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High-Tech Dictionary >>
Word Definition
EVM: Error Vector Magnitude
Error Vector Magnitude (EVM) is a modulation quality metric widely used in digital RF communications systems. It is the root-mean-square (rms) value of the error vector over time at the instants of symbol clock transitions. Used properly, EVM and related measurements can pinpoint exactly the type of degradations present in a signal and can even help identify their sources.
Eye diagram
Eye diagram is a superposition of segments of a received PAM signal displayed on an oscilloscope or similar instrument. The eye diagram is used to assess impairments in the radio channel.
ECC Memory: Error-Correcting Code Memory
Error-Correcting Code memory (ECC memory) is a type of memory that includes special circuitry for testing the accuracy of data as it passes in and out of memory. ECC memory is capable of detecting and correcting RAM errors due to environmental influence such as RF interference, power fluctuations, radiation etc.
Edge Device
Edge devices are switches, routers, routing switches, IADs and a variety of MAN/WAN devices which are installed in the edge network to pass packets between the access devices and core/backbone network devices. An edge device does not participate in the running of any network layer routing protocol but it obtains forwarding descriptions using the route distribution protocol. It is a physical device using Data Link layer (layer 2) and Network layer (layer 3) technologies.
EDID: Extended Display Identification Data
Extended Display Identification Data (EDID) is a VESA standard data format that contains basic information about a monitor and its capabilities, including vendor information, maximum image size, color characteristics, factory pre-set timings, frequency range limits, and character strings for the monitor name and serial number.
EDO DRAM
Extended Data Out Dynamic Random Access Memory (EDO DRAM) is faster than conventional DRAM, because EDO DRAM can start fetching the next block of memory at the same time that it sends the previous block to the CPU. With EDO, a microprocessor is able to output an address and then change to another address without waiting for the data to come back, be absorbed and then read by the microprocessor, as FPM DRAM requires.
EGA: Enhanced Graphics Adapter
Enhanced Graphics Adapter (EGA)is an IBM PC display standard with a resolution of 640 x 350 pixels of 16 colours. Introduced in 1984 by IBM for its PC-AT, the EGA card included a 16 kilobyte ROM to extend the system BIOS for additional graphics functions and included the Motorola MC6845 video address generator.
EIA-232
EIA-232, a popular physical layer interface also known as RS-232 or TIA-232, is a standard for serial binary data interconnection between a DTE (Data terminal equipment) and a DCE (Data communication equipment). It is commonly used in computer serial ports. A similar ITU-T standard is V.24.
EIA-423
EIA-423, also known as RS-423 or TIA-423, is the unbalanced electrical implementation of EIA/TIA-449 for EIA/TIA-232 compatibility.
EIA-449
EIA-449, also known as RS-449 or TIA-449, specifiecs the functional and mechanical characteristics of the interface between data terminal equipment and data communications equipment. The electrical signalling standards intended for use with RS 449 are RS-422 for balanced signals, and RS-423 for the unbalanced signals, with data rates up to 2,000,000 bits per second. The standard specified two D-subminiature connectors with 37 and 9 pins for the primary and secondary data circuits.
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Word : SPECmark89
Explanation : A 1989 version of SPECmark, now superseded by CINT92 and CFP92.
 
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Tech Word for Today
 Word : 0KB.IN
 Explanation : 0KB.IN - Free Knowledge Base of Internet
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