What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?
Why In upper sideband the transmitter suppresses the carrier and transmits only the sideband above the displayed carrier (dial) frequency. A 3 kHz wide audio passband therefore puts energy from the dial frequency up to 3 kHz higher: 14.347 MHz + 0.003 MHz = 14.350 MHz. That happens to land exactly on the top edge of the 20 meter band, so 14.347 MHz is the highest dial setting you can legally use for a 3 kHz USB signal there.
Watch out The range running 3 kHz below the dial frequency describes an LSB signal, where the emitted energy falls under the displayed carrier frequency instead of above it.
USB goes Up, LSB goes Lower. Dial + 3 kHz on USB, dial - 3 kHz on LSB; keep the far edge inside the band.