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Installation and Operation, cont'd
LCD Display
The RGB 202 Rxi and RGB 202 Rxi VTG's front panel LCD
display serves two main functions: to display the scanning rates
of the input signal, and to indicate the horizontal and vertical
centering limits. During VTG operation, the RGB 202 Rxi VTG's
LCD displays the VTG format, resolution and refresh rates.
LCD screen backlight
The LCD screen lights for 15 seconds at power-up, and it stays
backlit as long as an input signal is present at the selected input.
To force the backlight to remain off at all times except at power-
up, set the rear panel No Backlight DIP switch to On.
See page 2-11 for details.
Scan rate indication
When the interface is powered on, the LCD lights for 15 seconds
while it determines whether an input sync signal is present. If
the No Backlight DIP switch is set to On, the LCD lights for
three seconds only.
•
If the interface does not detect an input sync signal, the
LCD goes dark and displays "NO SIGNAL" until the
interface receives an active sync signal.
•
If the interface detects an input sync signal, the LCD
displays the horizontal and vertical scan rates (sync
frequencies) in the following format:
Hxxx.xxk
Vxxx.xHz
The first line shows the horizontal rate in kilohertz, and
the second line shows the vertical rate in Hertz.
Centering
While the vertical ( ) or horizontal (
controls are being adjusted, the LCD displays "H-SHIFT" or
"V-SHIFT", respectively. That message remains on the LCD (in
place of the scan rates) until the centering control has been
inactive for 3 seconds. When a centering control reaches its
minimum or maximum limit, the LCD displays "MIN" or
"MAX" on the line below "H-SHIFT" or "V-SHIFT".
If the centering controls are no longer active, the centering
settings are saved, and the LCD displays the current scan rates.
If the DDSP DIP switch is set to On and a centering control is
rotated, the LCD displays N/A DDSP ON, and the image does
not shift on screen.
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
2-14
) centering (shift)
Operating the VTG (RGB 202 Rxi xi xi xi xi VTG only)
The RGB 202 Rxi VTG includes a limited video test generator.
The VTG creates and outputs standard test patterns at fixed
formats and resolutions so that a system can be set up and
tested even when an input computer is not available.
To use the VTG, follow these steps:
1.
Set the front panel 202/VTG selection switch to VTG.
2.
Select an appropriate combination of output resolution
and test pattern using the 16-position rotary switch on the
front panel. Four different video test patterns are available
for each of the four resolutions. Select the test patterns by
rotating the switch within the appropriate resolution
quadrant. The LCD displays the selected VTG format, the
resolution, and then the scan rates.
The test patterns are shown below.
Left to right: crosshatch, H-pattern, 8 split-level
grayscale, and 8 color bar test patterns
The four available resolutions are shown below.
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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
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2-15
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