Technician 2026-2030T8A07
What is one characteristic of single sideband (SSB) compared to FM?
C
Answer
Signals, emissions, and modulation
Type
A
SSB signals are easier to tune in correctly
B
SSB signals are less susceptible to interference
C
SSB signals have narrower bandwidth
D
SSB signals are less susceptible to high SWR
Answer Notes
Single sideband (SSB) is a form of amplitude modulation where the carrier and one of the sidebands are suppressed. Because only one sideband is transmitted, it requires roughly half the bandwidth of a standard AM signal and significantly less than a standard FM voice signal.
This narrower bandwidth is a major advantage because it allows more signals to fit into a given segment of the band, and it makes the transmitter more power-efficient. In contrast, FM signals use much more bandwidth to provide clearer audio.
Distractors such as 'easier to tune' are incorrect because SSB actually requires very precise tuning (using a beat frequency oscillator) to make the voice sound natural. FM, on the other hand, is generally much easier to tune thanks to channelized frequencies and the capture effect.
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Which sideband is normally used for 10-meter HF, VHF, and UHF single-sideband communications?
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What is the approximate bandwidth of a typical single sideband (SSB) voice signal?