n. a band of adjacent radio frequencies (e.g., assigned for transmitting radio or television signals) [syn: waveband]
A frequency band is an interval in the frequency domain, delimited by a lower frequency and an upper frequency. The term may refer to a radio band or an interval of some other spectrum.
The frequency range of a system is the range over which it is considered to provide satisfactory performance, such as a useful level of signal with acceptable distortion characteristics. A listing of the upper and lower limits of frequency limits for a system is not useful without a criterion for what the range represents.
Many systems are characterized by the range of frequencies to which they respond. Musical instruments produce different ranges of notes within the hearing range. The electromagnetic spectrum can be divided into many different ranges such as visible light, infrared or ultraviolet radiation, radio waves, X-rays and so on, and each of these ranges can in turn be divided into smaller ranges. A radio communications signal must occupy a range of frequencies carrying most of its energy, called its bandwidth. A frequency band may represent one communication channel or be subdivided into many. Allocation of radio frequency ranges to different uses is a major function of radio spectrum allocation.
Usage examples of "frequency band".
Her threat display was now a solid sheet of white--every frequency band that was possible to be displayed was filled with endless waves of energy.
We instituted a test similar to what the Soviets had done on their ice floe station, which recorded at Alert instances when signals in this frequency band could be received.
It's as if someone told you that there's only one station on your home radio set's frequency band, but that no one knows its frequency.
There were now two dotted lines, one in the sixty-hertz frequency portion of the display, another on a higher-frequency band.
But the frequency band is being increasingly encroached upon by civilian and military communications traffic on Earth, and not only by the major powers.
Loren selected the ultra high frequency band and dialed the frequency.
The very low-frequency band, broadcast at between 3 and 30 kilohertz, could only penetrate the top fifty feet or so of the ocean.
He tried every frequency band, but across all of them, the storm reigned.
Tornados create an electrical disturbance somewhere in the 55 megahertz range, close to the frequency band assigned to channel 2.
He also sent it uncoded in clearly sharp Morse signals, using the prescribed hyper-frequency band assigned to commercial channels.
He set the controls of his staff for maximum range in the primary Ledbetter effect, checked to see that the frequency band covered the Mongolian race, and adjusted it to stun rather than kill.
As an object gets hotter, the peak of the frequency band that it radiates (where most of the radiated energy is emitted) shifts toward shorter wavelengths.
I've reconfigured for every frequency band, every type of available modulation.