Discussion
A message occupies \( 300 \ \mathrm{Hz} \) to \( 3400 \ \mathrm{Hz} \). An SSB signal carrying it occupies
Answer: B
Single sideband occupies just the message band:
\[ B = 3400 - 300 = 3100 \ \mathrm{Hz} \]
so 3100 Hz, and the channel spacing on the high-frequency bands is set accordingly. 6800 Hz is the double-sideband figure, twice the highest message frequency. 3400 Hz is the upper message limit rather than the width. And 6200 Hz doubles the message bandwidth, which is the width DSB would occupy if the message truly began at 300 Hz and the sidebands were measured from the carrier.
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