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In a 100% amplitude modulated signal, the power in the upper sideband when carrier power is to be 100 W and modulation system SSBSC, is
  • a)
    100 W
  • b)
    66 W
  • c)
    50 W
  • d)
    25 W
Correct answer is option 'D'. Can you explain this answer?
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In a 100% amplitude modulated signal, the power in the upper sideband ...
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In a 100% amplitude modulated signal, the power in the upper sideband ...
Answer:

Power in Upper Sideband of a 100% AM signal

In a 100% amplitude modulated signal, the power in the upper sideband is given by:

Pu = Pc/2 * ma^2

where,

Pu = Power in Upper Sideband
Pc = Carrier Power
ma = Modulation Index

Given,

Carrier Power (Pc) = 100 W
Modulation System = SSBSC (Single Sideband Suppressed Carrier)

In SSBSC modulation, only one of the sidebands is transmitted along with the carrier, and the other sideband and carrier are suppressed.

So, the power in the upper sideband will be:

Pu = Pc/2 * ma^2

Pc = 100 W
ma = 1 (for 100% AM)

Pu = 100/2 * 1^2
Pu = 50 W

Therefore, the power in the upper sideband of a 100% AM signal with a carrier power of 100 W and SSBSC modulation is 50 W.

Option (c) is incorrect because it is the power in both sidebands, not just the upper sideband. Option (b) is incorrect because it is too low. Option (a) is incorrect because it is the total power, including the carrier. Option (d) is correct because it is the power in the upper sideband only.
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Community Answer
In a 100% amplitude modulated signal, the power in the upper sideband ...
Upper side band or lower side band formula is
P(c)m^2/2..formula where m:1
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In a 100% amplitude modulated signal, the power in the upper sideband when carrier power is to be 100 W and modulation system SSBSC, isa)100 Wb)66 Wc)50 Wd)25 WCorrect answer is option 'D'. Can you explain this answer?
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