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Installation and Operation, cont'd
202 (interface)/VTG selection switch
6
(RGB 202 Rxi VTG only) — Use this switch to select the output
signal's source
202 = The image from the interface (from input 1 or
input 2) will be displayed.
VTG = A test pattern generated by the VTG (video test
generator) will be displayed.
When this switch is set to VTG, signals from input1 and
input 2 are ignored; the interface's internal VTG
provides a test pattern in place of the computer video
input. Input selection (selection of input 1 or input 2)
cannot be performed until the 202/VTG selection switch
is set to 202.
LCD display — This backlit LCD shows the horizontal and
7
vertical scanning frequencies. While centering adjustments are
being made, the LCD displays H-SHIFT or V-SHIFT, and it
indicates the horizontal or vertical shift minimum or maximum
limit when a centering limit has been reached. If DDSP is on
and the horizontal or vertical centering control is rotated, the
LCD displays N/A DDSP ON.
While the VTG is active (RGB 202 Rxi VTG only), the LCD
displays the current format, resolution and scan rate settings.
See the "LCD Display" section for details.
The backlight turns on at power-up, and it remains on for
15 seconds if a signal is not present at the selected input. If a
signal is present, the backlight will remain on at all times.
However, if the rear panel No Backlight DIP switch is set to On,
the backlight will turn on for only three seconds at power-up,
then it will remain dark even when an active signal is present.
Input selection switch and LEDs — Use this toggle switch to
8
select between input 1 and input 2. The LED corresponding to
the selected input lights, and the switch returns to the center
position automatically.
A remote contact closure switch, a computer, or an RS-232
control system connected via the rear panel 9-pin D port can be
used instead of this switch.
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
2-8
Rear Panel
The features described in this section apply to both models.
100-240
0.2A
1
AUDIO
ANALOG
2
INPUT
MBC
POWER
1
2
ANALOG
OUTPUT
9VDC
INPUTS
50/60 Hz
1
2
3
4
AC power connector — Connect a standard IEC AC power
1
cord here for power input (100VAC to 240VAC, 50/60 Hz) to the
internal, autoswitching power supply.
MBC power connectors — These 2.5 mm mini jacks supply
2
9VDC power for buffered monitor breakout cables (MBCs).
Connect the MBCs' power plugs here.
Analog computer-video inputs 1 (top) and 2 (bottom) —
3
Connect the source computers to these 9-pin D male connectors.
Adapters and monitor breakout cables are available from Extron
for use with SGI, Sun, and Macintosh computers.
Audio inputs 1 and 2 — Connect audio cables from the source
4
computers to these 3.5mm mini stereo jacks for unbalanced
audio input. See "Cabling" in this chapter for a wiring diagram.
DIP switches — This bank of DIP switches controls DDSP
5
(Digital Display Sync Processing), SOG (sync on green) output,
serration pulse output, sync polarity, vertical sync width, video
termination (high Z/75 ohm), and backlight illumination.
The default for all DIP switches is Off (down).
1 — DDSP (Digital Display Sync Processing)
This feature may be necessary for digital display devices
such as LCD, DLP (digital light processing) and plasma
displays. Use this option if the image is not displayed
properly after other options, such as serration pulse and
video termination changes, have been explored.
On — The interface uses DDSP instead of ADSP.
DDSP does not process the sync signal.
DDSP disables horizontal and vertical centering
controls.
Off — The interface performs sync processing operations,
such as centering, with ADSP.
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
REMOTE
R
G
B
H
V
S
OUTPUTS
5
6
7
8
2-9
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