"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"
'Fa' to 'Fq', 'Fr' to 'Fz'
FALSE ALARM: The false reporting of a target produced by a spike of noise or clutter.
FAST TIME CONSTANT: Differentiator circuit in the first video amplifier that allows
only the leading edges of target returns, no matter how small or large, to be used.
FEEDBACK: The return of a portion of the output of a circuit to its input.
FEEDHORN: A horn radiator used to feed a reflector.
Reflector and Feedhorn
FERRET: An aircraft, ship, or vehicle especially equipped for the detection, location, recording, and analyzing of electromagnetic radiations.
FFT: Fast Fourier Transform.
FIELD STRENGTH: The magnitude of a magnetic or electric field at any point, usually expressed in terms of ampere turns per meter or volts per meter. Sometimes called field intensity and is expressed in volts/meter or dBFv/meter. Above 100 MHz, power density terminology is used more often.
FIRST DETECTOR: See Mixer.
FIRST HARMONIC: The fundamental (original) frequency.
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