubt the calibration, bring it along and I'll give you a hand with it saturday night during the building contest and general goof-off time, errr, I mean hospitality session. 72, Paul Harden, NA5N NA5N@Rt66.com