CLIOwin 7 PCI User's Manual - Audiomatica

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10.7 MLS Vs. LOG CHIRP As anticipated in the introduction, some advise are given to help choosing between MLS and LOG CHIRP stimuli. Both approach are valid and bring to equivalent results. In both cases the device we want to measure is assumed to be Linear and time Invariant. This assumption while reasonably true in general cases in never met in absolute terms. There is always a certain degree of non linearity and, in less degree, a time variance. The two approach shows different sensitivity to these facts. Advantage of MLS are that is that much less computing requiring, historically much more widespread and known and has a flat frequency energy distribution. The latter feature can be an advantage or not depending on situation/DUT. Figure 10.39 In the above figures the spectrum of both signals is showed. As usually signal to noise ratio get worse at lower frequency, the higher signal energy that LOG CHIRP has here is an advantage for S/N ratio. If the DUT does not appreciate low frequency high energy content, i.e. a tweeter, the advantage become a disadvantage. Also, there is an important difference on how non linearity affects the two procedure. In MLS distortion transforms itself in noise spread over the whole impulse response while with LOG CHIRP concentrate itself in single impulses (one for each harmonic) in the tail of the impulse and can easily be manually removed. 128 Chapter 10 - MLS
Figure 10.40 Finally a brief note on level. Setting the CLIO’s output level to 0dB you’ll have –5.2dBV with MLS and -2.2dBV with the LOG CHIRP, exactly the same level that you’d have within the Sinusoidal menu. While this is our choice, it is a by-product of the fact that MLS, in real life, has a higher crest factor than a sinusoidal signal. Chapter 10 - MLS 129
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ELECTRICAL & ACOUSTICAL TESTS User'
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CONTENTS 1 INTRODUCTION ...........
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7.10 SIGNAL FILES .................
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14.1 INTRODUCTION .................
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AUDIOMATICA’S WARRANTY Audiomatic
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12 Chapter 1 - Introduction
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2.1 THE PB-4281 PC BOARD AND SC-01
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2.2.3 THE MIC-01 (OR MIC-02) FREQUE
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2.4 THE QCBOX MODEL 4 AMPLIFIER & S
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2) 2 x Stereo mini jack to two RCA
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3.3 HARDWARE REGISTRATION WITH WIND
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3.3.2 HARDWARE REGISTRATION UNDER W
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3.3.3 HARDWARE REGISTRATION UNDER W
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Figure 3.21 Let's now verify that t
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3.4 SOFTWARE INSTALLATION This para
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3.6 RUNNING CLIOWIN FOR THE FIRST T
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3.7.1 CALIBRATION VALIDATION Figure
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3.9 TROUBLESHOOTING CLIO INSTALLATI
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4.3 CLIOWIN DESKTOP The CLIOwin des
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4.5 HARDWARE CONTROLS TOOLBAR 4.5.1
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4.5.4 MICROPHONE CONTROL Switches C
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4.6.2 CONTROLLING A TURNTABLE Fig.4
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4.7.2 ANALYSIS MENU The Analysis me
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Fig. 4.16 Sinusoidal Submenu Fig. 4
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4.7.3 CONTROLS MENU The Controls Me
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4.8 BASIC CONNECTIONS In order to c
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4.8.3 CONNECTING THE CLIOQC AMPLIFI
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T&S parameters data files. Wow&Flut
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Invokes the Autosave Settings dialo
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5.3.4 PRINTING Enters the Notes dia
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customize up to 6 different color s
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5.7.1 SAVING MEASUREMENT SETTINGS M
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6.3 BUTTONS AND CHECKBOXES Moves (s
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6.6 THE MLS TIME DOMAIN DISPLAY Whe
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The following figure shows a 1031.2
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7.4 MULTITONES It is possible to ge
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7.6 MLS It is possible to generate
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7.8 The following figure shows a 20
Page 78 and 79: The following figure shows the same
Page 80 and 81: For comparison with Pink noises the
Page 82 and 83: The following figure shows a msampl
Page 84 and 85: 84 Chapter 7 - Signal Generator
Page 86 and 87: 8.2.1 TOOLBAR BUTTONS Starts the me
Page 88 and 89: This is substantially the measureme
Page 90 and 91: With the Multi-meter running, fit t
Page 92 and 93: 8.6 INTERACTION BETWEEN THE MULTI-M
Page 94 and 95: 9.2.1 TOOLBAR BUTTONS, DROP DOWN LI
Page 96 and 97: 9.4 FFT SETTINGS DIALOG Fig. 9.2 Th
Page 98 and 99: A better approach is to center the
Page 100 and 101: it is necessary to remove the fligh
Page 102 and 103: 80.0 CLIO dBSPL 70.0 60.0 50.0 40.0
Page 104 and 105: 9.10 “LIVE” TRANSFER FUNCTION A
Page 106 and 107: Another factor of maximum importanc
Page 108 and 109: The last obstacle you may find whil
Page 110 and 111: 10.2.1 TOOLBAR BUTTONS Starts an ML
Page 112 and 113: Amplifier & SwitchBox Model 2,3 and
Page 114 and 115: 10.4 MEASURING FREQUENCY RESPONSE I
Page 116 and 117: 150.0 CLIO 180.0 150.0 CLIO 180.0 O
Page 118 and 119: speaker we are testing is a gloriou
Page 120 and 121: 10.4.4 PHASE & GROUP DELAY We used
Page 122 and 123: etween true phase, as in Fig.10.22,
Page 124 and 125: 10.5 OTHER TIME DOMAIN INFORMATION
Page 126 and 127: utton. Any process you execute can
Page 130 and 131: 10.8 RELATED MENUS The dual domain
Page 132 and 133: Display fifth harmonic distortion,
Page 134 and 135: Gating (Acquisition) Settings Gated
Page 136 and 137: 11.3 A BRIEF DESCRIPTION ON SETTING
Page 138 and 139: 11.3.3 GATING Enabling Gating allow
Page 140 and 141: 11.4 DISTORTION AND SETTINGS Sinuso
Page 142 and 143: Finally Fig.11.12 shows the distort
Page 144 and 145: 12.2 WATERFALL AND DIRECTIVITY CONT
Page 146 and 147: 12.3.2 WATERFALL OPERATION As alrea
Page 148 and 149: Figure 12.5 One powerful way to ins
Page 150 and 151: 12.5 DIRECTIVITY SPECIFIC CONTROLS
Page 152 and 153: 12.6 MEASURING AND REPRESENTING LOU
Page 154 and 155: 12.6.4 REPRESENTING POLAR DATA To r
Page 156 and 157: 156 Chapter 12 - Waterfall and Dire
Page 158 and 159: If you are a novice in using CLIO,
Page 160 and 161: life harder even if more interestin
Page 162 and 163: 13.4 I SENSE This requires Audiomat
Page 164 and 165: 0.0 CLIO 180.0 dBV Deg -10.0 108.0
Page 166 and 167: CLIO INPUT A INPUT B OUTPUT A OUTPU
Page 168 and 169: 13.7 THIELE & SMALL PARAMETERS 13.7
Page 170 and 171: L 1kHz L 10kHz Inductance at 1kHz I
Page 172 and 173: We can now save our complete result
Page 174 and 175: The graphs refers to a linearity me
Page 176 and 177: DIN measures Intermodulation distor
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15.2.1 TOOLBAR BUTTONS AND DROP DOW
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15.3 ACOUSTICAL PARAMETERS SETTINGS
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RTU [s]. Reverberation time evaluat
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184 Chapter 15 - Acoustical Paramet
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16.2.1 TOOLBAR BUTTONS AND DROP DOW
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16.3 Leq SETTINGS Time resolution S
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17.3 FEATURES Figure 17.2 Aside a s
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192 Chapter 17 - Wow & Flutter
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[20] D. Clarke, “Precision Measur
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196 Norms
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CLIOwin 7 PCI User's Manual - Audiomatica

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