CLIOwin 6.5 PCI User's Manual - Audiomatica Srl

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12.3 WATERFALL BASICS Figure 12.2 Within the waterfall settings dialog (Fig. 12.2) it is possible to configure many waterfall parameters. But, since the calculation relies on externally available data, it also captures some settings from the data source itself. When executing CSD and ETF waterfalls the data source is the MLS control panel, when displaying files the data source is, obviously, the set of files. It is possible to save and load from disk executed waterfalls. One automatic setting is Y scaling. The waterfall amplitude scale is always dB relative; the routine try to evaluate the maximum value within all the data to be represented and references all other values to this. The first setting encountered is Mode that selects between the available modes: CSD, ETF and File. Follow a basic introduction to the three different modes. 12.3.1 CSD AND ETF MODES SETTINGS AND OPERATION Number of Spectra Selects the number of data slices to display. Time Shift (ms) Selects the time between two consecutive spectra. Window Rise Time (ms) Selects the rise time of the data selecting window. Valid only for CSD. Reference If checked the waterfall spectra will be reference to the rearmost one. As already said, the data source for a CSD or ETF waterfall is the MLS control panel; when in these modes, the Go button becomes active only if there is an MLS measurement active, i.e.just executed or loaded from disk. The waterfall captures the following MLS settings: frequency range, if MLS has a zoomed curve than waterfall will take the selected zoom as frequency range to display; smoothing, the current MLS smoothing factor is also applied to the calculated data slices; start time, the Start Window value selected in the MLS impulse response represents time zero for the waterfall; stop time, the Stop Window value selected in the MLS impulse response represents the last processed CSD slice unless a different Time Shift has been selected. You can interactively switch between the MLS and Waterfall control panels to change the MLS settings that affect waterfall. CSD (Cumulative Spectral Decay) is intended primarily for anechoic loudspeaker 118 Chapter 12 - Waterfall
evaluation; in this case only the data between the start and stop time is analyzed; each successive slice considers time data from its relative start time (the rearmost, at time zero, has start time equal to the start window of MLS) to the fixed stop time, the data being windowed by a particular time window with a smoothed rising edge (see literature for a discussion about this). Normal values for the Window Rise Time lie within 0.1 and 0.6ms. In CSD mode, should the Time Shift value be left at zero, the routine will automatically calculate it, spacing the selected Number of Spectra in the interval defined by start and stop times; if Time Shift is forced by the user be sure to set it small enough to permit the last spectra to be calculated; if the fixed stop time is passed, then the calculation defaults as in case of zero Time Shift. When representing a CSD the program automatically hides the low frequency part of the spectra that has become unreliable due to the time-frequency uncertainty principle. ETF (Energy Time Frequency) is intended for room acoustic evaluation; in this case all MLS data starting from the start time are computed; then, successive slices are calculated moving their initial point of the Time Shift value. 12.3.2 FILE DISPLAY MODE SETTINGS AND OPERATION Root File Name and browse button Name of one file within the set to be displayed. Pressing the associated button it is possible to browse the disk and choose the file. Z-Start Value associated to the first (rearmost) file. Z-Stop Value associated to the first (foremost) file. Z-Ref Value associated to the file to be taken as reference. Start Frequency Start frequency of the waterfall. Stop Frequency Stop frequency of the waterfall. File display mode is a powerful way for synthesizing a large number of measurements in a single 3-D graph. This mode allow the representation of the polar response of a loudspeaker taken as successive frequency responses saved in files. In order to identify the set of files it is important that all of their names follow a particular syntax, that give certain information to the processing routines. The syntax follows: .MLS. NAME is a common file name, UNITS are the common measurement units (to be displayed in the graph as Z axis label) and VALUE is a unique value identifying the single file; these quantities needs to be separated by spaces, it is possible to give negative numbers to VALUE. For example 'mydriver deg -250.mls' is a valid file name: as the name tells it is a measurement named mydriver with units deg taken at -2.5 (250 divided by 100) units value. It is possible to identify one file within the set as reference with the Z-ref value; all calculations will then be made referenced to it. Please refer to 12.5 for an example. Chapter 12 - Waterfall 119
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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
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 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 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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