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Communication Systems - Engineering

Q1:

A telephone channel requires a bandwidth of about

A 1 kHz

B 3 kHz

C 10 kHz

D 50 kHz

ANS:B - 3 kHz

For example, the bandwidth allocation of a telephone voice grade channel, which is classified as narrowband, is normally about 4,000 Hz, but the voice channel actually uses frequencies from 300 to 3,400 Hz, yielding a bandwidth that is 3,100 Hz wide.