Installation and Operation, cont’d
properly. Flagging or bending at the top of the video image is a sign that the serration pulses should be removed.
ON — When this switch is set to On, serration pulses will be output in the vertical sync interval.
OFF — When this switch is set to Off, serration pulses will not be output.
4 — 75 Ohm (video input termination) — RGB 138xi only — Video termination is accomplished in a number of ways when using a universal interface like the RGB 138xi:
1.Setting the 75 ohm termination switch on the interface when using an MBC cable without a local monitor attached,
2.Using a laptop breakout cable (LBC) connected to a laptop or desktop computer with no local monitor,
3.Connecting a local monitor to the breakout from an MBC cable,
4.Using a termination adapter with an MBC cable and no local monitor attached, or
5.Using an MBC buffer cable.
The input to the interface is high impedance, and for the video signal to be at a proper level (not blooming) 75 ohm termination is needed for the computer signal. The switch provides a method
SOG DDSP SERR 75 Ohm | of termination to prevent blooming | |
when a monitor breakout cable is used | ||
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ON — The RGB 138xi provides 75 ohm video input termination.
OFF — The RGB 138xi provides Hi Z (high impedance) video input termination.
4 — SPARE — RGB 158xi only
SOG DDSP SERR SPARE | This DIP switch does not have a | |
function in the RGB 158xi. | ||
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5BNC output connectors — These BNC female connectors are for red, green, and blue video output, and horizontal, vertical and composite sync output.
6Stereo audio output connector — This 3.5 mm,
Setting Internal Jumpers
The jumpers inside the interface(s) are set at the factory to meet the requirements of most systems. However, you can change a jumper setting to meet the needs of a particular system.
Changes to internal jumper settings must be performed by authorized service personnel only.
The
•horizontal and vertical sync polarity, and
•vertical sync pulse width.
Follow these steps to change the jumper settings. The RGB 138xi is shown for illustration, but the steps apply to both models.
1.Remove power from the interface (if it is connected) by
disconnecting the AC power cord from the unit.
2.Open the cover of the interface (the top half of the enclosure), as shown below. Remove the screws from the enclosure, and lift the cover straight up.
Do not touch any switches or electronic components inside the interface. Doing so could damage the interface.
Remove (12)
Screws
UNSWITCHED
. MAX WATTS 600
Lift Cover
Straight Up
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Opening the interface cover |
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RGB 138xi, RGB 158xi | Installation and Operation | ||||||||||||