
200 Make: Radio
it’s shaped like a triangle.) The amplitude-modulated version of this signal
has one such side band on either side of the carrier frequency. The two
side bands contain the same information. The idea in single-side-band
modulation is to transmit only the frequencies in one of the side bands. One
way to do this is to filter out the carrier frequency and one of the side bands
from an AM signal. "Upper-side-band modulation" and "lower-side-band
modulation," abbreviated as USB and LSB, refer to which side band is kept.
One drawback with SSB is that it cannot be received with the simple
receivers you built in earlier experiments. It ...