Flashcards in CT3 Cable Theory and Terms 16 Deck (14):
Radio Wave is
An electromagnetic wave that has been produced by a transmitter
an electromagnetic wave that generally falls in the frequency range of 3 kHz to 300 GHz
MHz (Megahertz) Equal to
one million Hertz. Video Signal Bandwidth is typically expressed in MHz
The number of times per second that a signal fluctuates
a range of wavelengths of electromagnetic emission
The difference between transmitted and received power resulting from the loss through equipment, lines,
or other transmission devices. usually expressed in decibels.
5 factors of attenuation
Length of cable, size of the center conductor, type of dielectric, temperature, frequency.
The insulating material separating two conductors such as that between the center conductor and sheath in coaxial cable
When coaxial cable heats up its attenuation...
a passive cable device that electrically siphons off a portion of signal from a main distribution line or feeder.
Signal Level Meter (SLM)
a frequency selective receiver capable of tuning in a desired frequency with a meter showing the strength of the input voltage and the frequency.
relative signal level. it refers to the comparison of 2 or more signal levels
Is the measure of the ability of a circuit (often an amplifier) to increase the power or the amplitude of a signal from the input to the output