What is IF (intermediate frequency)?

Intermediate frequency (IF) is a recurrence to which a transporter wave is moved as an intermediate step in transmission or reception. The intermediate frequency is made by combination of the carrier signal with a local oscillator signal. It can be amplified with higher gain and selectivity than the initial higher recurrence. The intermediate frequency receiver does not cause impedance. It should be shielded from different parts, computerized preparing, and advanced connections.