The channel frequencies chosen represent a compromise between allowing enough bandwidth for video ( and hence satisfactory picture resolution ), and allowing enough channels to be packed into the available frequency band.

This range is in the globally unlicensed Industrial, Scientific and Medical ( ISM ) 2. 4 GHz short-range radio frequency band.

Bluetooth technology provides a way to exchange information between wireless devices such as personal digital assistants ( PDAs ), mobile phones, laptops, computers, printers and digital cameras via a secure, low-cost, globally available short-range radio frequency band.

A key characteristic of bandwidth is that a band of a given width can carry the same amount of information, regardless of where that band is located in the frequency spectrum.

For example, a 3 kHz band can carry a telephone conversation whether that band is at baseband ( as in your POTS telephone line ) or modulated to some higher frequency.

Rodolfo Llinás, for example, proposed that consciousness results from recurrent thalamo-cortical resonance where the specific thalamocortical systems ( content ) and the non-specific ( centromedial thalamus ) thalamocortical systems ( context ) interact in the gamma band frequency via temporal coincidence.

The original DECT frequency band ( 1880 MHz – 1900 MHz ) is used in all countries in Europe.

Because this band is higher in frequency than bands currently in use by deep-space missions, the same amount of data can be sent by smaller equipment in space and on the ground.

* Extremely low frequency, the band of radio frequencies from 3 to 300 Hertz

The frequency response may be tailored to, for instance, eliminate unwanted frequency components from an input signal, or to limit an amplifier to signals within a particular band of frequencies.

Work begun in 1991 to expand the GSM standard to the 1800 MHz frequency band and the first 1800 MHz network became operational in the UK by 1993.

In 2002 the first multimedia messaging services ( MMS ) were introduced and the first GSM network in the 800 MHz frequency band became operational.

The amendment defines a new PHY and such changes to the MAC as are necessary to support a new frequency allocation ( 950 MHz-956 MHz ) in Japan while coexisting with passive tag systems in the band.

Because of this choice of frequency band, 802. 11b and g equipment may occasionally suffer interference from microwave ovens, cordless telephones and Bluetooth devices.

802. 11a uses the 5 GHz U-NII band, which, for much of the world, offers at least 23 non-overlapping channels rather than the 2. 4 GHz ISM frequency band, where adjacent channels overlap-see list of WLAN channels.

The latter two radio technologies used microwave transmission over the Industrial Scientific Medical frequency band at 2. 4 GHz.

A grade of core material is chosen for best results for the frequency band.

It is shown that there are higher amounts of beta-1 frequency band ( 13 – 19 Hz ) experienced by lucid dreamers, hence there is an increased amount of activity in the parietal lobes making lucid dreaming a conscious process.

The aim of digital modulation is to transfer a digital bit stream over an analog bandpass channel, for example over the public switched telephone network ( where a bandpass filter limits the frequency range to between 300 and 3400 Hz ), or over a limited radio frequency band.

The aim of analog modulation is to transfer an analog baseband ( or lowpass ) signal, for example an audio signal or TV signal, over an analog bandpass channel at a different frequency, for example over a limited radio frequency band or a cable TV network channel.

By this standard, it is determined that where two stations operating on the same frequency are involved, objectionable interference from station A exists at any point within the service area of station B where station A's signal is of an intensity one-twentieth or more of the strength of station B's signal at that point.

The effect of the recording is very open and natural, with the frequency emphasis exactly what you would expect from a live performance.

The frequency used for these experiments is 15 mc. and the transducer is a specially cut crystal with an epoxy lens capable of providing beam diameters smaller than one millimeter.

On the other hand, the temporary reduction in hypothalamic excitability through the injection of a barbiturate into the posterior hypothalamus causes a lessening in frequency and amplitude of cortical strychnine spikes until the hypothalamic excitability is restored.

In addition, the cutoff frequency for input accelerations is approximately proportional to the servo loop gain ; ;

The effect is that the platform returns from an off-level position at a rapid rate until it is nearly level, at which point the platform is controlled by a proportional servo with low enough frequency response so that the noise has little effect on the leveling process.

`` However, evidence that the Axis powers are making significant preparations indicative of such an intention is being reported with increasing frequency from a variety of sources.

We know that the number of radio and television impulses, sound waves, ultra-violet rays, etc., that may occupy the very same space, each solitary upon its own frequency, is infinite.

It is she who decides the time, the place, the surroundings, and the frequency of the sexual act.

The participating institutions each broadcast, in real time, a frequency signal with time codes, which is their estimate of TAI.

People tend to be less cooperative if they perceive that the frequency of helpers in the population is lower.

the relative frequency at bin and is the total area of the histogram.

Contrast this with frequency modulation, in which the frequency is varied, and phase modulation, in which the phase is varied.

The Spectrogram produced by such an instrument is a graphical display of the time varying pressure level and frequency profiles which give a specific acoustic signal its defining character.

The lowest possible energy an electron can take is therefore analogous to the fundamental frequency of a wave on a string.

it was noted by Bohr that the existence of any sort of wave packet implies uncertainty in the wave frequency and wavelength, since a spread of frequencies is needed to create the packet itself.

An equivalent definition is the radius of an unperturbed circular Newtonian orbit about the Sun of a particle having infinitesimal mass, moving with an angular frequency of radians per day ; or that length such that, when used to describe the positions of the objects in the Solar System, the heliocentric gravitational constant ( the product GM < sub >☉</ sub >) is equal to ()< sup > 2 </ sup > AU < sup > 3 </ sup >/ d < sup > 2 </ sup >.

Legend: γ = Gamma ray s HX = Hard X-ray s SX = Soft X-Rays EUV = Extreme-ultraviolet NUV = Near-ultraviolet Visible light ( colored bands ) NIR = Near-infrared MIR = Moderate-infrared FIR = Far-infrared EHF = Extremely high frequency ( microwaves ) SHF = Super-high frequency ( microwaves ) UHF = Ultrahigh frequency ( radio waves ) VHF = Very high frequency ( radio ) HF = High frequency ( radio ) MF = Medium frequency ( radio ) LF = Low frequency ( radio ) VLF = Very low frequency ( radio ) VF = Voice frequency ULF = Ultra-low frequency ( radio ) SLF = Super-low frequency ( radio ) ELF = Extremely low frequency ( radio )

This is the main reason for absorption of HF radio waves, particularly at 10 MHz and below, with progressively smaller absorption as the frequency gets higher.

The F < sub > 2 </ sub > layer remains by day and night responsible for most skywave propagation of radio waves, facilitating high frequency ( HF, or shortwave ) radio communications over long distances.

Operation on 80 meters, 40 meters and the other High Frequency ( HF ) amateur radio bands was initially accomplished using make and break keying since frequency shift keying ( FSK ) was not yet authorized.

By the middle 1960s, transmitter designs were updated, mixing a crystal-controlled high frequency oscillator with a variable low frequency oscillator, resulting in better frequency stability across all Amateur Radio HF bands.

One of the new characteristics that embedded microprocessors and computers brought to HF radio via ALE, was alleviation of the need for the radio operator to constantly monitor and change the radio frequency manually to compensate for ionospheric conditions or interference.

With a radio operator initiating a call, the process normally takes a few minutes for the ALE to pick an HF frequency that is optimum for both sides of the communication link.

In telecommunication, a maritime broadcast communications net is a communications net that is used for international distress calling, including international lifeboat, lifecraft, and survival-craft high frequency ( HF ); aeronautical emergency very high frequency ( VHF ); survival ultra high frequency ( UHF ); international calling and safety very high frequency ( VHF ); combined scene-of-search-and-rescue ; and other similar and related purposes.

Note: Basic international distress calling is performed at either medium frequency ( MF ) or at high frequency ( HF ).