Radio And Tv

Front 1

fiber-optic cable

Back 1

hair-thing strands of extremely pure glass (or plastic in short distances) convey modulated light beams with a bandwidth over 1000 megabytes per second.

Front 2

coaxial cable

Back 2

remains a primary method for relaying tv programs by wire

Front 3

twisted pair

Back 3

old type of copper wire originally used for a telephone wire. can now provide tv and broadband, but with limited bandwidth.

Front 4

wire relays

Back 4

fiber optic, coaxial, twisted pair

Front 5

headend

Back 5

were the system operator takes in the sources of programing and distributes it to the subscribers, can provide service in a 5-10 mile radius.

Front 6

tree and branch architecture

Back 6

TRUNK cables branch to FEEDER cables that carry the signals to the streets, where still thinner DROP cables carry the signals to individual households.

Front 7

hybrid fiber-coxial

Back 7

(HFC) send signal to the optical node in the neighborhood, need fewer amplifiers for signal strength

Front 8

Fiber to the node

Back 8

FTTN - or fiber to the neighborhood

Front 9

fiber to the home

Back 9

FTTH - used by fios to bring the fiber-optic cable directly to the home.

Front 10

Set-top box

Back 10

STB - what the customer uses to control his cable service

Front 11

Internet Protocol TV

Back 11

IPTV - uses internet to allow the customers to have access to the VOD services

Front 12

ISP

Back 12

internet service provider

Front 13

Internet protocol multicast

Back 13

IP Multicast switches individual program stream only to the homes requesting them via remote control

Front 14

addressable

Back 14

a system that can communicate back and forth between the costumer and the provider

Front 15

cable card

Back 15

invention that was used to make systems that were not addressable, addressable. never really picked up in popularity

Front 16

wireless relays

Back 16

satellite and microwaves

Front 17

satellite

Back 17

DBS - direct broadcast satellite

Front 18

geostationary or geosynchronous orbit

Back 18

the orbit of a satellite that matches the rotation of the earth in order to have the satellite stay over a certain area

Front 19

uplink

Back 19

when the headend sends a signal to the satellite

Front 20

downlink

Back 20

the signal from the satellite is transmitted to the homes

Front 21

low-noise amplifier

Back 21

LNA amplify the satellite singal strength by as much as a million times

Front 22

down converter

Back 22

converts the satellite signal into the lower frequency that TVs use

Front 23

satellite construction

Back 23

require the five essential parts- transponders, antennas, power supplies, telemetering devices, and small thrusters

Front 24

transponders

Back 24

the receive/transmit units that pick up programs, amplify them, and transmit them back to earth

Front 25

antennas

Back 25

for receiving the uplink signals and transmitting the downlink signals

Front 26

power supplies

Back 26

consisting of both solar cells and storage batteries

Front 27

telemetering devices

Back 27

for reporting the satellites vital signs to and receiving instructions from, the ground controllers

Front 28

small thrusters

Back 28

for moving the satellite, or aligning its position

Front 29

Satellite Digital audio radio services

Back 29

SDARS - the alternate radio service, providing more channels for the subcriber

Front 30

internet

Back 30

made in the 60s for military and university use, did not become widely used until the late 80's

Front 31

Hypertext transfer protocol

Back 31

HTTP

Front 32

hypertext markup language

Back 32

HTML

Front 33

National access points

Back 33

NAPs- created to connect the major areas together

Front 34

internet exchange points

Back 34

IXPs - interconnect the different systems from around the world

Front 35

Internet service provider

Back 35

ISP

Front 36

digital subscriber line

Back 36

dsl - telephone based system that uses the twisted pair

Front 37

domain name system

Back 37

DNS giant internet directory of IP addresses used by networking equipment to deliver information

Front 38

Uniform resource locator

Back 38

URL what we type in to access a domain name

Front 39

WiMax

Back 39

similar to wifi but covers a large area

Front 40

global system for mobil communications

Back 40

gsm the most popular standard for mobil phone and data transmission