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09:19 Apr 1, 2019 |
English to Polish translations [PRO] Tech/Engineering - IT (Information Technology) | |||||||
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| Selected response from: Jacek Kloskowski United States Local time: 20:20 | ||||||
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3 | różnicowy zegar odniesienia |
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różnicowy zegar odniesienia Explanation: 1. PXI Platform and SC Express Synchronization Overview As the latest evolution of the PXI platform, PXI Express has been designed to deliver a higher degree of synchronization to measurement I/O devices while remaining backward-compatible. PXI Express maintains the 10 MHz backplane clock as well as the single-ended PXI trigger bus and PXI star trigger signal provided by the original PXI specification. PXI Express also adds a 100 MHz differential clock and differential triggers to the backplane, providing increased noise immunity and industry-leading synchronization accuracy. The 100 MHz differential clock in the PXI Express backplane allows multiple devices to base their sample clocks on the same reference. With the backplane trigger lines, you can coordinate the triggering of all the devices in the chassis to the same 100 MHz clock edge. http://www.ni.com/product-documentation/11369/en/ Differential signaling From Wikipedia, the free encyclopedia Jump to navigationJump to search This article is about electric signals via wires. For an immunological model that attempts to explain how T cells survive selection during maturation, see Differential Signaling Hypothesis. Elimination of noise by using differential signaling. Differential signaling is a method for electrically transmitting information using two complementary signals. The technique sends the same electrical signal as a differential pair of signals, each in its own conductor. The pair of conductors can be wires (typically twisted together) or traces on a circuit board. The receiving circuit responds to the electrical difference between the two signals, rather than the difference between a single wire and ground. The opposite technique is called single-ended signaling. Differential pairs are usually found on printed circuit boards, in twisted-pair and ribbon cables, and in connectors. Advantages Provided that the source and receiver impedances in the differential signaling circuit are equal, external electromagnetic interference tends to affect both conductors identically. Since the receiving circuit only detects the difference between the wires, the technique resists electromagnetic noise compared to one conductor with an un-paired reference (ground). The technique works for both analog signaling, as in balanced audio—and digital signaling, as in RS-422, RS-485, Ethernet over twisted pair, PCI Express, DisplayPort, HDMI, and USB. https://en.wikipedia.org/wiki/Differential_signaling#High-vo... Overview RS-485 supports inexpensive local networks and multidrop communications links, using the same differential signaling over twisted pair as RS-422. It is generally accepted that RS-485 can be used with data rates up to 10 Mbit/s[a] or, at lower speeds, distances up to 1,200 m (4,000 ft).[2] As a rule of thumb, the speed in bit/s multiplied by the length in metres should not exceed 108. Thus a 50-meter cable should not signal faster than 2 Mbit/s.[3] https://en.wikipedia.org/wiki/RS-485 W rzeczywistym środowisku podczas komunikacji z dużą prędkością, lub komunikacji na duże odległości, metoda niesymetryczna jest często nieodpowiednia. Różnicowe przesyłanie danych (zrównoważony sygnał różnicowy) oferuje znaczną przewagę wydajności w większości aplikacji. Sygnały różnicowe mogą pomagać w niwelowaniu efektów przesunięcia zera oraz indukowanych sygnałów zakłóceń, które mogą się pojawić w postaci wspólnego napięcia w sieci. https://pl.wikipedia.org/wiki/EIA-485 |
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