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Section 3: Operation
When in either Power or Max Brightness modes, the power level remains constant. Specifying a
maximum power level here is the same as operating in Max Brightness mode, and will shorten lamp life.
NOTE: Power level can be set only if the lamp is in "Power" mode.
Intensity
This value and slidebar represents the current brightness of your lamp, decreasing over time when you are
operating in Max Brightness mode or at a specific Power level. When you are operating in Intensity mode,
this value remains at the original Intensity setting chosen and cannot be adjusted.
NOTE: The number shown for "intensity" is not the actual lumen output, but rather a correlated value only,
1246 may represent 3500 lumens, for example.
To use Intensity mode, judge by eye or meter and set the level as desired for your application. Over time, the
projector will automatically increase the power supplied to the lamp as needed to maintain the chosen intensity
as closely as possible. This mode is known as "Brightness Tracking" or "LiteLOC™".
How Long Can I Maintain Brightness?
Software can maintain your "Intensity" setting until the required power exceeds the maximum rating for the
lamp (2.0, 3.0, 4.5, or 6.0 kW) by approximately 10%. The lower the setting, the longer it takes to reach this
threshold, and the longer you can maintain the desired brightness. Keep in mind that once the lamp power
reaches its maximum wattage (see Power, above), this tracking is no longer possible. At this point, the lamp
gradually dims as usual, even though your original "Intensity" value still appears in the menu. To resume
accurate tracking, reduce the intensity setting so that the resulting "Power" value is less than its maximum-the
lower the intensity, the longer it can be maintained.
For example, a 1000-watt lamp (6.0 kW) can be safely driven at no more than 1000 watts. To produce desired
brightness at the screen, a new lamp would likely need less than this maximum rating, perhaps 812 watts
(example only). Over time, however, the lamp requires more and more current in order to generate the desired
light, until eventually the lamp wattage reaches its 1000 "overdrive" maximum, and the lamp power
automatically levels off. At this point, the tracking function terminates (i.e., the power level stabilizes) and the
lamp begins to dim normally. Either reduce your "Intensity" setting or replace the lamp.
Do not lower the "Intensity" so much that the corresponding "Power" value reaches its minimum and the
intensity setting is inaccurate, and cannot be maintained. For best results in achieving uniform intensity
amongst tiled images, choose an "Intensity" setting that enables all lamps to operate at less than the maximum
number of watts available in your projector , but high enough to keep the corresponding lamp power above its
minimum. See Power, above.
NOTES: 1) Lamps become more stable over time, thus a specific intensity is more easily maintained as the
lamp ages. 2) Intensity can be set only if the lamp is in "Intensity" mode 3) Intensity cannot exceed the
output of Max Brightness mode. 3) Intensity cannot exceed the output of Max Brightness mode.
Optical Aperture
This option is also available under the Advanced Image Settings menu. Refer to
Image
for details.
Lamp History
This read-only option lists the lamps most recently installed and recorded in the projector.
Lamp History automatically updates whenever you record a new lamp serial number-the
new lamp is added to the bottom of the list.
3-64
Section 3.5 Adjusting the
Roadster, Matrix WU, Mirage S+/HD/WU User Manual
020-100002-06 Rev. 1 (04-2011)
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