Question
On which of the following bands is phone operation prohibited?
Answer Options
- A) 160 meters
- B) 30 meters
- C) 17 meters
- D) 12 meters
Correct Answer: B
Explanation
FCC Rule \S 97.305 specifies the authorized emission types on each frequency band. The 30\text{-meter} band, covering 10.100 \text{MHz} to 10.150 \text{MHz}, is designated for narrow-band digital and CW (Morse code) operation only. Phone (voice) emissions, regardless of the sideband used, are prohibited entirely from this band for all US amateurs.
This restriction exists because the 30\text{-meter} band is a small, internationally allocated segment where the amateur service is a secondary user in most countries. By limiting amateur operations to narrow-band modes, the FCC helps to minimize interference to the primary users of this spectrum, which is a requirement for the amateur service in a secondary allocation.
This topic was automatically created to facilitate community discussion about this exam question. Feel free to share study tips, memory tricks, or additional explanations!