Which of the following is a common use of the dual-VFO feature on a transceiver?
To allow transmitting on two frequencies at once
To permit full duplex operation -- that is, transmitting and receiving at the same time
To transmit on one frequency and listen on another✓Bonne réponse
To improve frequency accuracy by allowing variable frequency output (VFO) operation
Explication
Two independent variable frequency oscillators let the transmit frequency and the receive frequency be set separately, which is split operation and is how a DX station working a pileup is answered. The transceiver still transmits on only one frequency at a time and does not become full duplex.