Question
Which of the following is a form of amplitude modulation?
Answer Options
- A) Spread spectrum
- B) Packet radio
- C) Single sideband
- D) Phase shift keying (PSK)
Correct Answer: C
Explanation
Modulation is the process of combining an information signal (like voice or data) with an RF carrier signal (T7A08). Amplitude Modulation (AM) changes the strength (amplitude) of the carrier wave in proportion to the audio signal being transmitted. Single Sideband (SSB) is a highly efficient form of AM.
Single Sideband (SSB) works by transmitting only the information contained in one of the sidebands (upper or lower) and suppressing the carrier wave and the other sideband. This makes it much more power-efficient and narrow in bandwidth (T8A07) than full AM, making it the dominant voice mode on HF bands and for weak-signal work on VHF/UHF (T8A03).
This topic was automatically created to facilitate community discussion about this exam question. Feel free to share study tips, memory tricks, or additional explanations!