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That electronic frequency may be thought of as switched on and off to form the pulse train of an active sonar or radar system, and if the radar has a characteristic ( or known fixed ) PRR, can be used in Electronic Warfare as a measurable attribute that can be used to identify the type or class of a particular platform such as a ship or aircraft — in some cases, a particular unit.
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electronic and frequency
Flicker noise is electronic noise with a 1 / ƒ frequency spectrum ; as f increases, the noise decreases.
The 3 dB bandwidth of an electronic filter or communication channel is the part of the system's frequency response that lies within 3 dB of the response at its peak, which in the passband filter case is typically at or near its center frequency, and in the lowpass filter is near 0 hertz.
Most electromagnetic waves of higher frequency than visible light ( UV and X-rays ) are blocked by absorption from electronic excitation in ozone and dioxygen ( for UV ), and by ionization of air for energies in the extreme UV and above.
* A low-frequency oscillator ( LFO ) is an electronic oscillator that generates a frequency below ≈ 20 Hz.
1 MHz electronic oscillator circuit which uses the vibrations of an internal quartz crystal to control the frequency.
The most common form of linear oscillator is an electronic amplifier such as a transistor or op amp connected in a feedback loop with its output fed back into its input through a frequency selective electronic filter to provide positive feedback.
An electronic instrument may include a user interface for controlling its sound, often by adjusting the pitch, frequency, or duration of each note.
This is an electronic instrument which measures the frequency of an applied repetitive electronic signal and displays the result in hertz on a digital display.
Cyclic processes that are not electrical in nature, such as the rotation rate of a shaft, mechanical vibrations, or sound waves, can be converted to a repetitive electronic signal by transducers and the signal applied to a frequency counter.
** Electronic filter, an electronic circuit which processes signals, for example to remove unwanted frequency components
Piezoelectricity is found in useful applications such as the production and detection of sound, generation of high voltages, electronic frequency generation, microbalances, and ultrafine focusing of optical assemblies.
Jamming may be intentional, as with an electronic warfare tactic, or unintentional, as with friendly forces operating equipment that transmits using the same frequency range.
However, amplification of stethoscope contact artifacts, and component cutoffs ( frequency response thresholds of electronic stethoscope microphones, pre-amps, amps, and speakers ) limit electronically amplified stethoscopes ' overall utility by amplifying mid-range sounds, while simultaneously attenuating high-and low-frequency range sounds.
Before cable-ready TV sets became common in the late 1980s, an electronic tuning device called a cable converter box was needed to receive the additional analog cable TV channels and transpose or convert the selected channel to analog radio frequency ( RF ) for viewing on a regular TV set on a single channel, usually VHF channel 3 or 4.
* Tone control, a ( typically electronic ) control for affecting frequency content of an audio signal
The greatest difference is the integration of an inertial navigation system, sensors detecting the weapons ' lay, automation, and an encrypted digital communication system which utilizes computer controlled frequency hopping to avoid enemy electronic warfare and allow the howitzer to send grid location and altitude to the battery fire direction center ( FDC ).
The ARRL handbook also says that analog multimeters, with no electronic circuitry, are less susceptible to radio frequency interference.
A caesium standard or caesium atomic clock is a primary frequency standard in which electronic transitions between the two hyperfine ground states of caesium-133 atoms are used to control the output frequency.
ANSI and International Electrotechnical Commission | IEC standard electronic symbol | schematic symbol for a circulator ( with each waveguide or transmission line port drawn as a single line, rather than as a pair of conductors ) A circulator is a passive non-reciprocal three-or four-port device, in which a microwave or radio frequency signal entering any port is transmitted to the next port in rotation ( only ).
A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a very precise frequency.
For a parallel resonance crystal to operate at its specified frequency, the electronic circuit has to provide a total parallel capacitance as specified by the crystal manufacturer.
electronic and may
The stepped-up defense procurement called for in the 1961 Budget has already begun to make itself felt in an upturn in orders for military electronic equipment and the components that go into it, and it has been suggested that an additional $2 billion increase in total defense spending may be requested for fiscal 1962.
Both index words and electronic switches may have been made unavailable before the start of assignment in one of the following ways.
Index words and electronic switches may be reserved in the following ways.
Extreme caution should be used, however, to avoid the conflicting usage of an index word or electronic switch which may result from the assignment of more than one name or function to the same address.
The resultant conflicting usage of index words or electronic switches may be avoided by reducing the number of symbolic names used, e.g., through the proper use of the EQU, XRELEASE, or SRELEASE statements.
In electronic filter design, a filter specification may require that within the filter passband, the gain is nominally 0 dB +/- a small number of dB, for example within the +/- 1 dB interval.
In major modern economies such as those of the United States or the Euro Zone, most money is electronic, but the " currency " of these polities may, depending on context, include all money or just specie ( i. e., various physical representations of money ).
Pet doors may be electronic, only allowing pets with a special electronic tag to enter.
Electrical engineering may include electronic engineering.
Modern electronic commerce typically uses the World Wide Web at least at one point in the transaction's life-cycle, although it may encompass a wider range of technologies such as e-mail, mobile devices and telephones as well.
A rackmount unit may contain electronic circuitry identical to a stompbox's, although its circuits are typically more complex.
Guitar amplifiers and electronic keyboards may have switch pedals for turning built-in effects on and off.
Since the output of an electric guitar is an electric signal, the signal may easily be altered using electronic circuits to add " color " to the sound.
These contrasting traditions may be vestiges of historical performance settings: large concert halls in which violins were played required more instruments, before electronic amplification, than did more intimate dance halls and houses fiddles were played in.
When the Attorney General determines that an emergency exists he may authorize the emergency employment of electronic surveillance before obtaining the necessary authorization from the FISA court, after which the Attorney General or his designee must notify a judge of the court not more than 72 hours after the Attorney General authorizes such surveillance.
Thus, all three models for paramagnetic Hb-O < sub > 2 </ sub > may contribute to some small degree ( by resonance ) to the actual electronic configuration of Hb-O < sub > 2 </ sub >.
Hall effect sensors are readily available from a number of different manufacturers, and may be used in various sensors such as rotating speed sensors ( bicycle wheels, gear-teeth, automotive speedometers, electronic ignition systems ), fluid flow sensors, current sensors, and pressure sensors.
Fortunately, techniques to gather knowledge from an overabundance of electronic information ( e. g., data fusion may help in data mining ) have existed since the 1970s.
Information security is concerned with the confidentiality, integrity and availability of data regardless of the form the data may take: electronic, print, or other forms.
For example, certain simple electronic circuits may be designed which are described by a jerk equation.
These workshops may include help with citations, effective search techniques, journal databases, and electronic citation software.
Engineers reckon the break is between the cities of Misrata and Khoms, and may be a physical or electronic rupture.
* Theoretical lexicography is the scholarly discipline of analyzing and describing the semantic, syntagmatic and paradigmatic relationships within the lexicon ( vocabulary ) of a language, developing theories of dictionary components and structures linking the data in dictionaries, the needs for information by users in specific types of situation, and how users may best access the data incorporated in printed and electronic dictionaries.
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