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CLIOwin 6.5 PCI User's Manual - Audiomatica Srl

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Figure 13.12<br />

Lets proceed now with the device measurement. Connections need to be changed as<br />

in Fig. 13.13. We are going to measure now the voltage across Rs, which is proportional<br />

to the current in the device. Leaving anything in the Sinusoidal menu as it was for the<br />

previous measurement we obtain Fig.13.14. It seams a strange shape if you are not<br />

used to. But in fact we are measuring Current here and, Voltage being constant, it<br />

decreases at resonance.<br />

INPUT A<br />

CLIO<br />

INPUT B<br />

OUTPUT A<br />

OUTPUT B<br />

RS<br />

BLACK<br />

RED<br />

POWER AMPLIFIER<br />

Figure 13.11<br />

-10.0<br />

CLIO<br />

180.0<br />

dBV<br />

Deg<br />

-20.0 108.0<br />

-30.0 36.0<br />

-40.0 -36.0<br />

-50.0 -108.0<br />

-60.0 -180.0<br />

10 Hz<br />

100 1k 10k 20k<br />

Figure 13.14<br />

What we do from now on is just post processing. Leaving the last measure in memory,<br />

open the Processing Tools Dialog from within Sinusoidal (MLS has the same), select the<br />

CV icon and input the data you should know.<br />

The Ohm value is that of the Sensing Resistor while in the edit box you see the name<br />

of our previous file, cvreference.sin, added by its own path which could be different in<br />

your case.<br />

134 Chapter 13 - Measuring impedance and T&S parameters

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