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■ What is Monitor / Video?
Monitor/Video products are
connection products utilizing various
video interfaces to transmit a
video signal.
■ How are Monitor / Video
products used?
The primary function of Monitor/
Video cables is the interconnection
between a signal generating device
such as a CPU (Central Processing
Unit) and a display device such as a
monitor. The interfaces used to make
this connection have evolved over the
years and include HD15, DVI, DFP,
EVC and HDMI just to name a few.
■ Where are Monitor / Video
products used?
Monitor/Video products are used in a
wide variety of video signal
transmission applications found in
both office and home environments
from computers to home
entertainment systems.
Monitor / Video Terms
Analog Signals: Both video and audio signals
that are continuously varying in level are
considered analog.
Amplitude
Analog
Signal
Time
Attenuation: Attenuation is the reduction in
the strength of a signal.
Bandwidth: The difference between the
upper and lower usable limits of a band of
frequencies.
Baseband: Unmodulated video or audio
signals with an exclusive transmission path.
Chroma: The color portion of a video signal
“C”.
Composite Sync: A combination of
horizontal and vertical sync pulses.
dB: A logarithmic unit of measure where 3dB
represents a doubling or halving the power
level from a given starting point.
DDC: (Data Display Channel) is a standard
that defines communication between a
monitor and a host system.
DVI : Digital Video Interface
Monitor / Video Tutorial
Digital Signals: Data presented as discrete
values i.e. On/Off or Binary.
Digital
Signal
Amplitude
Monitor / Video 43
Time
HDMI: High Definition Multimedia Interface.
All digital audio and video.
KVM: Keyboard, Video, Mouse. The three
major connections found on a typical desk
top computer set up.
Luma: The brightness portion of a video
signal (“Y”).
Pixel: A single point on a display.
Resolution: The density of pixels in a given
area typically expressed as the horizontal x
vertical values, (ex. 640x480).
Refresh Rate: Also referred to as the scan
rate. It is the number of times in one second
(Hz) that the electron beam travels across the
screen horizontally from one scan line to the
next.
RGB: Red, Green and Blue.
SVGA: Super Video Graphics Array (HD15).
S-Video: A video signal that separates the “Y”
or Luma and “C” or chroma information.
Standard VGA vs. VGA with DDC Comparison
A quick examination of the pinout tables listed shows the use of pins 9 and 15 in the
right hand column. A DDC enabled port can be easily identified by the royal blue
color of the insulator. New monitors with this implementation require the presence of
pins 9 and 15 to operate correctly.
VGA
Pin 1
VGA with DDC
Pin 1
Various DVI Configurations
A number of DVI connector interfaces that can be identified by the pin configurations
are shown here. They include DVI-A (analog only), DVI-D (digital only) and DVI-I
(analog and digital). In addition, single link and dual link configurations exist for
both DVI-D and DVI-I. Shown are the major configurations illustrating the
distinguishing features for each type of DVI interface.
ANALOG and DIGITAL ANALOG ONLY
DIGITAL ONLY
Pin Signal
1 Red
2 Green
3 Blue
4 ID Bit 2
5 Ground
6 Red Shield
7 Green Shield
8 Blue Shield
Pin 6
Pin 11
Pin Signal
9 NO CONNECTION
10 Sync Return
11 ID Bit 0
12 ID Bit 1
13 Horizontal Sync
14 Vertical Sync
15 NO CONNECTION
Common Computer Interfaces
Pin 15
Pin 6
Pin Signal
Pin Signal
1 Red
9 DDC +5V
2 Green
10 Sync Return
3 Blue
11 ID Bit 0
4 ID Bit 2
12 ID Bit 1
5 Ground
13 Horizontal Sync
6 Red Shield
14 Vertical Sync
7 Green Shield 15 ID Bit 3 or Data Clock
8 Blue Shield
DDC of VESA (Video Electronics Standard Association)
DVI-I Single Link
Three rows of 6 pins and two
contacts above and below
the flat blade.
DVI-I Dual Link
Three rows of 8 pins and two
contacts above and below
the flat blade.
Central Processing Unit (CPU)
The interconnection between a Central Processing Unit (CPU) and the Monitor,
Mouse, Keyboard and Speakers found in a typical desktop computer set up uses a
number of different interfaces. Below is a list of some of the more common types.
CPU to Monitor
DVI-A
One row of 5 pins, one row of
3 pins and one row of 4 pins
with two contacts above and
below the flat blade.
CPU to Mouse
Mini DIN 6
DVI-D Single Link
Three rows of 6 pins and no
contacts above or below the
flat blade.
DVI-D Dual Link
Three rows of 8 pins and no
contacts above or below the
flat blade.
Coming Soon!
Call 1-800-350-5266
for Details
HD15 DVI DFP EVC
CPU to Keyboard
Mini DIN 6
USB
Monitor
Keyboard
Mouse
Speakers
USB
CPU to Speakers
3.5mm
Display Port Cables
This next generation digital interface
features cutting edge technology
that will become the standard for
desktop and notebook PCs.
2008 Supplement Catalog 3.0
Shop at L-com.com or call 1-800-350-5266 E-mail: sales@L-com.com Fax: 978-689-9484