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INTERFACES
3
ABOUT YOUR INTERFACE 2
There are several varieties of computers and
computer video cards on the market today. There
are also numerous data monitors and large screen
data projectors. When displaying a computer
image on a large screen data projector or on a
large screen monitor, it often becomes clear that
some computers are not always compatible with
these display devices. The
VA6831FC
is a
computer video interface designed to resolve this
incompatibility.
The
VA6831FC
is a dual input-switchable computer
video interface. It is designed to interface up to two
VGA, SVGA, XGA, UXGA, MAC, SUN, or SGI
computer video sources to one scan-rate
compatible presentation monitor or data projector.
Each of the inputs can be connected to different
types of computers simultaneously. The
VA6831FC
will amplify video signals and convert the sync
portion of the signal to the desired format.
It is important to understand the general
capabilities of interfaces.
Interfaces do not change
the scan-rate or the resolution of the video signal.
An interface simply converts a computer video
signal to a pre-selected analog format. The source
(computer) and display (projector or monitor) must
be scan-rate compatible.
The
VA6831FC
is a state-of-the-art piece of
equipment with an exceptional combination of
advanced features and very competitive pricing
.
TECHNICAL SPECIFICATIONS 3
FEATURES/DESCRIPTION VA6831FC
GENERAL
No. of Inputs
2 Audio Inputs + 2
Video Inputs
Computer Input Connector Two, 15pin HD Female
Stereo Audio Input
Connector
Two, 5 position
Terminal Blocks
No. of Outputs
2 Local Monitor Output
+ Main Video Output +
Stereo Audio Output
Local Monitor Output
Connector
Two, 15-pin HD
Female
Main Video Output
Connector
One, 6 BNC
Stereo Audio Output
Connector
One, 3 position
Terminal Block
Compatibility
VGA/
SVGA/XGA/UXGA
Compatible Signals,
Apple/MACII/Quadra/G
3 Signals, Sun/SGI
Workstations
Table 1.
VA6831FC
General
MECHANICAL VA6831FC
Width (inches) 8.50in (216mm)
Height (inches) 1.75in (44mm)
Depth (inches) 4.93in (125mm)
Weight (pounds) 2.0lbs (0.91kg)
Ship Weight (pounds) 2.8lbs (1.27kg)
Material 0.1" Aluminum
Finish Gray
Faceplate Lexan
T
°
Operating 10
°
C-35
°
C
T
°
Maximum 50
°
C
Humidity Technical
90
%
non-condensing
MTBF (calculations) 40,000hrs
Table 2.
VA6831FC
Mechanical
ELECTRICAL VA6831FC
Input Video Signals
Analog Signal 0.3 to 1.2 Volt p-p
Impedance 75 Ohms
Input Sync Signals
Horizontal, Vertical, & C-Sync TTL(+/-)
Sync on Green -0.3V
Impedance 10 k Ohms
Audio Input Signals
Type Differential
CMRR >80dB @ 10 Hz to 20
kHz
Impedance 10 k Ohms
Voltage 10 V p-p, +/-5 Volts
Output Video Signals
Analog Signal 0.77 V p-p
Impedance 75 Ohms
Output Sync Signals
Composite Sync TTL(+/-)
Sync on Green -0.3V
Impedance 22 Ohms
Audio Output Signals
Type Single Ended
Impedance <22 Ohms (drives 600