"A"
"B"
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z"
Previous set of "M" definitions
MAXIMUM USABLE FREQUENCY. Maximum frequency that can be used for communications
between two locations for a given time of day and a given angle of incidence.
MECHANICAL-ROTATION FREQUENCY. The speed in revolutions per minute of armatures in
electric motors and engine-driven generators; blade speed in turbines.
MECHANICAL SCANNING. The reflector, its feed source, or the entire antenna is moved in a desired
pattern.
MEDIUM. The vehicle through which a wave travels from one point to the next. Air, water, and wood are
examples.
MEDIUM ALTITUDE ORBIT. An orbit from 2,000 to 12,000 miles above the earth. The rotation rate of
the earth and satellite are quite different, and the satellite moves quickly across the sky.
MEDIUM FREQUENCY. The band of frequencies from 300 kHz to 3 MHz.
MEGA. A prefix meaning one million, 106; also MEG.
MEGOHMMETER. A meter that measures very large values of resistance; usually used to check for
insulation breakdown in wires.
METAL ELECTRODE LEADLESS FACE. Surface Mount Components that have metallized terminals at each end of a cylindrical body. MELF components are designed to fit the same footprints as flat components, i.e.: 0805 (.08" x .05") and the 0603 (.06" x .03"). MELF devices may be Fuses, Resistors, or Diodes.
METALLIC, INSULATOR. A shorted quarter-wave section of transmission line.
METALLIC RECTIFIER. Also known as a DRY-DISC RECTIFIER. A metal-to-semiconductor, large area, contact device in which a semiconductor is sandwiched between two metal plates. This asymmetrical construction permits current to flow more readily in one direction than the other.
METAL-OXIDE SEMICONDUCTOR FIELD-EFFECT TRANSISTOR. See MOSFET. [FET Manufacturers]
METER. A device used to measure a specific quantity, such as current, voltage, or frequency.
METER MOVEMENT. The part of the meter that moves to indicate some value.
METER SHUNT. A resistor placed in parallel with the meter terminals; used to provide increased range capability.
MEZZANINE. The termed used to describe a daughter card which plugs into another card [motherboard] which is then plugged a backplane. [Mezzanine Card Manufacturers]
MHO. Unit of conductance; the reciprocal of the ohm.
MICRO. A prefix meaning one-millionth, 10-6.
MICROCIRCUIT. A circuit having high equivalent-circuit-element density, considered as a single part composed of interconnected elements on or within a single substrate to perform an electronic-circuit function.
MICROCIRCUIT MODULE. An assembly of microcircuits or a combination of microcircuits and discrete components that perform one or more distinct functions.
MICROELECTRONICS. The solid-state concept of electronics in which compact semiconductor materials are designed to function as an entire circuit or sub-assembly rather than as circuit components [ICs].
Next set of "M" Terms
