frequency variation

frequency variation

[¦frē·kwən·sē ‚ver·ē¦ā·shən]
(electronics)
The change over time of the deviation from assigned frequency of a radio-frequency carrier (or power supply system); usually tightly controlled because of national or industry standards.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
An explanatory discussion on applicability follows in Section 3 in terms of the type of transmission (narrowband or wideband) and frequency variation of the medium, along with an evaluative outline of the comparative novel assets of this travelling-wave approach and the resulting exploitation prospects.
The frequency variation obtained with the two proposed approaches has been studied.
The rotation speed of the asynchronous motors at the present time is most often controlled by frequency variation. In this way a very wide speed regulation range, high uniformity of the regulation under changing loads, high speed stability, high efficiency of the electric drive operation and also the reversibility of the speed regulation in respect of the indicated speed are obtained.
Using mixed-signal analog circuitry, it is compensated for frequency variation due to operating temperature range, initial frequency accuracy, supply voltage change and output load change.
Loose coupling to the load allows some immunity against frequency variation with changes in load impedance.
Typical frequency variation is usually [+ or -] 10% from nominal.
A direct assessment of the role of genetic drift in determining allele frequency variation in populations of Euphydryas editha.
The FM sensitivity of the receiver is important from the point of view of measuring the fine-grain frequency variation in the intrapulse characteristic.
In addition, to assess the variation in the operating frequency when the diode is ON, we analyzed the frequency variation according to [L.sub.5], and the corresponding results are listed in Table 2.
With a better sensitivity, a sensor has a larger resonant frequency variation for a given IOP variation.
Therefore, the experiment for the temperature effect on the sensor was limited to the consideration of the natural frequency variation of the sensor.

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