Question
May an Extra class operator answer the CQ of a station on 3.601 MHz LSB phone?
Answer Options
- A) Yes, the entire signal will be inside the SSB allocation for Extra class operators
- B) Yes, the displayed frequency is within the 75-meter phone band segment
- C) No, the sideband components will extend beyond the edge of the phone band segment
- D) No, US stations are not permitted to use phone emissions below 3.610 MHz
Correct Answer: C
Explanation
The Extra class phone segment on the 80-meter band begins at 3.600 MHz. This question asks about an LSB (Lower SideBand) transmission at a displayed carrier frequency of 3.601 MHz. A standard phone signal is approximately 3 kHz wide, meaning the signal’s energy would extend from the carrier frequency down to 3.601 MHz - 0.003 MHz = 3.598 MHz.
The Extra class phone allocation technically starts at 3.600 MHz. Therefore, the signal components (sidebands) extending below 3.600 MHz are outside the authorized phone segment, making the transmission illegal. This emphasizes that operators must ensure their entire transmitted signal, including all sidebands, falls within their authorized frequency privileges.
This topic was automatically created to facilitate community discussion about this exam question. Feel free to share study tips, memory tricks, or additional explanations!