Asked by Ariana
Q11
a(ii)A sinusoidal carrier wave has frequency 500 kHz and amplitude 6.0 V. It is to be
frequency modulated by a sinusoidal wave of frequency 8 kHz and amplitude 1.5 V.
The frequency deviation of the carrier wave is 20 kHz V^–1
Describe, for the carrier wave, the variation (if any) of
1. the amplitude,
2. the frequency.
Answer:
1. Amplitude does not vary (I got this)
2. Upper limit 530kHz (I assume they got this by using 20kHz/V x 1.5V??)
Lower limit 470kHz
Changes from lower to higer and to lower limit at 8000 per second (I'm not sure how they got 8000/s??)
Please help?
Thankkkkkks :)
a(ii)A sinusoidal carrier wave has frequency 500 kHz and amplitude 6.0 V. It is to be
frequency modulated by a sinusoidal wave of frequency 8 kHz and amplitude 1.5 V.
The frequency deviation of the carrier wave is 20 kHz V^–1
Describe, for the carrier wave, the variation (if any) of
1. the amplitude,
2. the frequency.
Answer:
1. Amplitude does not vary (I got this)
2. Upper limit 530kHz (I assume they got this by using 20kHz/V x 1.5V??)
Lower limit 470kHz
Changes from lower to higer and to lower limit at 8000 per second (I'm not sure how they got 8000/s??)
Please help?
Thankkkkkks :)
Answers
Answered by
Moid
The frequency of the wave by which the carrier wave is going to be modulated is 8KHz that's why it'll vary 8000 times per second
Answered by
Nonhle Mthembu
L.O interview question about the service delivery protest
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