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INTERFACES
4
4
ELECTRICAL
SPECIFICATIONS
AUDIO VIDEO
Input Signals
Level 0.1 to 4.8V
p-p
0.3 to 1.2V p-p for
RGB video signal
TTL (+/-) for H, V, or
C sync signal. -
0.3V for Sync on
Green
Impedance 10k Ohms 75 Ohms (±1%) for
video signal; 10k
Ohms for sync
signals
Output Signals
Type Balanced on
Main;
Unbalanced
on Local
RGsB /RGBS/
RGBHV
(pass-through)
Level 0.1 to 4.8V
p-p
0.3 to 1.2V p-p for
RGB video signal
TTL (+/-) for H, V, or
C sync signal. -
0.3V for Sync on
Green
Impedance 620 Ohms for
balanced; 50
Ohms for
unbalanced
on Local
Monitor
75 Ohms for video
signal; 22 Ohms for
sync signal
Gain 0 dB 1.05
Equalization of
Main Output ___
User adjustable 16-
position through
front panel
Equalization
Range ___
25ft increment, up to
300ft with super
high resolution
cable
Target Frequency ___ Mid to high up to
350MHz
Frequency Compatibility
Frequency 20Hz to 20kHz Horizontal sync –
15 to 130kHz;
Vertical sync – 25
to 180Hz
Bandwidth 20kHz
minimum
Minimum 350MHz
for -3dB loss
Horizontal
Adjustment
___
20% through dial
on the Front
Position Range Panel, 10%
through remote H-
position connector
Power
Power Input 100-240V AC, 50/60Hz, 0.4A
Power
Consumption
10 watts max.
Table 3. VA6822 Electrical Specifications
VA6822 DESCRIPTION 4
The VA6822 has two key functions. First, it
amplifies (buffers) the input video and audio signal
so that it is strong enough to travel long distances
up to 350ft through high quality cables to a distant
display and audio receiver. The second function of
the VA6822 is to process the incoming sync signal
and convert it to a format that is accepted by a
projector. The computer and projector should be
scan-rate compatible.
4.1 COMPUTER VIDEO INPUT (VGA-
COMPATIBLE 15-PIN HD CONNECTOR)
The 15-pin HD connector input allows the
connection of a computer to the system interface
using ALTINEX-made input cables which are
available for a variety of popular computers and
graphics cards on the market such as VGA, MAC,
SUN, and SGI. The input of the VA6822 is
compatible with VESA standard-VGA/XGA, which
is shown below.
PIN
No.
INPUT SIGNALS ON 15 PIN-HD FEMALE
CONNECTOR
1
Red Video
2
Green Video
3
Blue Video
4
ID Bit 2
5
SCL/SDA ID Bit Reference/ Return
6
Ground
7
Ground
8
Ground
9
Vesa +5V
10
Sync Return
11
ID Bit 0
PIN
No.
INPUT SIGNALS ON 15 PIN-HD FEMALE
CONNECTOR
12
SDA – DDC Data