Q1.4

Question 1

what is the formula for odd harmonics

Answer 1

f(x) = (2x - 1) * Hz
eg 2Hz,
f (1) = (2(1) - 1) * 2 = 2Hz
f (2) = (2(2) - 1) * 2 = 6Hz
-
2Hz,6Hz,10Hz,14Hz…

Question 2

Oscilloscope signal is in which domain

Answer 2

time

Question 3

Oscilloscope x-axis and y-axis

Answer 3

x-axis is time
y-axis is voltage

Question 4

To construct a square wave of 5Hz, add sine waves of 5 Hz, ___ Hz, ____ Hz and ___ Hz of ____ amplitude.

Answer 4

15, 25, 35, different amplitude

Question 5

Signal in time domain allows us to view the _________ of signal, ______ the _________ of signal.

Answer 5

Signal in time domain allows us to view the WAVESHAPE of signal, NOT the FREQUENCY of signal.

Question 6

3 variables describing a signal

Answer 6

phase, frequency, amplitude

Question 7

Frequency domain plot CANNOT be _________ plot.

Answer 7

signal

Question 8

FFT converts signal from _______ domain to ________ domain for ________ signal.

Answer 8

FFT converts signal from TIME domain to FREQUENCY domain for APERIODIC signal.

Question 9

A square wave consists of its fundamental frequency and _________ harmonics with _______ amplitude.

Answer 9

A square wave consists of its fundamental frequency and ODD harmonics with DIFFERENT amplitude.

Question 10

convert signal from frequency domain to time domain

Answer 10

Fast Fourier Transform

Question 11

When filtering ________images, it is more important to preserve ______ data.

Answer 11

When filtering MOVING images, it is more important to preserve PHASE data.