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INTERFACES
6
The VA6835FC has two key functions. It’s first
function is to amplify or buffer the signal to insure
that it is strong enough to travel distances of 100 ft
or farther through a coaxial cable. The second
function is to process the sync and to convert it to a
format that is acceptable to several 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 proper
cables. The VA6835FC 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. VA6835FC 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 that eliminates reflections
often caused by “Y” type monitor breakout cables.
There is no need to terminate the unused output.
The “termination” switch on the VA6835FC 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
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
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
VA6835FC 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 a 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 connectors by turning the “HV
Output” dip-switch to the ON position.
With these connectors, the VA6835FC can be
connected to compatible data projectors using
3 coax, 4 coax, or 5 coax cables.