Using Multiple Projectors - Christie M Series User Manual

Section 3: Operation

3.11 Using Multiple Projectors

IMPORTANT! When working with more than two projectors, work left to right, top to bottom.
When an installation requires multiple projectors, use the RS-232 serial ports to daisy chain the units together
and control the group with a single keypad or a computer/controller connected to the first projector. In such a
network, you can choose to broadcast commands to the entire group, or use the P
responses to an individual projector.
Alternatively, you may want to add projectors to a hub on an Ethernet network. See
Communications
3.11.1Match Colors in Multiple Screens
In a multiple-projector wall, you will likely want to precisely match color and intensity from image-to-image
so that the full wall is as uniform as possible.
3.11.2Preliminary Calibration
All primary colors in the projector are precisely set to pre-established values to ensure that overall color
performance is optimized and is as accurate as possible. Lighting and other environmental factors may slightly
change how these colors appear on your screen. While the change is negligible in most cases, you may prefer
to recover the originally intended color performance before trying to match colors from several projectors.
To achieve consistency use a color meter to measure the native primary colors—red, green, blue, and white—
as they appear at the screen. Record these as Color Primary Settings in the Service menu (password-protected)
for each projector. On the basis of these new values, which are stored in memory, each projector will then
automatically calculate any necessary corrections to reproduce the original factory colors under the current
environmental conditions. This essentially calibrates a projector to its surroundings, compensating for factors
such as screen type; lamp and/or ambient lighting and will improve color accuracy and consistency in a group
of projectors. It ensures a good starting point for further customizing and matching; however, is not critical for
all installations.
To access the Service menu (password-protected) return to the factory-set color primaries. Select the Reset to
Factory Defaults option in the Color Primaries submenu. Then repeat the calibration process describe above
and continue with matching of colors.
3.11.3Color Adjustment Procedure
Once the Color Primary Settings are calibrated for the site (see above), use the Color Adjustments by X,Y or
Color Saturation menu to further refine each projector's fundamental colors so that the hue and intensity of
each color appears the same from one display to another. Once matched, you will have created a single new
shared range of colors or "color gamut" that all of your projectors can produce. This palette—named User 1, 2,
3 or 4—can be applied or disabled for a source at any time throughout a bank of adjacent displays, simplifying
both the setup and maintenance of a "seamless" wall.
1. Set up and optimize all projector settings. You can ignore color temperature, since you will be redefining
color performance in this procedure, but do optimize each projector in every other aspect. Closely align all
screen edges.
2. Assign projector numbers to make communications easier. Use desired keypad.
3-56
for full routing details.
ROJ
key as desired to limit
2.9.5 Ethernet
M Series User Manual
020-100009-08 Rev. 1 (05-2013)