WolfVision VZ-17 - Manual (Page 11)

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Please note that LCD- or DLP-projectors require some special adjustments for perfect projection of a Visualizer image:
DETAIL / SHARPNESS Enhancers
Nearly all LCD- or DLP-projectors have a built-in sharpness enhancer for video signals. The level of this sharpness
enhancement is adjustable with a setting called DETAIL (on most projectors). Please note that for the readability
of small characters a LOW detail setting for Visualizer images is better!
CONTRAST / BRIGHTNESS
With the standard setting of many LCD- or DLP-projectors the picture is too bright if black text on a white background
is being projected. There are 3 possible ways of correcting this problem:
Option 1: Close the Visualizer's iris slightly with the IRIS dark key (#19). This is the quickest solution but it is
only temporarily, because once you press a zoom key the unit switches back to autoiris and the
picture will be as bright as before.
Option 2: Reduce the standard auto iris level in the units menu (#23) - see help menu (#25) for details. This will
keep the iris level permanently lower than usual. However this has the disadvantage that the output picture
may be too dark for other units connected to the Visualizer (e.g. monitor, video recorder, computer)
Option 3: Reduce the brightness of your LCD- or DLP-projector. Better projectors can store individual brightness
settings for each input. So an ideal setting for the Visualizer input can be made, while keeping the setting
for the other inputs (e.g. computer, video recorder).
To make the ideal LCD-/DLP-projector adjustment for Visualizer projection, we recommend to put a white sheet of
paper with text and some objects with different colors on the working surface. Keep an eye on the readability of the
text and the accuracy of the colors.
In order to check how the actual output signal of a Visualizer looks, we recommend to connect a CTR monitor (not
an LCD monitor!) to the Visualizer and use the monitor picture as reference image.
WINDOW Function (only for certain projectors)
SPECIAL ADJUSTMENT OF LCD-/DLP-PROJECTORS
Image up-calculated to
panel resolution Image with "window"
function
FREEZE FUNCTION
(VZ-47 only!)
By pressing the FREEZE-key (#15) of the VZ-47 the current image is stored and remains on the projection screen
or monitor. Pressing the FREEZE-key once again switches the Visualizer back to live picture. When the picture is
frozen the FREEZE key on the control panel is illuminated red.
Please note that some LCD- or DLP-projectors also have a freeze function, so if you can not switch back to live
image by pressing the FREEZE-key again, it is possible that the image is frozen on the projector.
The Visualizers output a picture of approx 752x582 pixels
(depending on model). Most modern LCD-/DLP-projectors
have a NATIVE RESOLUTION of 1024x768 pixels. In order to
display the Visualizer image on the full screen size the
projectors up-calculate the image to their panels pixel size.
Most projectors do this conversion perfectly, however with
some projectors some picture quality is lost in this process.
That is why some projectors have a "Window"-function. With
this function only as
many pixels of the display as required for
the video picture are used and the image is not "blown up" to
the full panel size.
TEXT ENHANCEMENT
(all Visualizers)
IMPORTANT
For improving the readability of text, sketches and x-rays press the TEXT-key (#16). This mode enhances the
contrast of the picture. Please note that in this mode the colors are darker than usual. To switch off the text
enhancement mode press the TEXT-key again. While the text mode is activated the TEXT key on the control
panel is illuminated red.