SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/hamg-g8b06

What is the total bandwidth of an FM phone signal with 5 kHz deviation and a 3 kHz modulating frequency?

16 kHz.

Start playing free

  1. 5 kHz
  2. 8 kHz
  3. 16 kHz ✔

Why: FM bandwidth is about twice the sum of the deviation and the modulating frequency. Twice (5 plus 3) is 16 kHz.

Huh, didn't know that: Higher symbol rates require wider bandwidth.

The dad joke
You know you're a ham when, in conversation, you wait for the Roger tone before speaking.
Like this card?
Play the game

References

Answer: 16 kHz. FM bandwidth is about twice the sum of the deviation and the modulating frequency. Twice (5 plus 3) is 16 kHz.

  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
    16 kHz
    Checked 2026-10-11.

Think this answer is wrong? Tap "Challenge this answer" on the card in the game and tell us why.

Test yourself in the game

Ham RadioWhat is the maximum bandwidth for a USB signal on 60 meters?Ham RadioHow many watts does an 800-ohm load consume when it is supplied with 400 volts DC?Ham RadioWhat is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

That's stuff everyone should know.