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BS EN 61334-6:2001, IEC 61334-6:2000
Click to learn more. Automatisation de la distribution a l’aide de systemes de communication a courants porteurs. You may experience issues viewing this site in Internet Explorer 9, 10 or Depending on the signal to noise ratios, the bits can be recovered from the difference between the power of the mark and space tones, the power of the mark tones only, or lec space tones only. Please download Chrome or Firefox or view our browser tips.
Each byte is collected into byte packets. The standard’s low speed is caused by the limited number of bits per power line cycle. Accept and continue Learn more about the cookies we use and how to change your iev. The frequencies are placed far enough apart that frequency-selective fading and narrow-band interference only blocks one of the frequencies, so the receiver can still recover all the data from the other frequency. From Wikipedia, the free encyclopedia.
The silence and the preamble allow the receiver’s signal processing to measure the channel’s noise ratios. Find Similar Items This product falls into the following categories.
IEC – Wikipedia
The physical layer is adaptive. S-FSK spread frequency-shift keying is a modulation lec that combines some of the advantages of classical spread-spectrum modulation immunity against narrow-band interference with some of the advantages of classical frequency-shift keying FSK is low complexity. Take the smart route to manage medical device compliance.
The first four bytes of each packet are a preamble to measure the channel’s current condition. The faster, easier way to work with standards.
The higher link-layer strongly resembles HDLCexcept with a novel feature that allows selected stations to retransmit messages. You may find similar items within these categories by selecting from the choices below:.
Related standards use the physical layer e. The most significant bits are sent first, unlike a conventional serial port. Wide area networks Networking standards. IECknown as Distribution automation using distribution line carrier systemsis a standard for low-speed reliable power line communications by electricity meterswater meters and SCADA. This page was last edited on 30 Marchat Search all products by.
A-XDR encoding rule Status: Retrieved from ” https: It is actually 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. List of International Electrotechnical Commission standards.
The high reliability comes from its reliable timing system i. 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 system should be able to adjust the receiving method on each byte packet.
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. This is followed by 38 bytes of data, and 3 byte-times of silence.