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CHAPTER 7
Using SIM 3
Measurements can be started in any of the views, but it is best to work in a particular order.
■ Band Spectrum / Line Spectrum: Begin with the spectrum — at least for the first
measurements — to determine the frequency content and amplitude of the audio signal.
TIP: These measurements are also useful for reviewing the performance
characteristics of the console and the other system electronics, and verifying
their functions.
■ Delay Finder: Before going to Frequency Response and storing traces for comparison,
each branch needs to be viewed in Delay Finder and the correct delay times set.
NOTE: As discussed in the Delay Finder section, the Console, Processor,
and Microphone points must be synchronized in order to make a valid
measurement.
■ Frequency Response: When making Frequency Response measurements, a methodical
process is usually best. The Modes menu with its various choices (Single System, Lobe
Study, Combined Systems, etc.) is designed to aid this process.
TIP: SIM School classes and the Meyer Sound Handbook are good sources to
learn more about Modes and other measurement techniques. Learn more at
www.meyersound.com/events/seminars.
7.3.3. Restarting a Measurement (Restart/Pause buttons)
It is possible with SIM 3 to pause a Live trace measurement to ease comparison with stored
measurements, and to restart a measurement.
■ Pause (Space Bar) — temporarily stops the movement of the trace (when not paused,
new data is continually being acquired and calculated).
TIP: Pause can also be enabled by tapping the Space bar on the SIM 3
keyboard. This works as a toggle switch for pausing the acquisition of data.
- USER GUIDE 1
- INTEGRATION TOOLS 1
- Office of Quality Manager 2
- Berkeley, California USA 2
- December 1, 2005 2
- SYMBOLS USED 3
- IMPORTANT SAFETY INSTRUCTIONS 4
- CONTENTS 5
- INTRODUCTION TO THIS MANUAL 7
- CHAPTER 1 10
- SIM 3 Measurement Terminology 10
- 2.1.1.5. Line Inputs 1 and 2 21
- 2.1.1.7. Headphone Output 25
- Device Under Test 26
- CHAPTER 2 27
- The SIM 3 Hardware 27
- 2.1.2.1. AC Connector 28
- 2.2. SIM-3088 LINE SWITCHER 32
- 2.2.1. Front Panel 32
- Bus Select 36
- 2.2.4.2. Audio Connections 39
- 2.3.2. Rear Panel 45
- SIM-3022 Audio Analyzer 46
- 2.4.1. Front Panel 48
- 2.4.2. Rear Panel 48
- 3.1. SETTING UP BRANCHES 57
- 3.1.1. Overview 57
- 3.1.2. Defining Branches 57
- CHAPTER 3 58
- 4.4.1.1. System Requirements 78
- CHAPTER 4 80
- Software Updating 80
- 4.4.2.2. Opening a Project 81
- 4.4.3. Viewing Data 86
- 5.1.3. Console 92
- 5.1.4. Processor 92
- 5.1.5. Microphone 92
- 5.1.6. All 92
- 5.2. LINE SPECTRUM 93
- 5.2.1. Overview 93
- 5.2.3. Console 94
- 5.2.4. Processor 94
- 5.2.5. Microphone 94
- 5.2.6. All 95
- 5.3. DELAY FINDER 95
- 5.3.1. Overview 95
- 5.4. FREQUENCY RESPONSE 99
- 5.4.1. Overview 99
- CHAPTER 5 100
- The Measurements 100
- 5.4.6. Group 101
- 5.4.3. Room 101
- 5.4.4. Processor 101
- 5.4.5. Result 101
- 102
- 6.1. OVERVIEW 103
- 6.2. GRAPH WINDOWS 103
- CHAPTER 6 107
- The SIM Measurement Screen 107
- 6.5. NAMES TAB 111
- 6.6. VALUES TAB 111
- 6.8. DELAYS TAB 115
- 6.9. SPEAKERS TAB 115
- CHAPTER 7 129
- Using SIM 3 129
- 7.2.5. Average Time 132
- 7.2.6. Time Weighting 132
- 7.4.2. Storing Measurements 143
- 7.4.6. Recalling Measurements 147
- 7.4.7. Renaming Measurements 148
- 7.4.8. Sorting Measurements 149
- 7.6.1. Overview 157
- 7.6.3.1. Setup 158
- 7.6.3.3. Delay Finder 158
- 7.7.4. Turning Traces On/Off 160
- 7.7.5. Using Trace Offset 160
- 7.8.1. EQ Overview 164
- 7.10.5. Setting Meter Ranges 171
- 7.12.6. Mic EQ 178
- 7.12.7. Console Check 178
- 7.13. PERFORMING PROCEDURES 180
- 7.13.1. Mic SPL Calibration 180
- 7.13.2. Check Noise 182
- 7.13.3. Check Max Output 182
- 7.13.4. Verify Polarity 182
- 7.13.7. Set System Level 186
- 7.13.8. Set System EQ 187
- 8.1.11. Eject CD 194
- 8.2. VIEW 194
- 8.2.1. View Cursor 194
- 8.2.5. Spectrum Max 196
- 8.2.6. Spectrum Max Hold 196
- 8.2.7. Band Spectrum Solid 197
- 8.2.8. Vertical Zoom 197
- 8.2.9. Horizontal Zoom 197
- 8.2.10. Processor Inverted 198
- 8.2.11. Phase Center at Zero 198
- 8.2.12. Show Coherence as SN 199
- 8.2.13. Smoothing 199
- 8.2.14. Trace Offsets 199
- 8.3. BRANCH 200
- 8.3.1. Edit Branches 200
- 8.3.2. Previous Branch 200
- 8.3.3. Next Branch 201
- 8.3.4. Branch 0 – Branch 32 201
- 8.4. SETTINGS 201
- 8.4.1. Switchers 201
- 8.4.6. Delay Finder Settings 203
- 8.4.8. Input Panel Settings 203
- 8.4.9. Mouse Settings 205
- 8.4.10.Time and Date 205
- 8.5. MODE 205
- 8.5.1. Free Run 205
- 8.5.2. Single System 205
- CHAPTER 8 206
- SIM 3 Menus 206
- 8.7.2. Store DataGroup 209
- 8.7.3. Recall DataGroup 209
- 8.7.4. Clear 209
- 8.7.5. Pause 209
- 8.7.6. Live 210
- 8.7.7. Memory A – Memory D 210
- 8.7.9. Room Offset +/-1 dB 210
- 8.7.10. QuickStore 210
- 8.8. GENERATOR 211
- 8.8.1. Pink Noise (Nz) 211
- 8.8.2. Sine Wave (Sine) 211
- 8.8.3. Pulse (Pls) 211
- 8.9. TABS 211
- 8.10. HELP 213
- 8.10.1. About SIM 3 213
- 8.10.2. Contents 213
- APPENDIX A: SPECIFICATIONS 215
- APPENDIX A 216
- SIM 3 Specifications 216
- APPENDIX B 218
- APPENDIX C 221
- Extended Table of Contents 221
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