Ex 4-2: Find the modulation index and modulation depth if a carrier signal given by 8 cos 2n * 105t is modulated by the signal shown below using AM/DSB-LC technique. f(t) Solution: Ac = 8 v f(t)min = -6 v 6v 3*10*v -f(t)min 0.75 m = 10*v 4 10 v .... D = m x 100% -0.75% -6v The modulated signal waveform may be plotted as shown: ФАм (1) A. 14 2 -A. -2 -8 -14
Ex 4-2: Find the modulation index and modulation depth if a carrier signal given by 8 cos 2n * 105t is modulated by the signal shown below using AM/DSB-LC technique. f(t) Solution: Ac = 8 v f(t)min = -6 v 6v 3*10*v -f(t)min 0.75 m = 10*v 4 10 v .... D = m x 100% -0.75% -6v The modulated signal waveform may be plotted as shown: ФАм (1) A. 14 2 -A. -2 -8 -14
Introductory Circuit Analysis (13th Edition)
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Question
a) Write the equation of the modulated wave in example 4-2.
b) sceteh the waveform of modulated write its equation if the modulation type is AM/DSB- SC.
![Ex 4-2:
Find the modulation index and modulation depth if a carrier signal given by
8 cos 27 * 105t is modulated by the signal shown below using AM/DSB-LC
technique.
f(1)
Solution:
Ac = 8 v
f (t)min = -6 v
6v
3*10*v
-f(t)min
0.75
m =
%3D
Ac
10ʻv
4 10"v
D = m x 100% =0.75%
-6v
The modulated signal waveform
may be plotted as shown:
ФАм (1)
A.
14
2
-A.
-8
-14](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F044bad96-3110-4ce0-88db-6f209c8fc6b0%2F302f05c0-9f90-4f19-b571-5b01042f29a1%2Fmsjzo8y_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Ex 4-2:
Find the modulation index and modulation depth if a carrier signal given by
8 cos 27 * 105t is modulated by the signal shown below using AM/DSB-LC
technique.
f(1)
Solution:
Ac = 8 v
f (t)min = -6 v
6v
3*10*v
-f(t)min
0.75
m =
%3D
Ac
10ʻv
4 10"v
D = m x 100% =0.75%
-6v
The modulated signal waveform
may be plotted as shown:
ФАм (1)
A.
14
2
-A.
-8
-14
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