intermediate frequency

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intermediate frequency

[‚in·tər′mēd·ē·ət ′frē·kwən·sē]
The frequency produced by combining the received signal with that of the local oscillator in a superheterodyne receiver. Abbreviated i-f.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

intermediate frequency (IF)

In superheterodyne receivers, a frequency resulting from the combination of the received modulated carrier frequency and the locally generated oscillator frequency. An intermediate frequency is so called because it lies between the modulated radio frequency and the audio frequency.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
At intermediate frequencies, this curve should be a straight line with a slope of-1.
Polymorphic RAPD markers were generally found at intermediate frequencies within populations of E.
A second class of minima occurs when an allele is fixed at one locus and alleles at the other locus are at intermediate frequencies ([V.sub.a] = 0.000; [V.sub.d] = 0.063; [V.sub.i] = 0.000).
Local maxima also occur when an allele is fixed at locus A and at intermediate frequencies at locus B ([V.sub.a] = 0.042; [V.sub.d] = 0.000; [V.sub.i] = 0.000).
Richness should be highest at intermediate frequencies of disturbance when conditions favor competitive species and those that tolerate disturbance.
First, we test the intermediate disturbance hypothesis that species richness will peak at intermediate frequencies of burning and/or intermediate time after burning.
Thus, the results of both long-term field experiments directly contradict the first prediction of the intermediate disturbance hypothesis that richness is maximum at intermediate frequencies of disturbance.
It operates from 40 to 300 MHz, covering typical 2G/35 wireless intermediate frequencies and provides 40 dB of gain control, with low amplitude and phase error of the demodulated inputs ([less than] 0.1 dB (typ), [less than] 1[degrees], respectively).
The focus of this book is in the processing of signals derived from active array systems at their RF and intermediate frequencies, as opposed to earlier books that concentrate on signal processing at baseband.
For lower intermediate frequencies, such as 450 kHz in a narrow-band FM application, the AD608 requires a simple one-pole RC lowpass filter on the RSSI output.

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