Christie CP2000-SB User Manual page 69

Section 1: Introduction
For example, when processing typical dual (L/R) 3D signals of 24Hz, a Frame Rate N:M setting of 4:2 will
generate 4 frames of output for every 2 frames of input at a final frame rate of 96 Hz. For any source, keep the
final frame rate less than that of the projector (which is 67 Hz for full 2048 x 1080 resolution). Generally,
incoming 24Hz signals can be increased by a maximum factor of 5:2.
DARK TIME and OUTPUT DELAY NOTES:
The dark time between incoming L/R frames provides a brief interval of non-image time-in microseconds (μs)-
for your switching device (such as shutters in glasses) to complete its switch. Ideally, 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 break-up. 2048 x 1080 displays may be cropped.
Likewise, 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.
3-24
Figure 3-12 Examples of Frame Rate N:M
CP2000-SB User Manual
020-100162-06 Rev. 1 (03-2014)