y
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`IEEE 100
`The Authoritative Dictionary of
`IEEE Standards Terms
`
`Seventh Edition
`
`Published by
`Standards Information Network
`IEEE Press
`
`

`

`y
`
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`

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`interdigit (interdigital) time
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`y
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`␭/4
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`574
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`BUS BAR
`
`␭/8
`
`interface
`
`APERTURE
`
`FINGER/ELECTRODE
`
`APERTURE
`
`␭/4
`
`␭/8
`
`IDT with Single (␭/4) Electrodes
`
`IDT with Double/Split (␭/8) Electrodes
`
`illustration of transducer parameters
`
`interdigit (interdigital) time (measuring the performance of
`tone address signaling systems) The time interval between
`successive signal present intervals during which no signal
`present condition exists. This time includes the signal off con-
`dition and transition intervals between signal off condition
`and signal present condition on both state transitions.
`(COM/TA) 752-1986w
`interelectrode capacitance (j– I interelectrode capacitance cjl
`of an n-terminal electrode tube) The capacitance deter-
`mined from the short-circuit transfer admittance between the
`jth and the lth terminals. Note: This quantity is often referred
`to as direct interelectrode capacitance. See also: electron-tube
`admittances.
`(ED) 161-1971w
`interelectrode transadmittance (j– I interelectrode transad-
`mittance of an n-electrode electron tube) The short-circuit
`transfer admittance from the jth electrode to the lth electrode.
`See also: electron-tube admittances.
`(ED) 161-1971w
`interelectrode transconductance (j– I interelectrode trans-
`conductance) The real part of the j– I interelectrode transad-
`mittance. See also: electron-tube admittances.
`(ED) 161-1971w
`interelement influences (polyphase wattmeters) The percent-
`age change in the recorded value that is caused solely by the
`action of the stray field of one element upon the other element.
`Note: This influence is determined at the specified frequency
`of calibration with rated current and rated voltage in phase
`on both elements or such lesser value of equal currents in
`both elements as gives end-scale deflection. Both current and
`voltage in one element shall then be reversed, and, for rating
`purposes, one-half the difference in the readings in percent is
`the interelement influence. See also: accuracy rating.
`(EEC/ERI/AII) [111], [102]
`interexchange carrier In the United States, a common carrier
`limited by law to carry telephone traffic between local ex-
`change and transport areas.
`(C) 610.7-1995
`interexchange channel A direct channel or circuit between ex-
`changes.
`(C) 610.7-1995
`interface (1) (696 interface devices) A shared electrical bound-
`ary between parts of a computer system, through which in-
`formation is conveyed.
`(C/MM) 696-1983w
`(2) (microprocessor operating systems) A shared boundary
`between two layers or modules of software.
`(C/MM) 855-1985s
`(3) (watthour meters) The means for transmitting informa-
`tion between the register and peripheral equipment.
`(ELM) C12.13-1985s
`(4) (general) A shared boundary.
`(C) [20], [85]
`(5) (Class 1E equipment and circuits) (nuclear power gen-
`erating station) A junction or junctions between a Class 1E
`equipment and another equipment or device. (Examples: con-
`nection boxes, splices, terminal boards, electrical connec-
`tions, grommets, gaskets, cables, conduits, enclosures, etc.)
`(PE/NP) 380-1975w, 323-1974s
`
`(6) (programmable instrumentation) A common boundary
`between a considered system and another system, or between
`parts of a system, through which information is conveyed.
`(IM/AIN) 488.1-1987r
`(7) (test, measurement, and diagnostic equipment) A
`shared boundary involving the specification of the intercon-
`nection between two equipments or systems. The specifica-
`tion includes the type, quantity and function of the intercon-
`nection circuits and the type and form of signals to be
`interchanged via those circuits. See also: adapter.
`
`(MIL) [2]
`(8) (A) (data transmission) A common boundary; for ex-
`ample, a physical connection between two systems or two
`devices. The boundary may be mechanical such as the phys-
`ical surfaces and spacings in mating parts, modules, compo-
`nents, or subsystems, or electrical, such as matching signal
`levels, impedances, or power levels of two or more subsys-
`tems. (B) (data transmission) A concept involving the spec-
`ification of the interconnection between two equipments or
`systems. The specification includes the type, quantity, and
`function of the interconnection circuits and the type and form
`of signals to be interchanged by these circuits.
`(PE) 599-1985
`(9) (A) (software) A shared boundary across which infor-
`mation is passed. (B) (software) A hardware or software
`A hardware or software
`component that connects two or more other components for
`rcomponent that connects two or more other components for
`
`the purpose of passing information from one to the other.
`the purpose of passing information from one to the other.
`(C) (software) To connect two or more components for the
`purpose of passing information from one to the other.
`(D) (software) To serve as a connecting or connected com-
`ponent as in definition (B).
`(C) 610.12-1990
`(10) (STEbus) A shared boundary between two or more sys-
`tems, or between two or more elements within a system,
`through which information is conveyed.
`(MM/C) 796-1983r, 1000-1987r
`(11) (SBX bus) A shared boundary, between two systems or
`parts of systems, through which information is transferred.
`(C/MM) 959-1988r
`(12) (electromechanical watthour meters) The means for
`communications between devices.
`(ELM) C12.15-1990
`(13) A device placed between the line output of a digital
`telephone set and test equipment. The device performs at least
`one of the following functions: simulation of a normal net-
`work connection, control of the telephone set under test, or
`access for the reference codec to the digital voice signal.
`(COM/TA) 269-1992
`(14) A junction or junctions between a Class 1E equipment
`and another equipment or device. (For motors, typical inter-
`faces include, as applicable: mechanical mounting connection
`to the driven equipment and the motor mounting to its base,
`and force transmitted to the motor, electrical connection,
`cooling system connections, and lubrication system connec-
`tion. See also: user interface; data-transfer interface.
`(PE/NP) 334-1994r
`
`