Christie Mirage S+/HD/WU User Manual page 80

Section 3: Operation
Size
Size controls both the image width and height in tandem, maintaining the current aspect ratio (proportion) of
the displayed signal data.
Vertical Stretch
Vertical stretch adjusts the height of the image while keeping the width constant. Use Vertical Stretch to change
the aspect ratio of the display.
Pixel Track
Steady flickering or several soft vertical stripes or bands across the entire image indicates poor pixel tracking.
Proper pixel tracking helps ensure that the image quality is consistent across the screen, that aspect ratio is
maintained, and that pixel phase can be optimized (described below). Tracking determines the frequency of the
pixel-sampling clock, indicated by the number of incoming pixels per line, so that all pixels generated by a
particular source are sampled.
NOTE: By default, the projector samples at the correct frequency for most sources.
For best results, use a good test pattern such as a smooth gray consisting of a clear pattern of black and white
pixels, or a similar "half ON, half OFF" graphic image, such as the Windows 2000 shutdown screen. Adjust
the slidebar until the vertical stripes broaden to the point where 1 large stripe fills the image. If the image still
exhibits some shimmer or noise, adjust the Pixel Phase (described below).
Pixel Phase
NOTE: Adjust Pixel Phase after Pixel Tracking.
Adjust pixel phase when the image (usually from an RGB source) still shows shimmer or "noise" after pixel
tracking is optimized. Pixel phase adjusts the phase of the pixel-sampling clock relative to the incoming signal.
For best results, use a good test pattern such as a smooth gray consisting of a clear pattern of black and white
pixels, or a similar "half on, half off" graphic image, such as the Windows shutdown screen. Adjust the slidebar
until the image stabilizes and each pixel is clearly defined. You may notice that you can stabilize the image at
more than 1 point. For example, you may find that the image appearance at "11" is identical to the image
appearance at "38", thus you can use either setting.
If some shimmer from a video or HDTV source persists, use the "Filter" control to remove high-frequency
noise from the signal.
H-Position
H-Position
Select the
within the area of available pixels.
3-28
option from the Size and Position menu. This option moves the image right or left
Roadster, Matrix WU, Mirage S+/HD/WU User Manual
020-100002-06 Rev. 1 (04-2011)