User`s manual
Table Of Contents
- CONTENTS
- 1 INTRODUCTION
- 2 THE CLIO SYSTEM
- 3 CLIO INSTALLATION
- 3.1 MINIMUM PC CONFIGURATION
- 3.2 FW-01 DRIVERS INSTALLATION UNDER WINDOWS XP
- 3.3 FW-01 DRIVERS INSTALLATION UNDER WINDOWS VISTA AND 7
- 3.4 SOFTWARE INSTALLATION
- 3.5 THE 'CLIO BOX'
- 3.6 RUNNING CLIO FOR THE FIRST TIME
- 3.7 SYSTEM CALIBRATION
- 3.8 CLIO SERIAL NUMBER AND DEMO MODE
- 3.9 TROUBLESHOOTING CLIO INSTALLATION
- 4 CLIO BASICS
- 5 SYSTEM OPERATIONS AND SETTINGS
- 6 COMMON MEASUREMENT INTERFACE
- 7 SIGNAL GENERATOR
- 8 MULTI-METER
- 9 FFT, RTA AND “LIVE” TRANSFER FUNCTION
- 10 MLS & LOG CHIRP
- 11 SINUSOIDAL
- 12 WATERFALL , DIRECTIVITY & 3D
- 12.1 INTRODUCTION
- 12.2 WATERFALL, DIRECTIVITY & 3D CONTROL PANEL
- 12.3 WATERFALL SPECIFIC CONTROLS
- 12.4 MAKING A CUMULATIVE SPECTRAL DECAY
- 12.5 DIRECTIVITY SPECIFIC CONTROLS
- 12.6 MEASURING LOUDSPEAKER SINGLE POLAR DATA (1D MODE)
- 12.7 REPRESENTING SINGLE POLAR DATA
- 12.8 3D SPECIFIC CONTROLS
- 12.9 MEASURING LOUDSPEAKER SINGLE POLAR DATA (3D MODE)
- 12.10 MEASURING FULL SPHERE LOUDSPEAKER POLAR DATA (3D MODE)
- 12.11 REPRESENTING 3D BALLOON DATA
- 12.12 EXPORT 3D BALLOON DATA
- 13 MEASURING IMPEDANCE AND T&S PARAMETERS
- 14 LINEARITY & DISTORTION
- 15 ACOUSTICAL PARAMETERS
- 16 Leq LEVEL ANALYSIS
- 17 WOW AND FLUTTER
- 18 WAVELET ANALYSIS
- BIBLIOGRAPHY
- NORMS
8.3 USING THE MULTI-METER
The first application of the Multi-meter has been described in section 3.4.1 when
CLIO was started for the first time. This was a simple generation of a 1kHz sinusoid
(0dBu output level) and relative level capture with the Multi-meter. You can
continue the measurement described to familiarize yourself with the instrument.
Pressing the magnifier will let you inspect all the parameters that the Multi-meter
measures in parallel (Fig.8.1); changing the selected parameter will bring it to the
foreground; for any parameter it is possible to choose different units, for example
THD can be shown in percentage or in dB; then you can select the input channel
and the integration. This last parameter (integration) affects the measurement
rate, since the integration fast assumes 125ms of exponential averaging while the
integration slow assumes 1s of exponential averaging. The program approximates
these constants trying to measure the computer speed and varying the number of
averages calculated.
The rest of the paragraph deals with other applications of the Multi-meter.
8.3.1 THE MINIMIZED STATE
It is possible to operate the Multi-meter in what we call a 'minimized' state.
Pressing the relative button the control panel collapses and, in its place, remains a
stay-on-the-top display as in Fig.8.2.
Figure 8.2
This operating mode is very useful; for example suppose you want to measure the
total harmonic distortion of a sinusoidal signal while also displaying its frequency
content. To do this lets start the FFT and Multi-meter control panels together; then
press the Go button in FFT, this will start both measurements (see also 8.6 about
this); inside the Multi-meter select the THD parameter and then press the
minimized button. You should obtain a measurement situation like the one in
Fig.8.3. In this figure we were directly acquiring the output of CLIO while
generating a 1kHz sinusoid at 0dBu.
Figure 8.3
8.3.2 CAPTURING THE GLOBAL REFERENCE LEVEL
Now let's see how to capture a level to be the reference for other measurements.
Once this is done all subsequent measurements from within the instruments can be
referenced to this by choosing dBREL as the unit of measurement. As an example,
8 MULTI-METER 93