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  Glossary
E
Encoding - Encoding is the process of transforming information from one format to another. @teqgear
Encryption - The coding of a informatiom by a transmitting unit used to prevent unauthorized eavesdropping along the transmission line; the receiving unit uses the same algorithm as the transmitting unit to decode the incoming message. Our WID101 uses WEP encryption for secure video transmission. @teqgear
Ethernet - The most widely used Local Area Network (LAN). Ethernet connects up to 1,024 nodes at 10 Megabits per second (Mbits/s) over twisted pair, coaxial, and fiber-optic cables. Based on the IEEE 802.3 standard. Newer versions of Ethernet connect at 100 Mbits/s and 1 Gbit/s. 10 Gbit/s Ethernet is also under development. @teqgear
F
FAQ - Frequently asked questions. @teqgear
FCC - Federal Communications Commission. The US governmental agency that controls and makes all policy for the use of broadcast airwaves like radio and TV. @teqgear
Fiber optic - A transmission medium designed to transmit digital signals in the form of pulses of light. The technology for light projection and guidance. Thin optical cables are used for guiding the transmission of optical waves. @teqgear
Firewall - In computing, a firewall is a piece of hardware and/or software which in a networked environment prevents communications forbidden by the security policy. @teqgear
Flash memory - A computer chip with a read-only memory that retains its data when the power is turned off and that can be electronically erased and reprogrammed without being removed from the circuit board. Flash memory stores information in an array of floating gate transistors, called "cells", each of which traditionally stores one bit of information. @teqgear
fps - frames per second. A measure of information that is used to store and display motion video. Each frame represents a still image and displaying frames in succession creates the illusion of motion. The more frames per second (fps), the smoother the motion appears. Typically 24 fps are needed to effectively display full-motion video. @teqgear
Frame - In computer graphics, one screenful of data or its equivalent storage space. In full-motion video, it requires approximately 24 consecutive frames in one second (24 fps) to simulate real, continuous motion. @teqgear
Frequency - The number of times a particular event happens per a given time. Frequency is the reciprocal of the period of a signal. In A/V, the number of complete cycles per second of a musical tone or electronic signal, expressed in Hertz (Hz). @teqgear
Frequency range (audio) - The range of frequencies between high and low end points; The range of frequencies to which the human ear is sensitive is approximately 20 to 20,000 hertz. @teqgear
Frequency range (video) - Refers to the low-to-high operating frequency limits of a device, such as a computer, projector, or monitor. @teqgear
Fully loaded - Refers to the condition when all inputs (in the case of a switcher or Matrix Switchers) or all outputs (in the case of a distribution amplifier or Matric Switchers) are connected to loads/devices, that is, the product has a maximum load connected. This is pertinent because if a product is not properly designed, the voltage and the bandwidth can decrease and the signal can drop out as more loads are connected. Also crosstalk can become a problem as more signals are connected to the inputs or outputs. @teqgear
G
Gain - (1) A general term for an increase in signal power or voltage produced by an amplifier. The amount of gain is usually expressed in decibels above a reference level. Opposite of attenuation. (2) The amplification of a signal, unit, or system. Expressed in the unit of measurement appropriate to the signal or system. @teqgear
GHz - Gigahertz. One billion cycles per second. 802.11b/g operate in the 2.4 GHz range. @teqgear
Ground - An electrically conductive body, which maintains a zero potential (not positively or negatively charged) for connecting to an electrical circuit, such as the earth. @teqgear
H
Hardware - Physical equipment. @teqgear
HD connector - High density connector, three-row plug/socket with 15 pins (D-SUB). Usually used for transferring PC monitor signals (VGA). @teqgear
HDTV - Acronym for High Definition Television. High-definition television is a digital television format that delivers sharper picture quality with more lines of resolution. @teqgear
Hertz (Hz) - A unit of frequency; describing the number of cycles per second. 1Hz = 1 cycle/second…1MHz = 1 Million cycles/second. @teqgear
Horizontal sync - The pulses that control the horizontal scanning of the electron beam in a video device. On connector panels, "H" identifies the connector for horizontal sync, and "H/HV" means it is also used for combined or "composite" horizontal and vertical sync (RGBS). @teqgear
Hot-swap - To pull out a component from a system and plug in a new one while the main power is still on. USB devices are one example of a hot-swappable component. @teqgear