Standard IF in FM receivers

The standard value for Intermediate frequency (IF) in double conversion FM receivers is

Options:

a) 455 KHz
b) 580KHz
c) 10.7 MHz
d) 50 MHz

Correct Answer: c.) 10.7 MHz

Explanation:

Intermediate frequency (IF) is a frequency at which the received carrier frequency is shifted for detection of message signal. The IF is generated by mixing the received carrier with the locally generated signal. The IF is generated and is shifted to further amplifiers and detectors for amplification and detection of message signal respectively. In double-conversion super heterodyne receivers, an intermediate frequency of 10.7 MHz is used, and then a second intermediate frequency of 470 kHz is used.