Why is it not legal to transmit a 3 kHz bandwidth USB signal with a carrier frequency of 14.348 MHz?
AnswerThe upper 1 kHz of the signal is outside the 20-meter band
A 3 kHz-wide USB signal extends upward from the displayed carrier frequency. With the carrier at 14.348 MHz, the upper portion of the emission extends beyond the 14.350 MHz band edge.