VGA Video Graphics Array
VGA has for many recent years been the standard for computer video
signals. It uses a trapezoid shaped connector with three rows of five
ofset pins. When found on computers and monitors it is often colored
blue and indicated by a small image of a monitor.
The VGA connector can be called HD15 or DB15 When used in home
theater type applications it can also be labeled RGB.
VGA is an analog signal originally (in the late 1980’s) supported
resolutions of 640 x 480 then SVGA (Super VGA) supported 800 x 600.
Later upgrades include resolutions of 1024 x 768, 1280 x 1024 and
sometimes even up to 1600 x 1200.
The VGA standard originally replaced the old EGA
(black and green) monitors, the resolution and the added color was an
improvement, and later revisions increased both resolution and color
depth. If you are trying to get the best signal for your home
entertainment system VGA (RGB) is better than S-Video,
Composite RCA and Component RCA.
Not as good as
Many of the newer comptuers are now shipping with DVI
ports, which is an improvement over VGA, in resolutions and response
time, besides the fact that DVI is digital (less conversion) In home
entertainment both DVI and HDMI will have a clearer
uncompressed digital signal, however if your display does not support
digital, you will get the best signal from a VGA/RGB connection.
- TV’s (Esp High Definition)
- Home entertainment Set top boxes
- Game consoles (X box 360)
Since VGA is used for many different types of applications, there
are some stipulations to the conversions that are possible. What will
work in one instance, might not work in reverse.
Simple conversions reqire only a passive adapter or cable, there is
no active conversion simply differetn pinouts of the same signals.
Complex conversions require active circutry to convert the signal,
to change it to the new signal. These often only work one-way.
to VGA DVI-A (analog) is primarily used to maintain
support for VGA monitors, the two signals are interchangeable. But you
will need to make sure that you are using a DVI-A or DVI-I device (like
a computer graphics card
or a projector) DVI-D (digital only) to VGA is not a simple
here for more information about DVI
- VGA to
Component In Home theater the VGA or RGB signals
are largely interchangable with the Component RCA connections, so for
instance a VGA port on a big screen TV can be connected to the
Component RCA ports of a DVD player. Computer graphics cards in
some instances, can work with VGA to component cables to use a TV
as a monitor. For this to work the computer must be sending
TV compatible signals. (YPbPr, synch on green)
Complex conversions for VGA displays
- DVI-D to VGA Digital to analog conversion boxes
that will convert a digital only souce to analog VGA like our SW-4687
or one designed specifically for home theater SW-4486
- USB to
VGAthis converter will connect a VGA monitor to a USB port
on your computer, but the quality is arguable
Express/AGP to VGA You likely know that these are video
cards, but the concept is correct–you can connect a monitor to one of
these ports, with a VGA graphics card.
to VGA Not as many people know that this is possible, but
our VT Book will add a VGA port to a PCMCIA slot (also known as PC card
slot or cardbus slot) on a notebook computer.
- VGA splitters Video Splitters
will take one VGA output and actively boost and output to many
displays. It is perfect for presenting both on a local machine and a
projector or having a simultaneous displayed in many locations, for
example conference rooms, courtrooms, or a video display. VGA splitters
show only a mirrored display (Same thing on all screens) with a few
exceptions like the Matrox Dualhead
2 Go and the VT
book Dualhead cable.
- VGA Switches Switches will let you share one
display between multiple sources. They can be a KVM switch and share
a mouse keyboard etc. as well or switch VGA only
- Composite to VGA, Coaxial to VGA, S-Video to VGA
You can use a standard TV connection to a VGA display with a TV
Tuner. Essentialy turning your monitor or projector into a TV. The
standard tuner (USB or PCI) runs through your computer, but there are
also Standalone varieties, that connect directly to the VGA port of the