NF FRA51615, Instruction Manual

Page: 19 / 306

1.2 Applications
1
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5
FRA 51615
■ Example of impedance characteristic measurement
The impedance of the DUT can be measured by using this instrument to measure the voltage (v) with CH1
and the current (i) with CH2, and calculating the impedance by taking the vector ratio of CH1 and CH2.
The current of the DUT (i) is converted to a voltage with a shunt resistance, current probe, or CT, etc., and
the voltage is input to CH2.
Figure 1-3 Example of impedance characteristic measurement
It is possible to measure the impedance of the DUT at high voltage or large current by amplification of the
output of the sweep oscillator with the power amplifier as needed. This instrument differs from LCR meters,
impedance analyzers, and other such devices that limit the signal level to less than 1 V in that measurement
is possible under the signal amplitude conditions actually used by the EUT, thus enabling evaluation of
materials that handle high energy levels, such as magnets and dielectrics.
v
POWER AMPLIFIER
(OPTION)
i
CT
CH2
OSC CH1
Z=v/i=V1/V2 x K
CT
( K
CT
=V2/i )
V1
V2
DUT
(Z)