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G2A07

OPERATING PROCEDURES · - Phone operating procedures: USB/LSB conventions, breaking into a contact, transmitter setup for voice operation; answering DX stations

G2A07G2A →

Which of the following statements is true of single sideband (SSB)?

  1. AOnly one sideband and the carrier are transmitted; the other sideband is suppressed
  2. BOnly one sideband is transmitted; the other sideband and carrier are suppressed
  3. CSSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands
  4. DSSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands
Why SSB is a form of amplitude modulation in which the balanced modulator removes the carrier and a filter (or phasing network) removes one of the two redundant sidebands, so all transmitter power goes into the single remaining sideband carrying the voice information. That makes it roughly a third the bandwidth of full AM (about 3 kHz versus 6 kHz) and far more power efficient, since no energy is wasted on a carrier that carries no information. Both sidebands contain the same audio, so discarding one loses nothing.
Watch out The choice that keeps the carrier describes single sideband with reduced or full carrier, which is not standard amateur SSB; ordinary double sideband AM keeps the carrier and both sidebands. The choices about SSB being the only authorized voice mode are simply false, since AM, FM, and digital voice are also permitted on HF phone segments.
SSB = Suppress carrier, Suppress one Sideband. One sideband survives, that's all.
HamSandwich explanation, first draft. The question and answers are the NCVEC text.
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The rest of G2A

  1. G2A01 Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?
  2. G2A02 Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?
  3. G2A03 Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?
  4. G2A04 Which mode is most commonly used for voice communications on the 17- and 12-meter bands?
  5. G2A05 Which mode of voice communication is most commonly used on the HF amateur bands?
  6. G2A06 Which of the following is an advantage of using single sideband, as compared to other analog voice modes on t…
  7. G2A07 Which of the following statements is true of single sideband (SSB)?
  8. G2A08 What is the recommended way to break into a phone contact?
  9. G2A09 Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?
  10. G2A10 Which of the following statements is true of VOX operation versus PTT operation?
  11. G2A11 Generally, who should respond to a station in the contiguous 48 states calling "CQ DX"?
  12. G2A12 What control is typically adjusted for proper ALC setting on a single sideband transceiver?
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