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SESK: Stuff Everyone Should Know · sesk.info/hamg-g8a07

Which of these phone emissions uses the narrowest bandwidth?

Single sideband.

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  1. Single sideband ✔
  2. Phase modulation
  3. Frequency modulation

Why: SSB sends just one sideband, so it takes the least bandwidth of these phone emissions. Phase and frequency modulation use more.

Huh, didn't know that: A balanced modulator produces double-sideband RF, and a filter then selects one sideband.

The dad joke
SSB hams are thrifty. Why pay for two sidebands when one will do?
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References

Answer: Single sideband. SSB sends just one sideband, so it takes the least bandwidth of these phone emissions. Phase and frequency modulation use more.

  1. NCVEC 2023-2027 General Class Pool and Syllabus (6th Errata, Feb 4 2026) ncvec.org/downloads/General%20Class%20Pool%20and%20Syllabus%202023-2027%20Public%20Release%20with%206th%20Errata%20Feb%204%202026.pdf
    Single sideband
    Checked 2026-10-11.

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