CLIOwin 6.5 PCI User's Manual - Audiomatica Srl

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-10.0 CLIO dBV -30.0 -50.0 -70.0 -90.0 110.0 0.00 100 200 300 400 500 600 700 800 Hz 900 999 Figure 13.8 Reader could be tempted to determine absolute quality of the device by means of this procedure. While he or she may be right, a lot of experience is needed. One important parameter, for reliable comparison among devices, is the value, in VRMS, at the speaker terminals at resonance. It is shown from FFT as -10dBV that are 0.316VRMS. 13.3.3 DEALING WITH ENVIRONMENTAL NOISE The next problem in measuring loudspeaker impedance is noise. Transducers do their job in both directions and noise will appear as voltage exactly where CLIO’s input is connected. To evaluate the problem we deliberately produced a disturb generating a 110Hz single tone causing 58 dBSPL at the speaker cone. We took two impedance curves in this condition one with MLS the second with Sinusoidal. Both were taken at- 10dBu, a value that gained our favor before. Results are in Fig.13.6 for MLS and Fig .13.7 for Sinusoidal. 25.0 CLIO 180.0 25.0 CLIO 180.0 Ohm Deg Ohm Deg 20.0 108.0 20.0 108.0 15.0 36.0 15.0 36.0 10.0 -36.0 10.0 -36.0 5.0 -108.0 5.0 -108.0 0.0 -180.0 20 Hz 100 1k 10k 20k Figures 13.6 and 13.7 0.0 -180.0 10 Hz 100 1k 10k 20k This is one reason why we prefer sinusoidal analysis to measure impedance. 13.3.4 DEALING WITH VIBRATIONS The last enemy we consider are external vibrations. 130 Chapter 13 - Measuring impedance and T&S parameters
25.0 CLIO 180.0 Ohm Deg 20.0 108.0 15.0 36.0 10.0 -36.0 5.0 -108.0 0.0 -180.0 10 Hz 100 1k 10k 20k Figure 13.8 Fig.13.8 is an impedance curve taken with the loudspeaker disposed on a computer table, on one of those appendices that may be set up or down upon needs. This stuff clearly resonates, exited by the loudspeaker, around 200Hz. No matter how good the loudspeaker is fixed to a structure if this does move by itself. Usually there is no need to fix anything as long as you are using a stable, non-resonating structure. Up to now we dealt with Internal Mode. We will briefly go trough the others modes; problems found up to here will remain the same or worsen from here on. Chapter 13 - Measuring impedance and T&S parameters 131
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ELECTRICAL & ACOUSTICAL TESTS User'
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CONTENTS 1 INTRODUCTION ...........
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8.5.1 MEASURING AN INDUCTOR .......
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1 INTRODUCTION 1.1 ABOUT THIS MANUA
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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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Figure 3.1 2) 2 x Stereo mini jack
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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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36 Chapter 3 - Installation
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38 Chapter 4 - Troubleshooting CLIO
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5.3 CLIOWIN DESKTOP The CLIOwin des
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It is possible to generate the foll
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Fig.5.5 Microphone sensitivity dial
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5.5.2 CONTROLLING A TURNTABLE Fig.5
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5.6.2 ANALYSIS MENU The Analysis me
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H Enables the Hold function. Equiva
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CTRL+P Swithces on and off the micr
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5.7.2 CONNECTING A MICROPHONE For a
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56 Chapter 5 - CLIOwin basics
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When you find a CLIOwin data file i
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Enters the Notes dialog where it is
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6.3.5 CALIBRATION File > Calibratio
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6.3.7 STARTUP OPTIONS AND GLOBAL SE
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7.3 BUTTONS AND CHECKBOXES Moves (s
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7.6 THE MLS TIME DOMAIN DISPLAY Whe
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8.2.1 TOOLBAR BUTTONS Starts the me
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This operating mode is very useful;
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Figure 8.7 With the Multi-meter run
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76 Chapter 8 - Multi-Meter
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9.2.1 TOOLBAR BUTTONS Starts an FFT
Page 80 and 81: 9.4 FFT AND RTA OPERATION The FFT a
Page 82 and 83: 9.5 AVERAGING Averaging plays a ver
Page 84 and 85: 9.6 TIME DATA DISPLAY (OSCILLOSCOPE
Page 86 and 87: 10.2.1 TOOLBAR BUTTONS Starts an ML
Page 88 and 89: 10.2.4 MLS POST-PROCESSING TOOLS Lo
Page 90 and 91: 10.4 MEASURING FREQUENCY RESPONSE I
Page 92 and 93: 150.0 CLIO 180.0 150.0 CLIO 180.0 O
Page 94 and 95: MLS Menu, select dBSPL as Y scale u
Page 96 and 97: 10.4.4 PHASE & GROUP DELAY We used
Page 98 and 99: 110.0 CLIO 7.50 dBSPL ms 100.0 6.00
Page 100 and 101: 10.5 OTHER TIME DOMAIN INFORMATION
Page 102 and 103: utton. Any process you execute can
Page 104 and 105: 104 Chapter 10 - MLS
Page 106 and 107: 11.2.1 TOOLBAR BUTTONS Starts the s
Page 108 and 109: Stepped is also not checked. Typica
Page 110 and 111: 11.3 A BRIEF DESCRIPTION ON SETTING
Page 112 and 113: 11.3.3 GATING Enabling Gating allow
Page 114 and 115: 11.4 DISTORTION AND SETTINGS Sinuso
Page 116 and 117: Finally Fig.11.12 shows the distort
Page 118 and 119: 12.3 WATERFALL BASICS Figure 12.2 W
Page 120 and 121: 12.4 MAKING A CUMULATIVE SPECTRAL D
Page 122 and 123: Let's now change the CSD aspect aga
Page 124 and 125: Figure 12.11 12.5.3 TAKING THE MEAS
Page 126 and 127: Figure 12.17 The final result for o
Page 128 and 129: If you are novice in using CLIO or
Page 132 and 133: 13.4 I SENSE Requires Audiomatica C
Page 134 and 135: Figure 13.12 Lets proceed now with
Page 136 and 137: The figure shows us we are going to
Page 138 and 139: 13.7 THIELE & SMALL PARAMETERS 13.7
Page 140 and 141: L 1kHz L 10kHz Inductance at 10kHz
Page 142 and 143: Now we can save our complete result
Page 144: [19] M.O. Hawksford, “Digital Sig
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CLIOwin 6.5 PCI User's Manual - Audiomatica Srl

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