Christie CP2000-ZX User Manual page 66

Section 3: Operation
3D SYNC INPUT MODE NOTES
Select the option matching your source type and how the 3D sync is supplied:
• A = Left, B = Right: Select if your 3D source provides separate left and right data via 2 cables at the 292 A
and 292 B SMPTE ports. This assumes the 3D stereo sync signal is included with the image data inputs
rather than supplied separately at the GPIO port.
• White Line or Blue Line: Select only if using a single 3D input signal in which an embedded white or blue
line at the bottom of each frame identifies left vs. right, and an additional separate 3D stereo sync input at the
GPIO port is not present. Short line = Left, Long line = Right.
• Assigned GPI: Select only if using a single 3D signal requiring a separate 3D stereo sync input at the GPIO.
FRAME RATE N:M NOTES
These N:M ratios define how many frames to display per number of frames that
form one complete image. For all 3D use, the denominator is 2, indicating that two
frames (left and right) are combined into every complete display frame. For non-3D,
it is 1 frame. Set to the highest rate possible without image cropping.
DARK TIME and OUTPUT DELAY NOTES
The dark time between incoming L/R frames provides a brief interval of non-image time (in microseconds) for
your switching device (such as shutters in glasses) to complete its switch. When this interval is properly set and
exactly suits the speed of your device, neither eye sees image data intended for the other eye. This helps to
prevent color artifacts and ghosting while ensuring that each eye sees all intended data.
NOTE: Because the dark time interval essentially increases frame rate, increasing this setting beyond its
range for the current frame rate factor will cause image breakup. 2048 x 1080 displays may be cropped. A
setting less than the minimum is not supported and will simply revert to the minimum interval.
The output delay setting shifts the 3D sync in relation to the Dark Time interval, starting each frame slightly
earlier (-) or later (+). Adjust only as necessary—too much offset can cause "bleed-through" where each eye
sees some data that is intended for the other, or causes color cropping since some DMD sequences may be
clipped.
3-28
Figure 3-21 Examples of Frame Rate N:M
CP2000-ZX User Manual
020-100006-05 Rev. 1 (05-2009)