Altinex VA6831FC Main RGBS/RGBHV Output Through 6 BNC Connectors, Input Selection Switch, Audio

INTERFACES

4.3 MAIN (RGBS/RGBHV) OUTPUT 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 main output of the VA6831FC is configured with six BNC connectors. By selecting the appropriate combinations, these outputs can provide RGsB, RGBHV, or RGBS output signals. RGsB type input signals are passed through only because the VA6831FC does not separate SYNC from the Green signal. With these connectors, the VA6831FC can be connected to compatible projectors using 4-coax cable for RGBS signals or 5-coax cable for RGBHV signals.

CONNECTOR	OUTPUT SIGNALS (6-BNC
	FEMALE)
Red	Red Video
Green	Green Video
Blue	Blue Video
Sync	Composite Sync
Horizontal	Horizontal Sync
Vertical	Vertical Sync

Table 6. VA6831FC Main Output pin-outs

4.4 INPUT SELECTION SWITCH

The selection of inputs between one and two are accomplished by using the Input Select Switch on the front panel. This switch has three positions: left, center, and right.

By switching to the left, the unit will select INPUT 1. By switching to the right, the VA6831FC will select INPUT 2. The center position is a REMOTE/AUTO mode.

The LED lights on each side of the Input Select Switch will indicate which input is selected.

If only one source is present and the Input Select Switch is in the VA6831FC’s AUTO mode, the unit will select the active input. An on LED will indicate the active input.

When two active sources are present and the Input Select Switch is on the REMOTE/AUTO position, the VA6831FC selects INPUT 2 as the default turning LED 2 red.

4.5 HORIZONTAL POSITION ADJUSTMENT

Most monitors and projectors have the ability to adjust the horizontal position of the image, but sometimes it is helpful to control this feature at the interface. This control is especially useful when multiple computers are switched to a single display if the Horizontal positions for each computer is slightly different.

The VA6831FC offers a horizontal position adjustment for each of the inputs. Turning the Horizontal Position Adjustment knob (blue color) located on each side of the INPUT SELECTION SWITCH will set the unit.

First, make sure that the CH1 Horizontal Delay and CH2 Horizontal Delay dip-switches are OFF.

With the interface Input Select Switch on REMOTE/AUTO (center position) and the Horizontal Position Control Switch centered, adjust the image using the monitor or projector’s Horizontal image position control. Then set the Input Select Switch to the desired input and adjust the Horizontal position of the image on the display with the VA6831FC’s Horizontal Position Control knob.

4.6 AUDIO

The VA6831FC accepts two balanced stereo audio inputs and offers one unbalanced stereo audio output. Please note that the audio signal will follow the video signal during switching, which means that in either manual selection or auto-switch mode, if Input 1 is active then both video and audio signals will be selected for this input.

4.7 BANDWIDTH

The minimum bandwidth of the VA6831FC is 350 MHz, and the typical bandwidth is 425 MHz. This high bandwidth allows the passing of a video signal’s third harmonic, thus ensuring a clean video signal. Indeed, the VA6831FC will be virtually transparent to the video signal.

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