BasicB-001-016-011
Based on the frequency stated and emission mode, which of the following combinations is prohibited?
C
Answer
Regulations and administration
Type
A
Frequency modulation (FM) on 29.6 MHz
B
Morse radiotelegraphy (CW) on 10.11 MHz
C
Single sideband (SSB) on 10.12 MHz
D
FT8 on 10.136 MHz
Answer Notes
The 30-meter band (10.100 to 10.150 MHz) is unique in amateur radio because it is strictly allocated for narrowband modes only. This includes Morse radiotelegraphy (CW) and digital data modes like FT8 or RTTY.
Voice modes, such as Single Sideband (SSB), Amplitude Modulation (AM), and Frequency Modulation (FM), are entirely prohibited on the 30-meter band worldwide to prevent them from overpowering the narrowband signals.
Because the other options represent legal operating combinations in their respective bands, choosing SSB on the 10 MHz (30m) band is the correct answer for a prohibited combination.
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Based on the frequency stated and emission mode, which of the following combinations is prohibited?
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What transmitter power should Canadian amateur radio operators use at all times?