DOCSLIB.ORG

LA100 Audio Analyser Manual

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
LA100 Audio Analyser Manual LA100 Audio Analyser Manual Sixth edition, June 2007 © 2007 Lindos Electronics Part number: MN100 This manual describes LA100 software version V6.7. Please refer to any accompanying update sheets if your LA100 displays a version number later than this when it is turned on or reset. Users familiar with earlier software should refer to appendix I.3 for a list of new features. We are continuously developing and enhancing the software within the LA100 and send major new software EPROMs to all users. You should therefore ensure that you complete and return the enclosed registration card directly to Lindos Electronics and advise of any change of ownership or change of address so that you receive these updates. All comments and suggestions regarding the LA100 will be gratefully received. LINDOS ELECTRONICS Technical Support (usually 24 hours): Saddlemakers Lane Telephone: +44 (1394) 380307 Melton WOODBRIDGE Fax: +44 (1394) 385156 Suffolk IP12 1PP email: [email protected] ENGLAND Contents 1.0 Introduction 9 1.1 Viewing Angle 9 1.2 Switching-On 9 1.3 The Keyboard 10 1.4 Reset 10 1.5 Memory Clear and Non-Volatile Memory 11 1.6 The Configuration Menu 12 1.7 Connectors 12 1.8 Technical Support 14 2.0 Manual Operation 15 2.1 Volume Control 15 2.2 Generating Tones 15 2.3 Measuring Tones 16 2.4 Channel Switching 18 2.5 Programmable Presets and Initial Settings 18 2.6 Relative Levels − Test Level (TL) 18 2.7 Measurement Options 19 2.8 Frequency Measurement 21 2.9 Phase Measurement 21 2.10 Noise Measurement 22 2.11 Rumble Measurement 23 2.12 Crosstalk Measurement 23 2.13 Distortion Measurement 24 2.14 Wow and Flutter Measurement 25 2.15 Speed Measurement 26 2.16 Difference Frequency Distortion Measurement 27 2.17 Quantising Distortion (QD) Measurement 29 2.18 Frequency Intermodulation (FIM) Measurement 29 2.19 Standards 30 2.20 400Hz High Pass Filter 30 2.21 Impedance & Impedance Correction (ZC) 30 2.22 dBu, dBV, Volts and Power Measurement 31 2.23 Printing the Displayed Values 33 2.24 Output Waveform 33 2.25 Miscellaneous Features 34 2.26 LA101 Weighting Curves 35 2.27 User Weighting Curves 35 2 3.0 Sequence Testing 37 3.1 Running a Sequence 41 3.2 Page Results Mode 42 3.3 Frequency Response Results 43 3.4 Printing Sequence Results 43 3.5 Storing Results in Memory 45 3.6 Cyclic Identification Character 46 3.7 Test Level 46 3.8 Input Level 47 3.9 Choosing a Sequence 47 3.10 Interpreting Sequence Results 50 3.11 Single Channel Operation 50 3.12 Single Register Operation 52 3.13 FSK Failure − Error Codes 53 3.14 Sweep Headroom 53 3.15 Peak Programme Meter (PPM) Testing 55 3.16 Normalisation of Frequency Response 56 3.17 Subtracting Reference Curves 57 3.18 Tests Which Always Subtract a Reference Curve 57 3.19 Oscillator Weightings 57 3.20 Automatic Results Storage 59 3.21 Printout Heading 60 3.22 Printout Date 60 3.23 Running Single Segments 61 3.24 Using Filters for Sequence Measurements 62 3.25 Remote Trigger 62 3.26 Breaking into a Repeating Sequence 63 3.27 CCITT O.33 Compatibility 63 4.0 User Defined Sequences 65 4.1 The Sequence Definition 66 4.2 The LA101 Sequence Editor 68 4.3 Source Identification 69 4.4 Copying a Sequence 71 4.5 Measurement Levels 71 4.6 Test Level Segments (T,V) 72 4.7 Frequency Sweep Segments (OPQRSUXorux) 73 4.8 Noise Segments (L,M,N,n) 73 4.9 Crosstalk Segments (A,B,C,J,c) 74 4.10 Distortion Segments (D,E,F,G,I) 74 3 4.11 Wow & Flutter Segment (W) 75 4.12 Phase Segments (Y, Z, z) 75 4.13 User Level Segment (K) 75 4.14 Maximum Output Level (MOL) Segments (H, h) 76 4.15 Difference Frequency Distortion (d) 77 4.16 Tone Burst/Tones Segment (!) 78 4.17 Repeating Segments and Sequences (<) 81 4.18 Multiple Results Compartments 81 4.19 Selecting a Tolerance (±) 83 4.20 Output Impedance Segment (%) 83 4.21 Sequence Level Segment (/) 84 4.22 Channel Segment (:) 84 4.23 Subroutine Segment (>) 85 4.24 Pause Segment (?) 85 4.25 Sweep Headroom (^n) 85 4.26 Subtract a Reference Curve (\n) 86 4.27 Equivalent ! Segments 86 4.28 CCITT O.33 Sequences 87 4.29 Apply weighting (=n) 88 5.0 Tolerance Testing 89 5.1 Applying a Tolerance 92 5.2 Pre-Defined Tolerances 92 5.3 Tolerance Strings 93 5.4 The Tolerance Definition 93 5.5 Printout Format 95 5.5 Printout Format 95 5.6 The LA102 Tolerance Editor 96 5.7 Editing Tolerances on a Remote Computer 98 5.8 Example Tolerance 98 6.0 Using Test Tapes and Discs 101 6.1 Test Tape Mode 101 6.2 Frequency Sweep Mode 103 6.3 Frequency Response Results 104 6.4 Automatic W&F Measurement on Test Tapes 104 7.0 Applications Advice 107 7.1 Tape Machines 107 7.2 Loudspeakers 108 7.3 Microphones & Low Level Inputs 108 7.4 Lines, Links & Networks 109 4 7.5 Mixing Consoles 110 7.6 Filters and Equalisers 110 7.7 Compact Disc Players 111 7.8 Amplifiers 111 7.9 Production Testing 111 7.10 Meter Testing 111 7.11 FM Transmitter Systems 112 8.0 Using Printers 113 8.1 Setting Up the Printer 113 8.2 Printing 114 8.3 Printout Format 115 8.4 Printers and the Configuration Menu 115 8.5 Choosing a Printer 117 8.6 9 Pin Dot Matrix Printers 117 8.7 Epson LQ and Other 24 Pin Printers 118 8.8 Inkjet Printers 118 8.9 Portable Printers 119 8.10 Printer Problems 119 9.0 Remote Control 121 9.1 Connecting the LA100 to a Computer 122 9.2 The RS232 Serial Data Format 123 9.3 Entering Remote Mode 123 9.4 Command Format 125 9. 5 Some Examples 126 9.6 Hints on Writing Programs 127 9.7 Errors 130 9.8 General Purpose Commands 131 9.9 LA101 Output Commands 133 9.10 LA101 Preset Commands 135 9.11 LA101 Frequency Sweeps & Tone Burst Commands 136 9.12 LA101 Weighting Curves 137 9.13 LA102 Measurement Commands 137 9.14 Running a Sequence 141 9.15 Defining a Sequence 143 9.16 Reading Sequence Results 144 9.17 LA102 Heading and Date 150 9.18 Tolerance Testing 150 9.19 Memory Operations 151 9.20 Using the Smart Sequence Modes 152 9.21 User Sweeps 153 5 9.22 Using Sequences 155 10.0 Service Information 157 10.1 EPROM Replacement 157 10.2 Recalibration 158 10.3 Power Supply Voltage 159 10.4 System Overview 159 10.5 Fault Diagnosis 160 10.6 Selftest Failed 161 10.7 5V Power Supply Check 161 10.8 ±15V Power Supply Check 162 10.9 Battery Testing 162 10.10 No LA101 Output 164 10.11 Level Errors 164 10.12 Reed Relay Faults 165 10.13 Microprocessor Faults 166 10.14 Display Faults 167 10.15 Replacing Boards 167 10.16 Spares 167 10.17 LA101 Loudspeaker 168 Appendix A Accessories 169 A.1 Items Supplied with the LA100 169 A.2 Computer Support Software 169 A.3 Conversion Kits (Rack Mount/Separate) 169 Appendix B Audio Sockets 171 B.1 Rear XLR Connectors 171 B.2 Front Jack Sockets 172 B.3 BNC Sockets 172 Appendix C RS232 Connections 173 Appendix D Circuit Diagrams 175 Appendix E Error Messages 179 Appendix F Frequency Lists 182 F.1 IEC Third Octave Frequencies (and remote codes) 182 F.2 LA101 Frequencies and Remote Codes 182 6 Appendix G LA102 Filter Graphs 185 Appendix H FSK Header Format 187 Appendix I LA100 Versions 188 I.1 LA100 History 188 I.2 Upgrading Early Units 188 I.3 Software Changes 188 I.4 Rack Mounted Unit (LA100R) 192 I.5 CCITT O.41 Filter Version (LA100C) 192 I.6 Power Supply Monitoring (LA100P) 193 I.7 Telecom Australia Version (LA100T) 193 Appendix J Specification 194 J.1 LA101 Audio Oscillator 194 J.2 LA102 Audio Measuring Set 195 J.3 Common to Both Units 197 Index 199 List of Tables 1.5 Configuration Options 13 2.6 Measurement Options 20 2.19 Impedance Correction Modes 31 3.1 Default sequences 38 3.2 Test Segments 40 3.14 Allocation of Sequence Banks 47 4.1 Control segments 67 5.3 Pre-defined Tolerances in the LA102 90 8.1 Printer configurations 117 9.3 Remote Command Summary 130 F.1 Third Octave Frequencies and Remote Codes 184 F.2 LA101 Frequencies and Remote Codes 186 7 8 1.0 Introduction The first time user should read this chapter, which describes basic features common to both units, but may then proceed to chapters 2 or 3 for a complete introduction to either manual or sequence measurement. Sequence measurement is a very easy way of making a predefined sequence of measurements, at the press of a few keys, without any programming effort, and without any connection between units other than the signal path. New users should refer to chapter 7 for applications advice on testing specific devices and also appendix A which lists the items supplied with the LA100 and the optional accessories which are available. Other sections of the manual give further information on defining sequences, tolerance testing, using printers, remote computer control via the serial (RS232) interface and on servicing the LA100 as there is no separate service manual.
Load more

Recommended publications
  • CCIF (Geneva, 1954)
    This electronic version (PDF) was scanned by the International Telecommunication Union (ITU) Library & Archives Service from an original paper document in the ITU Library & Archives collections. La présente version électronique (PDF) a été numérisée par le Service de la bibliothèque et des archives de l'Union internationale des télécommunications (UIT) à partir d'un document papier original des collections de ce service. Esta versión electrónica (PDF) ha sido escaneada por el Servicio de Biblioteca y Archivos de la Unión Internacional de Telecomunicaciones (UIT) a partir de un documento impreso original de las colecciones del Servicio de Biblioteca y Archivos de la UIT. (ITU) ﻟﻼﺗﺼﺎﻻﺕ ﺍﻟﺪﻭﻟﻲ ﺍﻻﺗﺤﺎﺩ ﻓﻲ ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﺃﺟﺮﺍﻩ ﺍﻟﻀﻮﺋﻲ ﺑﺎﻟﻤﺴﺢ ﺗﺼﻮﻳﺮ ﻧﺘﺎﺝ (PDF) ﺍﻹﻟﻜﺘﺮﻭﻧﻴﺔ ﺍﻟﻨﺴﺨﺔ ﻫﺬﻩ .ﻭﺍﻟﻤﺤﻔﻮﻇﺎﺕ ﺍﻟﻤﻜﺘﺒﺔ ﻗﺴﻢ ﻓﻲ ﺍﻟﻤﺘﻮﻓﺮﺓ ﺍﻟﻮﺛﺎﺋﻖ ﺿﻤﻦ ﺃﺻﻠﻴﺔ ﻭﺭﻗﻴﺔ ﻭﺛﻴﻘﺔ ﻣﻦ ﻧﻘﻼ ً◌ 此电子版（PDF版本）由国际电信联盟（ITU）图书馆和档案室利用存于该处的纸质文件扫描提供。 Настоящий электронный вариант (PDF) был подготовлен в библиотечно-архивной службе Международного союза электросвязи путем сканирования исходного документа в бумажной форме из библиотечно-архивной службы МСЭ. © International Telecommunication Union INTERNATIONAL TELEPHONE CONSULTATIVE COMMITTEE (C. C. I. F.) XVIIth PLENARY ASSEMBLY GENEVA, 4-12 OCTOBER, 1954 VOLUME III LINE TRANSMISSION MAINTENANCE Published by the International Telecommunication Union Geneva, 1956 INTERNATIONAL TELEPHONE CONSULTATIVE COMMITTEE (C. C. I. F.) XVIIth PLENARY ASSEMBLY GENEVA, 4-12 OCTOBER, 1954 VOLUME III LINE TRANSMISSION MAINTENANCE PAGE INTENTIONALLY LEFT BLANK PAGE LAISSEE EN BLANC INTENTIONNELLEMENT TABLE OF CONTENTS OF VOLUME III OF THE GREEN BOOK OF THE C.C.I.F. Line Transmission Maintenance Page Tables summarising the characteristics of circuits: Telephony (and telegraphy)................................................................................................... 16 Programme transm issions.......................................................................................... 18 T elevision.........................................
    [Show full text]
  • ABBREVIATIONS EBU Technical Review
    ABBREVIATIONS EBU Technical Review AbbreviationsLast updated: January 2012 720i 720 lines, interlaced scan ACATS Advisory Committee on Advanced Television 720p/50 High-definition progressively-scanned TV format Systems (USA) of 1280 x 720 pixels at 50 frames per second ACELP (MPEG-4) A Code-Excited Linear Prediction 1080i/25 High-definition interlaced TV format of ACK ACKnowledgement 1920 x 1080 pixels at 25 frames per second, i.e. ACLR Adjacent Channel Leakage Ratio 50 fields (half frames) every second ACM Adaptive Coding and Modulation 1080p/25 High-definition progressively-scanned TV format ACS Adjacent Channel Selectivity of 1920 x 1080 pixels at 25 frames per second ACT Association of Commercial Television in 1080p/50 High-definition progressively-scanned TV format Europe of 1920 x 1080 pixels at 50 frames per second http://www.acte.be 1080p/60 High-definition progressively-scanned TV format ACTS Advanced Communications Technologies and of 1920 x 1080 pixels at 60 frames per second Services AD Analogue-to-Digital AD Anno Domini (after the birth of Jesus of Nazareth) 21CN BT’s 21st Century Network AD Approved Document 2k COFDM transmission mode with around 2000 AD Audio Description carriers ADC Analogue-to-Digital Converter 3DTV 3-Dimension Television ADIP ADress In Pre-groove 3G 3rd Generation mobile communications ADM (ATM) Add/Drop Multiplexer 4G 4th Generation mobile communications ADPCM Adaptive Differential Pulse Code Modulation 3GPP 3rd Generation Partnership Project ADR Automatic Dialogue Replacement 3GPP2 3rd Generation Partnership
    [Show full text]
  • Studio-Sound-1976-09
    www.americanradiohistory.com We know it helps the manufacturer to set rigid standardisation of their equipment formats - most do! It doesn't help you. The penalty need not be a sharp increase in cost We at Cadac do not expect you to suffer these short comings. Our fully modularised range of equipment leaves the flexibility of choice with you - and the cost? Lower than you would expect on a console for console comparison basis. The most versatile recording equipment in the world. S ti {'4 4 asaa+ndaliAarlf Z b 4\ a a a '` ' " {ti yE 4à4 47 ÿ4'4 ,t : :ttttp1Ñ.;v'Y+°rti , ?AA _.. t' S, A.Vfifii"4446*0é : 04 r . VOGUE P.I.P STUDIOS - FRANCE The leaders in music recording consoles and techniques. Cadac (London) Ltd. 141, Lower Luton Road Harpenden Herts. AL5 5EL 3 Harpenden (STD 05827) 643511 Telex 826323 www.americanradiohistory.com i' ITOR RAY CARTER TECHNICAL EDITOR FRANK OGDEN EDITORIAL PRODUCTION studio sound DRUSILLA DALRYMPLE :ONSULTANT HUGH FORD AND BROADCAST ENGINEERING ECUTIVE ADVERTISEMENT ANAGER For nearly ten years Dolby A has effectively been the industry standard for noise reduction; DOUGLAS G. SHUARD other systems, despite their merits, amounted to opposition rather than competition. However, ADVERTISEMENT MANAGER more tracks and greater use of ping -pong within the rest of the recording chain now TONY NEWMAN pressurises studios into overriding the wishes of their accountants by obtaining a double kDVERTISEMENT REPRESENTATIVE inventory of noise reduction equipment. And of course the force for change is aided, as always, PHYLLIS BIRCH by the persistent technological rhetoric of those who have something to sell to those who haven't yet bought their quota; but that's life.
    [Show full text]
  • Pinguin Audio Meter Mac
    1 / 4 Pinguin Audio Meter Mac Subscribe now to Friedemann's Sound Kitchen: goo.gl/isy0AZDas neue ... stellt Pinguin PG-AMM .... Jul 2, 2009 — Pinguin Audio Meter PG-AM 4.5 · Stand-allone PC software with USB dongle. · Independent operation requires sound card with S/P- DIF or AES/ .... Pinguin Audio Meter Mac >>> http://bytlly.com/18ejhv. ... Free,pinguin,audiometer,downloads,.,Pinguin,Audio,Meter,has,4,build,in,high,quality,16bit,instruments .... May 15, 2008 — (Plus it runs well under Parallels on my MacBook Pro ;-); Pinguin Audio Meter Not free but comes in several flavours, the Pro version includes .... Sep 11, 2010 — The PINGUIN Audio Multi Meter, PG-AMM for short, can be seen in use ... All the meters run native on standard PCs (with Windows® or Mac OS .... Oct 24, 2019 — Since 1988 the german engineering service Pinguin cares about ways to enhance professional digital audio with easy user interfacing.. Coleman Audio MBP2 Stereo Desktop VU Meter for Balanced XLR Audio The MBP2 ... Support Communities / Desktop Computers / Mac mini Looks like no one's ... Multimedia tools downloads - Pinguin Audio Meter by Pinguin HH Germany .... Pinguin Audio – Meter Standard 2.3 Build 600 WiN KGN AiR/BEAT | 2009 | Use Compatibility ... pinguin audio meter 4.5 torrent ... guitar pro crashes on mac. Pinguin Audio Meter Free Decibel Meter Pinguin Audio Meter Torrent Azureus And Pinguin... powered by Peatix : More than a ticket.. Pinguin PG-AMM stereo multi-meter for MAC and PC with USB dongle, max. 10 instruments ... Pinguin. Audio Meter 2.3.0.600 + Crack Keygen/Serial.. Pinguin Audio Multi Meter (PG-AMM) is a very powerful and accurate digital Audio- Metering-System for stereo.
    [Show full text]
  • TI S4 Audio Frequency Test Apparatus.Pdf
    TECHNICAL INSTRUCTION S.4 Audio-frequency Test Apparatus BRITISH BROADCASTING , CORPORATION ENGINEERING DlVlSlON - ', : . iv- TECHNICAL INSTRUCTION S.4 Third Issue 1966 instruction S.4 Page reissued May. 1966 CONTENTS Page Section I . Amplifier Detector AD14 . 1.1 Section 2 . Variable Attenuator AT119 . Section 3 . Wheatstone Bridge BG/I . Section 4 . Calibration IJnit CALI1 . Section 5. Harmonic Routine Tester FHP/3 . Section 6 . 0.B. Testing Unit 0BT/2 . Section . 7 . Fixed-frequency Oscillators OS/9. OS/ 10. OS/ IOA . Section 8 . Variable-frequency Oscillators TS/5 .. TS/7 . 1' . TS/8 . TS/9 . TS/ 10. TS/ 1OP . Section 9 . Portable Oscillators PTS/9 . PTS/IO . ... PTS/12 . PTS/13 . PTS/l5 .... PTS/l6 .... Appendix . The Zero Phase-shift Oscillator with Wien-bridge Control Section 10. Transmission Measuring Set TM/I . Section 1 I . Peak Programme Meter Amplifiers PPM/2 ..... PPM/6 . TPM/3 . Section 12 Valve Test Panels VT/4. VT/5 "d . Section 13. Microphone Cable Tester MCT/I . Section 14 . Aural Sensitivity Networks ASN/3. ASN/4 Section 15 . Portable Amplifier Detector PAD19 . Section 16. Portable Intermodulation Tester PIT11 Section 17. A.C. Test Meters ATM/I. ATM/IP . Section 18 . Routine Line Testers RLT/I. RLT/IP . Section 19. Standard Level Panel SLP/3 . Section 20 . A.C. Test Bay AC/55 . Section 21 . Fixed-frequency Oscillators: OS2 Series Standard Level Meter ME1611 . INSTRUCTION S.4 Page reissued May 1966 ... CIRCUIT DIAGRAMS AT END Fig. 1. Amplifier Detector AD14 Fig. 2. Wheatstone Bridge BG/1 Fig. 3. Harmonic Routine Tester FHP/3 Fig. 4. Oscillator OS/9 Fig.
    [Show full text]
  • Peak Programme Meters
    Peak Programme Meters Audio signals in nature can cover an extremely wide dynamic range extending from, at the quietest level, below the threshold of hearing to, at the loudest level, greatly in excess of the threshold of pain! Broadcasters of course do not attempt to emulate this dynamic range, and for entirely practical reasons a very much reduced dynamic level variation must be transmitted. The Listener, or Viewer, will adjust the volume setting in their own home environment so that the Programme is clearly audible above the domestic background noise which will vary from location to location. Invariably Broadcasters restrict the dynamic level range of the transmitted Programme in order to increase the "impact" of the programme audio over this domestic ambience. The dynamic range is restricted by a combination of close- microphone and electronic compression using "dynamic limiters", and in essence, these techniques make the programme's audio sound louder than it would otherwise be. This compression is usually gross on Pop Music channels where the dynamic range is severely limited and often pretty obvious on Commercials too. Measuring audio levels, in a programme production environment, is more complicated than appears at first glance. Programme Audio is subject to the following:- 1) Wide, though restricted, dynamic range. 2) Wide, though restricted, frequency response. 3) Short duration transients 4) Positive and negative signal excursions are often different by many dB. 5) The degree of audio compression will affect measurements. 6) Stereo Phase considerations. 7) The metering must be clear and unambigous. 8).....and other more subtle effects. The characteristics of the measuring device itself totally weight the achieved measurement.
    [Show full text]
  • R&D Report 1963-29
    ~ I' I RESEARCH DEPARTMENT THE RELATIVE MERITS OF THE V,U. METER AND PEAK PROGRAMME METER IN THE REGULATION OFAoFo SIGNALS IN BROADCASTING Report No, L-OS4 (1963/29 ) ;.,y9.,c lwn-.J.;\/.st:Jlt1'L ._ - . E. R, Wigan, Eo Se. (Eng), A.M. LE. E- (W. Proctor Wilson) This Report 1. the property of the British Broadcasting Corporation and may not be reproduced in any form wlthout the written permission of the Corporation. Report No. L-054 THE RELATIVE MERITS OF THE V.U. METER AND PEAK PROGRAMME METER IN THE REGULATION OF A. F. SIGNALS IN BROADCASTING Section Title Page SUMMARY 1 L INTRODUCTION 1 THE MAINTENANCE OF HIGH AVERAGE MODULATION DEPTH 2 3,. THE REGULATION OF THE MAXIMA AND MINIMA OF THE PROGRAMME SIGNAL RANGE 0 • • • • • • • • • • • • • • • • • • 2 4. OBSERVATIONS ON THE PERFORMANCE OF THE V.U. METER AS A PEAK- INDICATING INSTRUMENT . 0 • • • • • • • • • • • • 3 5. THE USE OF PROGRAMME METERS FOR TRANSMISSION MEASUREMENT 4 6. V.U. METERS AND PEAK-READING INSTRUMENTS USED AS LOUDNESS METERS ....................... 5 CONCLUSIONS 5 REFERENCES 6 Report No. L-OS4 August 1963 (1963/29) THE RELATIVE MERITS OF THE VoU. METER AND PEAK PROGRAMME METER IN THE REGULATION OFAoFo SIGNALS IN BROADCASTING An arttcle published in the KB,U, Review No, 79-A, June 1963 SUMMARY TI1e relative merits of the 'VoU, meter' and 'Peak Programme Meter' (PoP~t) as volume~indicating devices have been hotly if inconclusively contested for many years, this article introduces some points which merit fuller discussion and is based on the experience gained by the BBC in the last decade, TIle conclusion is confirmed that a quasi-peak reading instrument such as the P .
    [Show full text]
  • Audio Metering
    Audio Metering Measurements, Standards and Practice This page intentionally left blank Audio Metering Measurements, Standards and Practice Eddy B. Brixen AMSTERDAM l BOSTON l HEIDELBERG l LONDON l NEW YORK l OXFORD PARIS l SAN DIEGO l SAN FRANCISCO l SINGAPORE l SYDNEY l TOKYO Focal Press is an Imprint of Elsevier Focal Press is an imprint of Elsevier The Boulevard, Langford Lane, Kidlington, Oxford, OX5 1GB, UK 30 Corporate Drive, Suite 400, Burlington, MA 01803, USA First published 2011 Copyright Ó 2011 Eddy B. Brixen. Published by Elsevier Inc. All Rights Reserved. The right of Eddy B. Brixen to be identified as the author of this work has been asserted in accordance with the Copyright, Designs and Patents Act 1988 No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or any information storage and retrieval system, without permission in writing from the publisher. Details on how to seek permission, further information about the Publisher’s permissions policies and our arrangement with organizations such as the Copyright Clearance Center and the Copyright Licensing Agency, can be found at our website: www.elsevier.com/permissions This book and the individual contributions contained in it are protected under copyright by the Publisher (other than as may be noted herein). Notices Knowledge and best practice in this field are constantly changing. As new research and experience broaden our understanding, changes in research methods, professional practices, or medical treatment may become necessary. Practitioners and researchers must always rely on their own experience and knowledge in evaluating and using any information, methods, compounds, or experiments described herein.
    [Show full text]
  • Msd600m++ & Pt0600m
    DK MSD600M_4pp_Sep09:Layout 1 24/8/09 11:30 Page 1 PRODUCT CODE: MSD600M++ & PT0600M Features... • The Peak Programme Meter measures level of up to 32 audio channels simultaneously. • 7 scales directly selectable to conform to standard used. • PPM colours and headings are user programmable for easy identification. • Vectorscope for stereo and surround sound with unique JellyFish™ & StarFish™ display supports aural impression at a glance. • Multiple phase correlation meter indicates proper phasing to allow for downmix . • Rotary knob controls output volume for The MSD600M++ and PT0600M, Stereo SURROUND SOUND direct connection to active monitor and Surround Sound Meters, from DK- loudspeakers (PT0660) Technologies offer phasemeter, audio As surround sound becomes more and more the standard vector oscilloscope and PPM / VU level • 10 presets are directly accessible for fast in studios nowadays, accurate audio monitoring is recall of settings (PT0660) meter as the primary tools. becoming increasingly important. DK-Technologies‘ exclusive Jelly-Fish™ and StarFishTM surround • Modular, choice of input modules The Level Meter has direct selection of 7 PPM/VU scales. indicators have become the adopted standard, accepting analogue audio, AES3 and All the standard scales are available including Nordic, presenting the surround sound image in a logical and SDI, with de-embedder for SDI video. EBU, BBC, ABC, NBC, DIN, VU, Digital and others. Each intuitive way. The level and energy content of all channels scale can be configured individually concerning overload • Flexible, up to 8 analogue audio is easily recognizable on the screen. Signal correlation level and reference level. Furthermore the colour and outputs and 4 AES3 outputs connect via and phase errors in individual vectors are immediately width of each PPM bar can be set by the user.
    [Show full text]
  • Electronic-Engineeri
    ec ronic ngincerin JUNE 1951 3 WAY MIXER Fi• PEAK PROGRAMME METER for recording and large sound installations, etc. One milliwatt output on 600 ohm line (.775 V) for an input of 30 microvolts on 7.5-30 ohm balanced input. Output balanced or unbalanced by internal switch. The meter reading is obtained by a valve voltmeter with 1second time constant, which reads programme level, and responds to transient peaks. Calibration in 2 db steps, to plus 12 db and minus 20 db referred to zero level. Special low field internal power packs supplies 8 valves including stabilising and selenium rectifier, consumption 23 watts. Manufactured by VORTEXION LIMITED 257-263 THE BROADWAY, WIMBLEDON, LONDON, S.W.I9 Telephones: LIBerty 2814 and 6242-3. Telegrams: "Vortexion, Wimble, London ". The VITAL LINK For the to job of connecting the T/V Camera to the trol van something extra in the way of a tra g cable system is needed. This is well provi for in BICC T/V Camera Cables with mould -on Polypole Couplers. Take the 22-core cable for instance :by the use of single wire conductors the diameter is reducej to only •850 in.—two-thirds the size of its conve onal stranded wire equivalent! And the Polypo 1 Coupler, integrally moulded to the cable end, reduces he possibility of conductor breakage to a minimu Truly aperfect combination built for the job— dit bears the BICC hallmark of dependability. Our technical staff will be pleased to discus this new development with you. TIII CAMERA CABLE COUPLE BRITISH INSULATED CALLENDER'S CABLES LIMITED NORFOLK HOUSE, NORFOLK STREET, LONDON, W C.
    [Show full text]
  • Beogram 4000C
    Beogram 4000c Technical Sound Guide Bang & Olufsen A/S This manual is for information purposes only and is not legally binding. May 21, 2021 Contents 1 History 4 1.1 The mechanical phonograph . 4 1.2 Magnets and Coils . 4 2 The physics 5 2.1 Amplitude vs. Velocity . 5 2.2 Surface noise . 5 2.3 Mono to Stereo . 6 3 The cartridge, stylus, and tonearm 8 3.1 MMC: Micro Moving Cross . 8 3.2 Signal Levels . 9 3.3 Tip shape . 11 3.4 Bonded vs. Nude . 13 3.5 Tracking force . 13 3.6 Effective Tip Mass . 14 3.7 Compliance . 14 3.8 Soundsmith SMMC20CL . 15 3.9 Tangential Tracking . 15 4 Audio Specifications 17 4.0.1 Magnitude Response . 17 4.0.2 Rumble . 17 4.0.3 Rotational speed . 17 4.0.3.1 Accuracy . 17 4.0.3.2 Stability . 17 4.0.3.3 Measurement and Weighting . 18 4.0.3.4 Expressing the result . 19 5 Reading the measurement datasheet 20 5.1 Measurements from Vinyl . 20 5.1.1 Magnitude Response . 20 5.1.2 Channel Matching . 21 5.1.3 Crosstalk . 21 5.1.4 Rumble . 21 5.1.5 Wow and Flutter . 21 5.1.6 Frequency Drift . 22 5.2 RIAA Preamplifier . 22 5.2.1 Magnitude Response Deviation . 22 5.2.2 Channel Matching . 22 6 Beogram 4000c Specifications 24 7 Further Reading 25 2 3 History 1.1 The mechanical the groove became smoothed.2 bi-directional. When current is sent through a wire, a magnetic field is phonograph It was ten years later, in 1887, that the generated around it.
    [Show full text]
  • The Ebu Standard Peak-Programme Meter for the Control of International Transmissions
    THE EBU STANDARD PEAK-PROGRAMME METER FOR THE CONTROL OF INTERNATIONAL TRANSMISSIONS Tech. 3205-E 2nd edition, November 1979 Note: This Technical Document is now superseded by EBU R128, “Loudness normalisation and permitted maximum level of audio signals”. The current document is therefore kept only as a historical record. CONTENTS Introduction............................................................................................................ 3 General.................................................................................................................. 5 TEXT Characteristics of the standard instrument ............................................................ 7 1. Presentation....................................................................................................... 7 2. Static performance............................................................................................. 8 3. Dynamic response........................................................................................... 10 4. Miscellaneous characteristics.......................................................................... 12 Appendix 1: Additional information for mechanical (galvanometer) instruments . 13 Appendix 2: Comparison of indications produced by other instruments.............. 15 LEGACY 2 Peak Programme Meter EBU Tech. 3205-E INTRODUCTION From the earliest days of broadcasting there has been a need for an instrument capable of measuring the amplitude of the electrical signals corresponding to a sound programme. This
    [Show full text]