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Information about Intermediate Frequency

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.

Commonly used intermediate frequencies ranges are as given below

Television

  • 30Mhz to 900MHz

FM radio

  • 5.5 MHz
  • 10.7 MHz

AM radio

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

Other

In some double superheterodyne receivers, first an intermediate frequency of 1.6MHz is used followed by a second intermediate frequency of 470kHz.
FreQuency is a music video game developed by Harmonix and published by SCEI. It was released in November 2001. A sequel, titled Amplitude was released in 2003.
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Carrier frequency is a term used to designate:
  • The nominal frequency of a carrier wave
  • The center frequency of a frequency modulation signal
  • The frequency of the unmodulated electrical wave at the output of an amplitude modulated (AM), frequency modulated (FM), or

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In telecommunications, transmission is the forwarding of signal traffic over distances that are too great to be simply connected by a twisted pair wires. Techniques available now may be microwave link, satellite link, coaxial cable or fibre optic cable.
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Reception is a noun form of receiving, or to receive something, such as information, art, experience, or people. It is often used in the following contexts:

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In acoustics, a beat is an interference between two sounds of slightly different frequencies, perceived as periodic variations in volume whose rate is the difference between the two frequencies.
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A local oscillator is a device used to generate a signal which is beat against the signal of interest to mix it to a different frequency. The oscillator produces a signal which is injected into the mixer along with the signal from the antenna in order to effectively change the
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In electronics, the superheterodyne receiver (also known by its full name, the supersonic heterodyne receiver, or by the abbreviated form superhet) is a technique for selectively recovering the information from radio waves of a particular frequency.
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amplifier is any device that will use a small amount of energy and convert it to a larger amount of energy. In popular use, the term today usually refers to an electronic amplifier, often as in audio applications.
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In general, detection is the extraction of intelligence from a carrier signal in a communication system. Note that this may be either an overt signal, as in a conventional radio broadcast, or a covert signal, as in steganography.
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A radio receiver is an electronic circuit that receives its input from an antenna, uses electronic filters to separate a wanted radio signal from all other signals picked up by this antenna, amplifies it to a level suitable for further processing, and finally converts through
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