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INTERFACES
4
VA6834FC DESCRIPTION 4
The VA6834FC has two key functions. Its first
function is to buffer the signal and insure that it is
strong enough to travel a distance of 100 ft or
longer through a coaxial cable. The second
function is to process the sync and to convert it into
a format that is acceptable to most displays.
4.1 COMPUTER VIDEO INPUT (VGA-
COMPATIBLE HD 15-PIN CONNECTOR).
The HD 15-pin connector input allows the
connection of a computer source to the interface
using Altinex input cables, which are available
for a variety of popular computers and graphics
cards on the market. These include VGA, MAC,
SUN, and SGI type video output connectors with
the proper cables. The VA6834FC input is
compatible with standard VGA cables.
PIN
No.
INPUT SIGNALS ON HD 15-PIN FEMALE
CONNECTOR
1
Red Video
2
Green Video
3
Blue Video
4
ID Bit (Grounded when ID Bit switch is ON)
5
Ground
6
Ground
7
Ground
8
Ground
9
No connection
10
No connection
11
ID Bit
12
ID Bit
13
Horizontal Sync/Composite Sync
14
Vertical Sync
15
No connection
Table 4. VA6834FC Input pin-out
4.2 LOCAL MONITOR OUTPUT (HD 15-PIN
CONNECTOR)
The HD 15-Pin connector output is used to
connect the local monitor to the interface. This is
a fully buffered output, eliminating reflections
often caused by “Y” type monitor breakout
cables. There is no need to terminate the
unused output. The termination switch on the
VA6834FC affects only the terminations of the
computer video input. The output is VGA
compatible, but can also be used to feed other
types of local monitors using designated Altinex
adapter cables such as VGA, MAC, SUN, SGI or
RGB.
PIN
No.
LOCAL MONITOR OUTPUT SIGNALS ON
15-PIN HD FEMALE CONNECTOR
1
Red Video
2
Green Video
3
Blue Video
4
ID Bit (Grounded when ID Bit switch is ON)
5
Ground
6
Ground
7
Ground
8
Ground
9
Composite Sync
10
No connection
11
ID Bit
12
ID Bit
13
Horizontal Sync
14
Vertical Sync
15
No connection
Table 5. Local Monitor Output pin-out
4.3 MAIN (RGBS/RGBHV) OUTPUTS THROUGH
6 BNC CONNECTORS
BNC connectors offer a reliable connection for
high-resolution video signals, and they facilitate
easy cable maintenance in the field. The
VA6834FC offers two main outputs with six BNC
connectors for each output. By selecting the
appropriate connectors, these outputs can
provide RG
S
B, RGBHV, or RGBS output signals.
For a RGsB type signal the “Sync on Green” dip
switch must be set to the ON position.
For an RGBHV type signal, you may either
connect cables to horizontal or vertical BNC
connectors or you may connect the horizontal
channel to the composite sync connector by
turning the HV OUTPUT switch to the ON
position. For a RGBS type signal output, the
cables should be connected to a composite sync
signal. With these connectors the VA6834FC
can be connected to compatible data projectors
using 3 coax, 4 coax, or 5 coax cables.