Intermediate frequency

From Wikipedia, the free encyclopedia

An intermediate frequency (IF) is a frequency to which a carrier frequency is shifted as an intermediate step in transmission or reception. It is the beat frequency between the signal and the local oscillator in a radio detection system. IF is also the name of a stage in a superheterodyne receiver. It is where an incoming signal is amplified before final detection is done. There may be several such stages in a superheterodyne radio receiver.

Contents

1 Commonly Used Frequencies

35-45 MHz

5.5 MHz
10.7 MHz

455 kHz
460 kHz
465 kHz
470 kHz
475 kHz
480 kHz

In some double superheterodyne receivers, first an intermediate frequency of 1.6MHz is used followed by a second intermediate frequency of 470kHz.

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Categories: Radio electronics | Broadcast engineering

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