Altinex manual VA6822 DESCRIPTION, Interfaces, 4.1COMPUTER VIDEO INPUT VGA

INTERFACES

ELECTRICAL	AUDIO		VIDEO
SPECIFICATIONS
Input Signals
Level	0.1 to 4.8V	0.3 to 1.2V p-p for
	p-p		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		RGsB /RGBS/
	Main;		RGBHV
	Unbalanced		(pass-through)
	on Local
Level	0.1 to 4.8V	0.3 to 1.2V p-p for
	p-p		RGB video signal
		TTL (+/-) for H, V, or
			C sync signal. -
			0.3V for Sync on
			Green
Impedance	620 Ohms for	75 Ohms for video
	balanced; 50	signal; 22 Ohms for
	Ohms for		sync signal
	unbalanced
	on Local
	Monitor
Gain	0 dB	1.05
Equalization of		User adjustable 16-
Main Output	___		position through
			front panel
Equalization		25ft increment, up to
Range	___		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 350MHz
	minimum		for -3dB loss
Horizontal	___		20% through dial
Adjustment			on the Front

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	Position Range			Panel, 10%
				through remote H-
				position connector
	Power
	Power Input	100-240V AC, 50/60Hz, 0.4A
	Power		10 watts max.
	Consumption
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.

4.1COMPUTER 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	INPUT SIGNALS ON 15 PIN-HD FEMALE
No.	CONNECTOR

1Red Video

2Green Video

3Blue Video

4ID Bit 2

5SCL/SDA ID Bit Reference/ Return

6Ground

7Ground

8Ground

9Vesa +5V

10Sync Return

11ID Bit 0

PIN	INPUT SIGNALS ON 15 PIN-HD FEMALE
No.	CONNECTOR

12SDA – DDC Data

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