Product data

Clarity Visual Systems
September 1997
16
When an arc-lamp of this type is first turned on, the power supply has to produce between
4000 and 30,000 volts to heat the gas in the lamp to start the illumination reaction. As the gas
heats up, the voltage drops to the operating voltage of around 90 volts. If an attempt is made
to restart a hot lamp, the initial surge of high voltage will cause permanent damage to the lamp
– significantly reducing it’s life.
The 3 minute standby-delay prevents re-ignition of a hot lamp. By selecting the Lockout
Disable feature it is now possible to attempt to re-ignite a hot lamp.
Test Patterns
Brings up the following sub-menu that generates the full-screen patterns:
Test Patterns
[X] Off
[ ] White
[ ] Black
[ ] 50% Gray
[ ] Red
[ ] Green
[ ] Blue
[ ] Geometry
Most of these are self explanatory.
Off – allows the source data/video to be displayed
Geometry- displays a black background with a white grid pattern. The outside edge of
the image is a white line that is one line wide. Six pixels (lines) in from the edge is
another rectangle that is one line wide. This pattern is useful for mechanically
centering the LCD and verifying geometry issues.
Gamma Disable
Changes the gamma curve that the WN-5220-V electronics use to linearize what the LCD
displays. Basically, it changes the way the color information is displayed.
OEM Select
This feature selects the OEM name that is displayed in the About menu. The default setting of
000 sets the brand name to Clarity.