"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 section of 'E' Radar Terms
EMC (ELECTROMAGNETIC COMPATIBILITY): That condition in which electrical/electronic systems can
perform their intended function without experiencing degradation from, or causing degradation to other electrical/electronic systems. More simply stated, EMC is that condition which exists in the absence of EMI.
EME (ELECTROMAGNETIC ENVIRONMENT): The total electromagnetic energy in the RF spectrum that
exists at any given location.
EMI (ELECTROMAGNETIC INTERFERENCE): Any induced, radiated, or conducted electrical emission,
disturbance, or transient that causes undesirable responses, degradation in performance, or malfunctions of any electrical or electronic equipment, device, or system. Also synonymously referred to as RFI (Radio Frequency Interference).
EMI MODEL: Usually a set of equations or logical concepts designed to illustrate the interactions, the detailed
parameters considerations, and mathematical procedures necessary for proper analysis of a given EMI situation.
EMITTER: Any device or apparatus which emits electromagnetic energy.
EMP (ELECTROMAGNETIC PULSE): The generation and radiation of a very narrow and very high-amplitude pulse of electromagnetic noise. It is associated with the high level pulse as a result of a nuclear detonation and with intentionally generated narrow, high-amplitude pulse for ECM applications. In the case of nuclear detonations, EMP consists of a continuous spectrum with most of its energy distributed through the low frequency band of 3 KHz to 1 MHz.
ERROR SIGNAL: In servomechanisms, the signal applied to the control circuit that indicates the degree of mis-alignment between the controlling and the controlled members. In tracking radar systems, a voltage dependent upon the signal received from a target whose polarity and magnitude depend on the angle between the target and the center axis of the scanning beam.
EXTERNALLY SYNCHRONIZED RADAR: A Radar system in which timing pulses are generated by a
master oscillator external to the transmitter.
