Meyer Sound SIM 3 Guía de usuario Pagina 100
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CHAPTER 5
The Measurements
■ Group View - allows the user to view the Room trace and the Processor trace in the lower
window, giving the ability to visually set the EQ filters to the “raw” room response and
view the resultant corrected frequency response in the upper Results graph.
Figure 5.9. Frequency Response measurement (coherence and frequency response on top, phase on bottom)
5.4.2. Description of the Measurement
The horizontal axis of the Frequency Response graph is a logarithmic display with a resolu-
tion of 48 points/octave typical. The graph can be displayed as full bandwidth or in five fre-
quency spans. The following characteristics of the audio signal measurement are displayed:
■ Amplitude — amplitude in dB, vs. frequency
■ Phase — phase in degrees, vs. frequency
■ Coherence — coherence in percent, vs. frequency
■ dB S/N — signal-to-noise ratio in dB, vs. frequency (an alternative measurement scale to
Coherence)
- 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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