Dell M409WX Projector Users Guide

							Glossary41
Appendix: Glossary
ANSI Lumens —A standard for measuring light output, used for comparing 
projectors. A standard for measuring the brightness. It is calculated by dividing a 
square meter image into nine equal rectangles, measuring the lux (or brightness) 
reading at the center of each rectangle, and averaging these nine points.
Aspect Ratio —The most popular aspect ratio is 4:3 (4 by 3). Early television and 
computer video formats are in a 4:3 aspect ratio, which means that the width of 
the image is 4/3 times the height.
Brightness— The amount of light emitting from a display or projection display or 
projection device. The brightness of projector is measured by ANSI lumens.
Color Temperature— The color appearance of white light.  Low color 
temperature implies warmer (more yellow/red) light while high color temperature 
implies a colder (more blue) light.  The standard unit for color temperature is 
Kelvin (K).
Component Video—A method of delivering quality video in a format that 
contains all the components of the original image. Consists of the luminance 
signal and two separate chrominance signals and are defined as YPbPr for analog 
component and YCbCr for digital component. Component video is available on    
DVD players and projectors.
Composite Video — A video signal that combines the luma (brightness), chroma 
(color), burst (color reference), and sync (horizontal and vertical synchronizing 
signals) into a signal waveform carried on a single wire pair. There are three kind of 
formats, namely, NTSC, PAL and SECAM.
Compressed Resolution— If the input images are of greater resolution than the 
native resolution of the projector, the resulting image will be scaled to fit the 
native resolution of the projector.  The nature of compression in a digital device 
means that some image content is lost.
Contrast Ratio— Range of light and dark values in a picture, or the ratio between 
their maximum and minimum values. There are two methods used by the 
projection industry to measure the ratio:
1Full  On/Off — measures the ratio of the light output of an all white image (full 
on) and the light output of an all black (full off) image. 
2ANSI — measures a pattern of 16 alternating black and white rectangles. The 
average light output from the white rectangles is divided by the average light 
output of the black rectangles to determine the 
ANSI contrast ratio. 
Full On/Off contrast is always a larger number than ANSI contrast for the same 
projector. 
						

							42Glossary
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 common 
logarithm of the ratio of the two levels. 
Diagonal Screen— A method of measuring the size of a screen or a projected 
image. It measures from one corner to the opposite corner. A 9FT high, 12FT 
wide, screen has a diagonal of 15FT. This document assumes that the diagonal 
dimensions are for the traditional 4:3 ratio of a computer image as per the example 
above. 
DLP
®— Digital Light Processing™—Reflective display technology developed by 
Texas Instruments, using small manipulated mirrors. Light passes through a color 
filter is sent to the DLP mirrors which arrange the RGB colors into a picture 
projected onto screen, also known as DMD.
DMD— digital Micro- Mirror Device— Each DMD consists of thousands of 
tilting, microscopic aluminum alloy mirrors mounted on a hidden yoke.  
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. 
HDMI— High Definition Multimedia Interface, carry both uncompressed high 
definition video along with digital audio and device control data in a single 
connector. 
Hz — Hertz, unit of frequency.
Keystone Correction— Device that will correct an image of the distortion 
(usually a wide-top narrow-bottom effect) of a projected image caused by 
improper projector to screen angle.
Laser pointer— A small pen or cigar sized pointer that contains small battery 
powered laser, which can project small, red (typically), highly intensity beam of 
light that is immediately very visible on the screen
Maximum Distance— The distance from a screen the projector can be to cast an 
image that is useable (bright enough) in a fully darkened room. 
Maximum Image Size— The largest image a projector can throw in a darkened 
room. This is usually limited by focal range of the optics. 
Minimum Distance— The closest position that a projector can focus an image 
onto a screen.
NTSC— National Television Standards Committee.  North American standard for 
video and broadcasting, with a video format of 525 lines at 30 frames per second.
PAL— Phase Alternating Line.  A European broadcast standard for video and 
broadcasting, with a video format of 625 lines at 25 frames per second. 
						

							Glossary43
Reverse Image— Feature that allows you to flip the image horizontally. When 
used in a normal forward projection environment text, graphics, etc, are 
backwards. Reverse image is used for rear projection.
RGB— Red, Green, Blue— typically used to describe a monitor that requires 
separate signals for each of the three colors.
S-Video—A video transmission standard that uses a 4-pin mini-DIN connector to 
send video information on two signal wires called luminance (brightness, Y) and 
chrominance (color, C). S-Video is also referred to as Y/C.
SECAM— A French and international broadcast standard for video and 
broadcasting, closely related to PAL but with a different method of sending color 
information.
SVGA— Super Video Graphics Array— 800 x 600 pixels count.
SXGA— Super Extended Graphics Array—1280 x 1024 pixels count.
UXGA— Ultra Extended Graphics Array—1600 x 1200 pixels count.
VGA— Video Graphics Array—640 x 480 pixels count.
WXGA— Wide Extended Graphics Array—1280x800 pixels count.
XGA— Extended Graphics Array— 1024 x 768 pixels count.
Zoom Lens— Lens with a variable focal length that allows operator to move the 
view in or out making the image smaller or larger. 
Zoom Lens Ratio— Is the ratio between the smallest and largest image a lens can 
projector from a fixed distance. For example, a 1.4:1 zoom lens ratio means that a 
10 foot image without zoom would be a 14 foot image with full zoom.  
						

							44Index
Index
A
Adjusting Projection Image Size 16
Adjusting the Projected Image
 14
Adjusting the Projector Height
 
14
Elevator button
 14
Elevator foot
 14
Tilt adjustment wheel
 14
Adjusting the Projector Zoom and 
Focus
 15
Focus ring
 15
Zoom tab
 15
C
Changing the Lamp 35
Connecting a Computer
Power cable
 8
USB to USB cable
 8
VGA to VGA cable
 8
Connecting a DVD Player
Using a Component Cable
 11
D-sub to YPbPr cable
 11
Power cable
 11
Using a Composite Cable
 10
Composite video cable
 10
Power cable
 10
Using an HDMI Cable
 12
HDMI cable
 12
Power cable
 12
Using an S-video Cable
 9Power cable
 9
S-video cable
 9
Connection Ports
Audio input connector
 7
Audio output connector
 7
HDMI input connector
 7
Power cable connector
 7
Security cable slot
 7
S-video input connector
 7
USB remote connector
 7
VGA input connector
 7
Video input connector
 7
Contact Dell
 5, 18
Contacting Dell
 40
Control Panel
 17
Enter button
 19
Left/ Source
 19
MENU
 19
D
Dell
Contacting
 40
G
Guiding Signals 34
M
Main Unit 6 
						

							Index45
Control panel 6
Elevator button
 6
Focus ring
 6
IR receiver
 6
Lens
 6
Zoom tab
 6
O
On-Screen Display 21
Auto-Adjust
 22
DISPLAY (in PC Mode)
 24
DISPLAY (in Video Mode)
 25
Input Select
 21
LAMP
 26
LANGUAGE
 27
Main Menu
 21
Other
 27
PICTURE (in PC Mode)
 23
PICTURE (in Video Mode)
 23
Set Up
 22
P
Phone numbers 40
Powering On/Off the Projector
Turning Your Projector Off
 13
Turning Your Projector On
 13
R
Remote Control 19
S
SpecificationsAudio
 38
Brightness
 37
Color Wheel Speed
 37
Compatibility Modes
 39
Contrast Ratio
 37
Dimensions
 38
Displayable Color
 37
Environmental
 38
I/O Connectors
 38
Lamp
 37
Light Valve
 37
Noise Level
 38
Number of Pixels
 37
Power Consumption
 37
Power Supply
 37
Projection Distance
 37
Projection Lens
 37
Projection Screen Size
 37
Regulatory
 38
Uniformity
 37
Video Compatibility
 37
Weight
 38
Support
Contacting Dell
 40
T
Telephone numbers 40
Troubleshooting
 31
Contact Dell
 31