NF FRA51615, Instruction Manual

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1.2 Applications
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FRA 51615
1.2 Applications
This instrument features isolated input and output and highly-accurate measurement over a wide dynamic
range, enabling application in a variety of fields such as those listed below.
● Power electronics
Loop characteristic measurement of inverters, switching power
supplies, etc.
● Contactless power supplies
Frequency characteristic measurement of transmission coils and
driver amplifiers
● Servo systems
Servo characteristic measurement of optical disk drives, robots,
camera lens control systems, etc.
● Electronic circuits
Frequency characteristic measurement of filters, and amplifiers,
etc.
Loop characteristic measurement of DC-DC converters
● Electronic components
Frequency characteristic measurement of coils, capacitors, and
other electronic components
● Audio equipment
Frequency characteristic measurements of speakers, microphones,
etc.
● Vibration analysis
Measurement of resonance characteristics
■ Example of frequency response characteristic measurement
An example of measuring frequency response characteristics (gain-phase characteristics) for amplifiers,
filters, and other such circuits is illustrated in
Figure 1-1
. The setup includes the sweep oscillator (OSC),
the equipment under test (EUT), and two measurement channels (CH1 and CH2).
The gain and phase of the EUT are obtained by measuring the input voltage from CH2, measuring the
output voltage from CH1, and dividing the measured output voltage by the input voltage. By taking the
measurements while sweeping the OSC frequency, the frequency characteristic is obtained automatically
and displayed in graph form on the LCD of the instrument.
Figure 1-1 Example of gain-phase characteristic measurement
EUT
CH1 CH2 OSC