G
gain
A measure of the increase in signal level, relative to a reference, in an amplifier. Usually
expressed in decibels.
H
Hertz
A unit of frequency equal to one cycle per second.
HFC
hybrid fiber/coaxial. A network that uses a combination of fiber optics and coaxial cable to
transport signals from one place to another. A broadband network using standard cable
television transmission components, such as optical transmitters and receivers, coaxial cable,
amplifiers, and power supplies. The broadband output stream is transmitted as an optical
signal, over the high-speed, fiber optic transmission lines to local service areas where it is
split, converted to electrical RF signals, and distributed to set-tops over coaxial cable.
I
I/O
input/output.
IC
integrated circuit.
IEC
International Electro-technical Commission.
IF
intermediate frequency. The common frequency which is mixed with the frequency of a local
oscillator to produce the outgoing radio frequency (RF) signal.
in-lb
inch-pound. A measure of torque defined by the application of one pound of force on a lever
at a point on the lever that is one inch from the pivot point.
ITU
International Telecommunications Union.
L
LE
line extender.
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