NT 1310
Unit 7 Exercise 1
Fiber Optics –Definitions
Crosstalk – Electronics undesired signals or sounds, as of voices, in a telephone or other communications device as a result of coupling between transmission circuits.
Waveguides - A system of material boundaries in the form of a solid dielectric rod or dielectric-filled tubular conductor capable of guiding high-frequency electromagnetic waves.
FTTH – Fiber-to-the-home the fiber reaches the boundary of the living space, such as a box on the outside wall of a home in order to provide electronic connection.
Simplex – Of or relating to a telecommunications system in which only one message can be sent in either direction at one time.
Half – Duplex – Half duplex communication means that a system may transmit and receive signals, but not at the same time. It has to switch over from transmit to receive, and vice-versa.
Full- Duplex – Telegraph or other data channel able to operate in both directions simultaneously.
Photodiode – A semiconductor diode in which the reverse current varies with illumination; examples include the alloy-junction photocell and the grown-junction photocell. Also known as photoconductor diode.
Amplitude Modulation - The encoding of a carrier wave by variation of its amplitude in accordance with an input signal. A broadcast system that uses amplitude modulation.
Analog Transmission - is a transmission method of conveying voice, data, image, signal or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable. It could be the transfer of an analog source signal, using an analog modulation method such as Frequency modulation (FM) or Amplitude modulation (AM), or no modulation at all.
Digital Transmission - is the physical transfer of data (a digital bit stream) over a point-to-point or point-to-multipoint communication channel. Examples of such channels are copper wires, optical