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This page was last edited on 30 Marchat Please download Chrome or Firefox or view our browser tips. The frequencies are placed far enough apart that frequency-selective fading and narrow-band interference only 6133-46 one of the frequencies, so the receiver can still recover all the data from the other frequency. A-XDR encoding rule Status: From Wikipedia, the free encyclopedia. Electric power distribution, Electric power transmission, Electric power distribution lines, Data transmission, Electric power transmission networks, Electric power networks, Automatic control systems, Control systems, Coding data conversionCodes, Data handling, Data syntax, Data transfer.
The data from zero crossings should be collected into 8-bit bytes. The faster, easier way to work with standards. The physical layer synchronizes a small packet of tones to the zero-crossing of the power line’s voltage. The high reliability comes from its reliable timing system 661334-6.
The bytes from the low-layer packets are reformed into bytes for the higher layers. List of International Electrotechnical Commission standards. Search all products by. In multiphase power lines, a separate signal might be sent on each phase to 63134-6 up the transmission. IECknown as Distribution automation using distribution line carrier iwcis a standard for low-speed reliable power line communications by electricity meterswater meters and SCADA.
IEC – Wikipedia
Views Read Edit View history. You may experience issues viewing this site in Internet Explorer 9, 10 or It is 613334-6 a series of standards describing the researched physical environment of power lines, a well-adapted physical layer, a workable low-power media access layer, and a management interface.
The physical layer is adaptive. The standard permits each zero-crossing to convey 1, 2, 4 or 8 bits, with increased sensitivity to timing as the number of bits increases. The silence and the preamble allow the receiver’s signal processing to measure the channel’s noise ratios. Each byte is collected into byte packets. Verteilungsautomatisierung mit Hilfe von Traegersystemen auf Verteilungsleitungen. Your basket is empty. Retrieved from ” https: Automatisation de la distribution a l’aide de systemes de communication a courants porteurs.
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This is followed by 38 bytes of data, and 3 byte-times of silence. The higher link-layer strongly resembles HDLCexcept with a novel feature that allows selected stations to retransmit messages.
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BS EN 61334-6:2001, IEC 61334-6:2000
One tone is chosen for mark i. S-FSK spread frequency-shift keying is a modulation scheme that combines some of the advantages of classical spread-spectrum 613334-6 immunity against narrow-band interference with some of the advantages of classical frequency-shift keying FSK is low complexity.
The tones are chosen by utilities, not specified in the standard. Take the smart route to manage medical device compliance.
IEC – MediaWiki
You may find similar items within these categories by selecting from the choices below:. The system should be able to adjust the receiving method on each byte packet. For example, it lets a central controller read a unit’s signal to noise ratios, and set the bit that enables a station to retransmit weak stations. The first 611334-6 bytes of each packet are a preamble to measure the channel’s current condition.