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Installation and Operation, cont'd
2 — SOG (sync on green)
On — The interface outputs sync on green.
Off — The interface outputs both separate horizontal and
vertical sync (on the H and V connectors) and
composite sync (on the S connector) for RGBHV or
RGBS, respectively.
3 — Serr (serration pulse) — Many LCD and DLP projectors
and plasma displays, must have serration pulses removed
from the sync signal in order to be displayed properly.
Flagging or bending at the top of the video image is a sign
that the serration pulses should be removed.
On — The interface outputs serration pulses in the vertical
sync interval.
Off — The interface does not output serration pulses.
4 — Neg Sync — This switch controls sync polarity.
On — Both the horizontal and the vertical sync signals
are forced to negative polarity on output.
Off — Output sync polarity follows (is the same as) input
polarity.
5 — V Sync Width (vertical sync pulse width) — For some
digital display devices, if no picture appears, the picture
cuts in and out, or it is scrambled, try adjusting the output
vertical sync pulse width or switching from ADSP to DDSP.
On — The vertical sync pulse is narrow.
Off — The vertical sync pulse is wide.
6 & 7 — 75 Ohm (video input termination) — DIP switches
6 and 7 provide termination for video inputs 1 and 2,
respectively. Video termination can be accomplished by
using a laptop breakout cable, by connecting a termination
adapter or a local monitor to a monitor breakout cable
(MBC), by using an MBC buffer cable, or by setting a
termination switch on the interface.
DIP switches 6 and 7 provide a termination method to
prevent blooming when a monitor breakout cable is used
but no local monitor or termination adapter is connected.
On — The interface provides 75 ohm video input
termination.
Off — The interface provides high Z (high impedance)
video input termination.
RGB 202 Rx x x x x i i i i i , RGB 202 Rx x x x x i i i i i VTG • Installation and Operation
2-10
8 — No Backlight — This switch controls illumination of the
LCD backlight.
On — The LCD backlight is off, except for three seconds
at power-up.
Off — The LCD backlight is on while a signal is present at
the selected input.
BNC output connectors — These female BNC connectors are for
6
red (R), green (G), and blue (B) video output, and
horizontal (H), vertical (V). and composite (S) sync output.
Remote control connector — Connect a contact closure remote
7
control device or an RS-232 device (control system or PC
computer) to this 9-pin D female connector for remote switching
between inputs.
Software for RS-232 control is included with the interface. See
chapter 3, "Remote Control" for details.
Stereo audio output connector — This 3.5 mm, 5-pole captive
8
screw connector is for balanced audio output. See "Cabling" for
a wiring guide.
Cabling
The application diagram in this section shows how the system
looks when cabling is completed. Attach cables to the interface
as follows:
1.
Connect the computers' video outputs to the interface's
analog input male 9-pin D connectors on the
1
5
rear panel. These inputs have the following
6
9
DB9 Pin Locations
pin configuration:
Male
Pin
1
2
3
4
5
6
7
8
9
If the computers provide the audio input, laptop breakout
cables (LBCs) with audio can be used, or monitor breakout
cables (MBCs) with audio can be used to allow local
monitor output.
RGB 202 Rx x x x x i i i i i , RGB 202 Rx x x x x i i i i i VTG • Installation and Operation
Signal
Ground
No connection
Red video
Green video/sync
Blue video
No connection
No connection
Horiz. sync/composite sync
Vertical sync
2-11
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