Dell Projector 7700 User Manual

Specifications111
 NOTE: The lamp life rating for any projector is a measure of brightness 
degradation only, and is not a specification for the time it takes a lamp to fail 
and cease light output. Lamp life is defined as the time it takes for more than 
50 percent of a lamp sample population to have brightness decrease by 
approximately 50 percent of the rated lumens for the specified lamp. The lamp 
life rating is not guaranteed in any way. The actual operating life span of a 
projector lamp will vary...

112Specifications
RS232 Pin Assignment
RS232 Protocol 
• Communication Settings 
• Command types
To pop up the OSD menu and adjust the settings.
• Control command Syntax (From PC to Projector)
[H][AC][SoP][CRC][ID][SoM][COMMAND] 
•Example: Power ON Command (Send low byte firstly)
--> 0xBE, 0xEF, 0x10, 0x05, 0x00, 0xC6, 0xFF, 0x11, 0x11, 0x01, 0x00, 0x01
•Control Commands List 
To view the latest RS232 code, go to the Dell Support site at: support.dell.com.
Connection settingsVa l u e
Baud Rate 19,200...

Specifications113
PIP Combination Sources
HDMI-A HDMI-B VGA-A VGA-B Component
HDMI-A No No Yes Yes Yes
HDMI-B No No Yes Yes Yes
VGA-A Yes Yes No No No
VGA-B Yes Yes No No No
Component Yes Yes No No No
S-Video Yes Yes No No No
Composite Yes Yes No No No
Wireless Display No No Yes Yes Yes
USB Display No No Yes Yes Yes
USB Viewer No No Yes Yes Yes
S-Video Composite Wireless 
DisplayUSB 
DisplayUSB 
Viewer
HDMI-A Yes Yes No No No
HDMI-B Yes Yes No No No
VGA-A No No Yes Yes Yes
VGA-B No No Yes Yes Yes...

114Specifications
Compatibility Modes (Analog/Digital) 
ResolutionRefresh Rate (Hz)Hsync Frequency 
(KHz)Pixel Clock (MHz)
 640 x 350  70.08731.46925.175
 640 x 480  59.94031.46925.175
 640 x 480 p60 59.940 31.469 25.175
 720 x 480 p60 59.940 31.469 27.000
 720 x 576 p50 50.000 31.250 27.000
 720 x 400  70.08731.46928.322
 640 x 480  75.00037.50031.500
 848 x 48060.00031.02033.750
 640 x 480  85.00843.26936.000
 800 x 600  60.31737.87940.000
 800 x 600  75.00046.87549.500
 800 x 600  85.06153.67456.250...

Contacting Dell115
Contacting Dell
For customers in the United States, call 800-WWW-DELL (800-999-
3355). 
 NOTE: If you do not have an active Internet connection, you can find contact 
information on your purchase invoice, packing slip, bill, or Dell product catalog. 
Dell™ provides several online and telephone-based support and service 
options. Availability varies by country and product, and some services may 
not be available in your area. To contact Dell for sales, technical support, 
or customer...

116Glossary
Appendix: Glossary
ANSI LUMENS — 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.
A
SPECT 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...

Glossary117
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 9 ft high and 12 ft 
wide, screen has a diagonal of 15 ft. This document assumes that the diagonal 
dimensions are for the traditional 4:3 ratio of a...

118Glossary
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.
Reverse Image — Feature that allows you to flip the image horizontally. When 
used in a normal...

Glossary119
the project 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.  

120Index
Index
A
Adjusting the Projected Image 26
Elevator button
 26
lower the projector
Elevator foot
 26
Tilt adjustment wheel
 26
Lowering the Projector Height
 
26
Raising the Projector Height
 26
Adjusting the Projector Zoom and 
Focus
 27
Focus ring
 27
Horizontal lens shift knob
 27
Lens shift lock
 27
Side door
 27
Vertical lens shift knob
 27
Zoom ring
 27
C
Changing the Lamp 106
Connecting the Projector
12 V DC Plug
 23
3 RCA to 3 RCA Component 
Video (Male to Male) cable
 
20
Composite Video...