Dell 5100MP Owner's Manual

Also see for 5100MP - SXGA+ DLP Projector: Specifications User guide MIB Definitions Guide Setup guide Owner's manual

Contents

w w w . d e l l . c o m | s u p p o r t . d e l l . c o m90 GlossaryContrast Ratio— Range of light and dark values in a picture, or the ratio betweentheir maximum and minimum values. There are two methods used by theprojection industry to measure the ratio:1 Full On/Off — measures the ratio of the light output of an all white image (fullon) and the light output of an all black (full off) image.2 ANSI — measures a pattern of 16 alternating black and white rectangles. Theaverage light output from the white rectangles is divided by the average lightoutput of the black rectangles to determine the ANSI contrast ratio.Full On/Off contrast is always a larger number than ANSI contrast for the sameprojector.dB— decibel—A unit used to express relative difference in power or intensity,usually between two acoustic or electric signals, equal to ten times the commonlogarithm of the ratio of the two levels.Diagonal Screen— A method of measuring the size of a screen or a projectedimage. It measures from one corner to the opposite corner. A 9FT high, 12FTwide, screen has a diagonal of 15FT. This document assumes that the diagonaldimensions are for the traditional 4:3 ratio of a computer image as per the exampleabove.DLP— Digital Light Processing—Reflective display technology developed byTexas Instruments, using small manipulated mirrors. Light passes through a colorfilter is sent to the DLP mirrors which arrange the RGB colors into a pictureprojected onto screen, also known as DMD.DMD— digital Micro- Mirror Device— Each DMD consists of thousands oftilting, microscopic aluminum alloy mirrors mounted on a hidden yoke.DVI— Digital Visual Interface— Defines the digital interface between digitaldevices such as projectors and personal computers. For devices that support DVI, adigital to digital connection can be made that eliminates the conversion to analogand thereby delivers an unblemished image.Focal Length— The distance from the surface of a lens to its focal point.Frequency— It is the rate of repetition in cycles per seconds of electrical signals.Measured in Hz.Hz — Frequency of an alternating signal. See Frequency.Keystone Correction— Device that will correct an image of the distortion(usually a wide-top narrow-bottom effect) of a projected image caused byimproper projector to screen angle.Laser Pointer— A small pen or cigar sized pointer that contains a small batterypowered laser, which can project a small, red (typically), high intensity beam oflight that is immediately very visible on the screen.