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Question
A bandwidth of 6 MHz is available for AM transmission. If the maximum audio signal frequency used for modulating the carrier is not to be exceeds 64 KHz. How many stations can be broadcast within this band simultaneously without interfering with each other?
Options
1 × 106
2 × 104
5 × 105
4 × 103
MCQ
Solution
5 × 105
Explanation:
Bandwidth required for each station
= 2 × max. frequency of audio signal
= 2 × 64 = 128 KHz
Number of stations which can be broadcast with in band
width of 6 MHz = `(6 " MHz")/(128 " KHz") = (6 xx 10^6)/(128 xx 10^3) = 0.046 xx 10^3`
= 4.6 × 105 ≈ 5 × 105
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