Epson EMP-737, EMP-740, EMP-732 manual Glossary, 109

Glossary

User’s Guide

109

The following is an explanation of some of the terms used in this guide which may be unfamiliar or which are not explained in the text of this guide itself. Further information can be obtained by referring to other commercially-available publications.

5BNC	A port used to input analogue video signals.
Abs. Color Temp.	The temperature of an object which is emitting light. If the absolute colour temperature is high, the colours tend to take on a
	bluish tinge. If the absolute colour temperature is lower, the colours tend to take on a reddish tinge.
Ad hoc mode	A method of wireless LAN connection that communicates with wireless LAN clients without using an access point.
Aspect ratio	The ratio between an image's length and its height. HDTV images have an aspect ratio of 16:9 and appear elongated. The
	aspect ratio for standard images is 4:3.
Authentication server	This is a server that centrally manages user authentication. By using an authentication server, management of user information
	and user authentication tasks can be centralised. In addition, many authentication servers use high-level authentication
	methods and so they also tend to be highly secure.
CCX	Abbreviation for Cisco Compatible Extensions. This is a security technology for wireless LANs developed by Cisco Systems,
	Inc. It uses RADIUS serverg for authentication. Several authentication methods are available for CCX, and this projector uses
	LEAPg authentication.
Component video	Video signals which have the video brightness signals and colour signals separated, in order to provide better image quality.
	In high-definition TV (HDTV), it refers to images which consist of three independent signals: Y (luminance signal), and Pb
	and Pr (colour difference signals).
Composite video	Video signals which have the video brightness signals and colour signals mixed together. The type of signals commonly used
	by household video equipment (NTSC, PAL and SECAM formats).
	The carrier signal Y (luminance signal) and chroma (colour) signal which are contained in the colour bar are overlapped to
	form a single signal.
Contrast	The relative brightness of the light and dark areas of an image can be increased or decreased in order to make text and
	graphics stand out more clearly, or to make them appear softer. Adjusting this particular property of an image is called
	"contrast adjustment".
Cool-down	This is the process by which the projector's lamp is cooled down after it has become hot through use. Cool-down is carried out
	automatically when the [Power] button is pressed to turn off the power. Do not disconnect the power cable while cool-down is
	in progress, otherwise the cool-down process will not work properly. If the cool-down period is not allowed to finish normally,
	the projector's lamp and internal components will remain at high temperatures, and this may shorten the operating life of the
	lamp or cause problems with the operation of the projector.
DHCP	Abbreviation of Dynamic Host Configuration Protocol. This protocol automatically assigns an IP address to a computer
	connected to a network.
Dolby Digital	A sound format developed by Dolby Laboratories. Normal stereo is a 2-channel format which uses two speakers. Dolby
	Digital is a 6-channel (5.1-channel) system which adds to this a centre speaker two rear speakers and a sub-woofer.
DPOF	Abbreviation of Digital Print Order Format, which is a format used to record infomation concerning the printing of
	photographs taken with a digital camera (which images to print, how many copies, etc.) to recordable media, such as a
	memory card.