What is the purpose of the receiver IF Shift control?
To permit listening on a different frequency from the transmitting frequency
To change frequency rapidly
To reduce interference from stations transmitting on adjacent frequencies✓Bonne réponse
To tune in stations slightly off frequency without changing the transmit frequency
Explication
The IF shift control moves the IF passband relative to the received signal, so an interfering station just off frequency can be pushed outside the passband while the wanted signal stays inside it and its audio pitch is unchanged. Tuning in an off-frequency station without moving the transmit frequency is what a receiver incremental tuning control does.