Operation

Use the lamp mode that best suits your brightness needs. For example, in a tiled application you may want to precisely match brightness levels between adjacent images-choose Intensity for each projector, then judge by eye and set each individual intensity setting as necessary (see "Constant Intensity", below). Or you may simply always need as much brightness as possible-choose Max Output.

Lamp modes are described below:

Max Output: The lamp will always burn as brightly as possible, driven by maximum power of 700W (VX-4c) and 1200W (VX-6c). Keep in mind that the "maximum bright- ness" for any lamp gradually diminishes with age - the image will become dimmer over time. Its current output level appears in the "Constant Intensity" option (not in lumens).

Constant Intensity: Brightness will remain at a specified level for as long as possible. Once you select this option, enter a number representing the intensity level (brightness) you wish to maintain. Note this value is a correlation only (0-9999), not actual lumen levels pos- sible (0-3000, e.g.). See "Constant Intensity” below.

Constant Power: The power supplied to the lamp will remain at a desired watt level throughout the life of the lamp. Once you select this option, enter the number of watts rep- resenting the power level you wish to maintain. See "Constant Power" below.

CONSTANT POWER: The number shown here indicates how many watts are applied to the lamp. Set from 450-700W (VX-4c) and 800-1200W (VX-6c) as desired, keeping in mind that lower power levels produce dimmer images. When in "Constant Power" or Max Output modes, the power level remains constant. When in "Constant Intensity" mode, the power level will change as necessary. Specifying a power level of 700 is the same as operating in Max Output mode.

NOTES: 1) Power level can be set only if the lamp is in "constant power" mode. 2) If you are in "Intensity" mode, the power level value will automatically increase over time as necessary to maintain the desired brightness, until power reaches 700W.

CONSTANT INTENSITY: This number is a representation of the current brightness of your lamp, decreasing over time when you are operating at Max Output or at a specific Power level. However, when you are operating in "Constant Intensity" mode, this value remains at the orig- inal "IN" setting chosen.

NOTE: The number shown for "constnat intensity" is not the actual lumen output, but rather a correlated value only-9999 may represent 3000 lumens, for example.

To use "Constant Intensity" mode, judge by eye and set the level as desired for your application, remembering that higher settings can significantly shorten lamp life. Over time, the projector will automatically increase the power supplied to the lamp as needed to maintain the chosen intensi- ty to within 5% of the setting. This is called "brightness tracking".

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