Question 1

FFT of a time-domain signal would give

Accepted Answer

A)   magnitude only
B)   phase only
C)   both magnitude and phase
D)   signal to noise ratio C

Question 2

Lock-in amplifiers can be used to simultaneously obtain all harmonics.

Accepted Answer

A) True 
 B)False  False

Question 3

Impedance can be measured using

Accepted Answer

A)   Oscilloscope
B)   Lock-in amplifier
C)   FFT analyzer
D)   all of the above D

Question 4

Faraday cage is used to

Accepted Answer

A)   minimize the nonlinearity effects
B)   decrease measurement time
C)   minimize the effect of external noise
D)   minimize the instabilities

Question 5

The main purpose of using multi-sine instead of single sine is to ensure

Accepted Answer

A)   linearity
B)   causality
C)   stability
D)   shorter measurement time

Exam 2: Experimental Aspects

FFT of a time-domain signal would give