CLIOwin 6.5 PCI User's Manual - Audiomatica Srl

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11.3 A BRIEF DESCRIPTION ON SETTINGS EFFECTS 11.3.1 STEPPED VS. NOT STEPPED Although Measuring speed increases, use of a not stepped sweep can adversely affect measuring results in several circumstances. As an example that should make clear also other situation, let’s see what happens measuring the impedance of a woofer in Internal or Constant Current Mode. Please refer to Measuring Impedance for more information on this topic. In both conditions the loudspeaker is driven from a high impedance source and its damping is only mechanical. Fig.11.1 shows a 6" woofer, driven by a 100Ohm output impedance generator delivering a sinusoidal burst 200ms long, at its resonance frequency. When the excitation stops, the device continues to move, and therefore produce back electromotive force voltage for more than 50 ms. Something very similar happens at start-up. In this situation, if CLIO is set in not stepped mode, it will acquire the previously played frequency together with the actual. 0.200 CLIO V 0.120 0.040 -0.040 -0.120 -0.200 0.00 50 100 150 200 250 300 350 400 ms 450 500 Figure 11.1 Fig.11.2 shows the same driver impedance taken both in stepped (black) and not stepped mode (red). The not stepped curve is simply wrong. Conclusion: use always stepped mode if the behaviour of the device to be measured is unknown. 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 10 100 1k Hz 10k 20k Figure 11.2 110 Chapter 11 - Sinusoidal
11.3.2 FREQUENCY RESOLUTION Here the lowest resolution the fastest is the measuring time. Impedance measurements are again a powerful setup to exploit problems. Fig.11.3 shows two impedance taken from the same 16" woofer with 1/24 octave resolution (red) and 1/6 octave resolution (black). Deriving T/S Parameters from the black curve would lead to serious errors. This is an extreme case, a huge woofer with high Qms. Different curve shapes can be accurately quantified even with 1/3 octave resolution. 150.0 CLIO 180.0 Ohm Deg 120.0 108.0 90.0 36.0 60.0 -36.0 30.0 -108.0 0.0 -180.0 10 100 Hz Figure 11.3 Chapter 11 - Sinusoidal 111
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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
Page 60 and 61: Enters the Notes dialog where it is
Page 62 and 63: 6.3.5 CALIBRATION File > Calibratio
Page 64 and 65: 6.3.7 STARTUP OPTIONS AND GLOBAL SE
Page 66 and 67: 7.3 BUTTONS AND CHECKBOXES Moves (s
Page 68 and 69: 7.6 THE MLS TIME DOMAIN DISPLAY Whe
Page 70 and 71: 8.2.1 TOOLBAR BUTTONS Starts the me
Page 72 and 73: This operating mode is very useful;
Page 74 and 75: Figure 8.7 With the Multi-meter run
Page 76 and 77: 76 Chapter 8 - Multi-Meter
Page 78 and 79: 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 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 130 and 131: -10.0 CLIO dBV -30.0 -50.0 -70.0 -9
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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