Vertical Stretch - Mirage 2000 User Manual

OPERATION
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Mirage 22000/4000/6000User's Manual
Size
Size controls both the image width and height in tandem, maintaining the original
aspect ratio (proportion) of data from the incoming signal.

Vertical Stretch

Vertical stretch adjusts the height the image while keeping the width constant. Use
Vertical Stretch to display data from the incoming signal in a different aspect ratio.
Pixel Track
(
SHORT CUT:
Press Pixel
Pixel tracking adjusts the frequency of the pixel sampling clock, indicated by the number
of pixels per line, so that all pixels generated by a particular source are sampled. Proper
pixel tracking ensures that the image quality–whether good or poor– is consistent across
the screen, that aspect ratio is correct, and that pixel phase can be optimized (below).
NOTE: By default, the projector will sample at the correct frequency for most sources.
Make sure that pixel tracking is set to 1424 or higher for 3D images.
Pixel tracking is adjusted most effectively using a good test pattern, such as a smooth
gray consisting of a clear pattern of tiny black and white dots, or a similar "half on,
half off" graphic image, such as the Windows shutdown screen. Steady flickering or
several soft vertical stripes or bands across the entire image indicates poor pixel
tracking. Adjust the slidebar until the stripes broaden to the point where one large
stripe fills the image. Again, the image may still exhibit some noise. See Pixel Phase.
Pixel Phase
(
SHORT CUT:
Press Pixel
Pixel phase adjusts the phase of the pixel sampling clock relative to the incoming
signal. It is used primarily for adjusting RGB inputs.
NOTE: Adjust pixel phase after pixel tracking is properly set.
Adjust pixel phase when the image (usually from an RGB source) shows shimmer or
"noise". Pixel phase adjustment is done most effectively from within a proper test
pattern, such as a smooth gray consisting of a clear pattern of tiny black and white
dots, or a similar graphic image, such as the Windows shutdown screen. Adjust until
the image is stable and each dot is clearly defined. Using the numbers on the slidebar
as a guide, you will notice that you can actually stabilize the image at more than one
point—i.e., you may find that the image appearance at "11" is identical to the image
appearance at "38", thus you can select either setting.
Filter
Filter applies a low pass filter to the input signal. This removes high frequencies
which can improve pixel phase noise but which also reduces signal bandwidth. Note
that most signals will not require any filter adjustment—use the filter option only if
standard pixel tracking and phase adjustments do not adequately clear up a "noisy"
signal. For best results:
and adjust the top slidebar.)
and adjust the bottom slidebar.)