Operation

INTERFACES

The settings of the VA6834FC Interface can be adjusted using the dip-switches in Table 4. There are no other adjustments necessary to operate the unit. The VA6834FC will operate successfully as long as cables are attached properly and technical specifications are followed.

the boot up stage of the computer. If your computer does not output video, place the I.D. Bit switch in the ON position and reboot the computer. When in the OFF position, the ID Bit will be passed through the Local Monitor Output port.

7.4 SYNC ON GREEN OUTPUT SWITCH

DIP SWITCH

Serration

HV Output

Sync on Green

Termination

ID Bit

Not Used

OFF

In some systems the ability of the VA6834FC to output Sync on Green can be a very helpful feature. It is important to know that the VA6834FC will not separate the sync signal from the green signal if the input is RGsB. It simply amplifies the composite sync signal and passes it through. The VA6834FC will combine the sync

Table 6. Dip switches default setting

7.1 SERRATION PULSE SWITCH

Certain monitors and projectors will exhibit better stability when the serration pulse switch is ON. This switch is seldom used and in most circumstances should be turned OFF.

7.2 H&V OUT SWITCH

When the composite sync channel is used and RGBS format is desired from the VA6834FC, the H & V OUT switch should be turned off. When this switch is turned on, the sync. The connector will output horizontal sync, but not composite sync. The horizontal sync can be connected to the sync connector and the vertical sync signal is connected to the vertical connector using the H & V OUT switch in the ON position.

7.3 I.D. BIT SWITCH

Many computers use ID Bits or Sense Pins to recognize the connection of a monitor to its video output port. Often, these ID Bits will even allow the computer to recognize the type of monitor connected in terms of its scan rate compatibility. When the I.D. Bit switch is in the ON position, the VA6834FC allows the main ID Bit (pin 4 on the input connector) to be connected to the ground signal. This is used primarily when interfacing to laptop computers to imitate the presence of a local monitor. Typically, this recognition will take place during

signal and the green channel to output a RGsB signal when the SYNC ON GREEN dip-switch is in the ON position even if the input is in RGBS or RGBHV format. If the desired output is RGBS or RGBHV, then leave the SYNC ON GREEN dipswitch in the OFF position.

7.5 TERMINATION SWITCH

When the built-in termination switch is set to the ON position, the input of the interface will be terminated. As a rule, the termination switch should be ON. This switch does not affect the termination of any output signal. The termination switch should be left in the OFF position if a “Y” cable is used at the local monitor output connector.