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ετυμολογία

electromagnetic interference - translation to ρωσικά

DISTURBANCE IN AN ELECTRICAL CIRCUIT DUE TO EXTERNAL SOURCES OF RADIO WAVES

Radio Frequency Interference; Electromagnetic noise; Radio frequency interference; Radio interference; RF interference; Electromagnetic Interference; Dirty power; Distortion (electronic circuits); Electrical interference; Electromagnetic influence; EM interference; Conducted electromagnetic interference; Intentional EMI; Conducted Electromagnetic Interference; Radio-frequency interference; Electro-magnetic interference; Radiofrequency interference; Harmful interference; Radio Frecuency Interference; Radio-frequency-interference

electromagnetic interference

общая лексика

электромагнитные помехи (наводки)

помехи в сети электропитания и в электронных цепях от работы электрических машин и электронных устройств. Могут быть снижены за счет экранирования

синоним

EMI

electrical interference

общая лексика

электрическая помеха

электрическое влияние

rf interference

общая лексика

эфирные электромагнитные помехи

Ορισμός

Radio Frequency Interference

<hardware, testing> (RFI) Electromagnetic radiation which is emitted by electrical circuits carrying rapidly changing signals, as a by-product of their normal operation, and which causes unwanted signals (interference or noise) to be induced in other circuits. The most important means of reducing RFI are: use of bypass or "decoupling" capacitors on each active device (connected across the power supply, as close to the device as possible), risetime control of high speed signals using series resistors and VCC filtering. Shielding is usually a last resort after other techniques have failed because of the added expense of RF gaskets and the like. The efficiency of the radiation is dependant on the height above the ground or power plane (at RF one is as good as the other) and the length of the conductor in relationship to the wavelength of the signal component (fundamental, harmonic or transient (overshoot, undershoot or ringing)). At lower frequencies, such as 133 MHz, radiation is almost exclusively via I/O cables; RF noise gets onto the power planes and is coupled to the line drivers via the VCC and ground pins. The Rf is then coupled to the cable through the line driver as common node noise. Since the noise is common mode, shielding has very little effect, even with differential pairs. The RF energy is capacitively coupled from the signal pair to the shield and the shield itself does the radiating. At higher frequencies, usually above 500 Mhz, traces get electrically longer and higher above the plane. Two techniques are used at these frequencies: wave shaping with series resistors and embedding the traces between the two planes. If all these measures still leave too much RFI, sheilding such as RF gaskets and copper tape can be used. Most digital equipment is designed with metal, or coated plastic, cases. Switching power supplies can be a source of RFI, but have become less of a problem as design techniques have improved. Most countries have legal requirements that electronic and electrical hardware must still work correctly when subjected to certain amounts of RFI, and should not emit RFI which could interfere with other equipment (such as radios). See also Electrostatic Discharge, {Electromagnetic Compatibility}. (1998-01-26)

Εμφάνιση περισσότερων ορισμών

Βικιπαίδεια

Electromagnetic interference

Electromagnetic interference (EMI), also called radio-frequency interference (RFI) when in the radio frequency spectrum, is a disturbance generated by an external source that affects an electrical circuit by electromagnetic induction, electrostatic coupling, or conduction. The disturbance may degrade the performance of the circuit or even stop it from functioning. In the case of a data path, these effects can range from an increase in error rate to a total loss of the data. Both man-made and natural sources generate changing electrical currents and voltages that can cause EMI: ignition systems, cellular network of mobile phones, lightning, solar flares, and auroras (northern/southern lights). EMI frequently affects AM radios. It can also affect mobile phones, FM radios, and televisions, as well as observations for radio astronomy and atmospheric science.

EMI can be used intentionally for radio jamming, as in electronic warfare.

https://en.wikipedia.org/wiki/Electromagnetic interference

Παραδείγματα από το σώμα κειμένου για electromagnetic interference

1. Actually, electronic components already enjoy some form of shielding against electromagnetic interference.

2. They also scoured the spacecraft for any electromagnetic interference that might have exacerbated the fuel gauge problem.

3. All that remains are faulty electrical grounding in the shuttle‘s aft fuselage, which has been fixed, and possible electromagnetic interference.

4. Among the many shuttle parts suspected of possibly causing electromagnetic interference are newly installed heaters on the external fuel tank.

5. If the glitch reoccurs on Tuesday, managers plan additional tests to try to rule out electromagnetic interference, an open circuit or an electronics error.

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