Table of Contents
Advertisement
Section 3: Operation
: The horizontal back porch may be too small or too large. If
IMAGE IS BREAKING UP
you can lock to the signal by changing H-Position but have a black left edge in the
image, reduce the source's horizontal back porch blanking. If the black edge is on the
right, increase the source's horizontal back porch blanking.
: You may need to adjust the Clamp Location
HORIZONTAL STREAKS IN THE IMAGE
option in the Input Levels menu (accessed via Image Settings menu) with 4- or 5-wire
signals.
: If some grays in your grayscale appears tinted when viewed in
COLORS ARE "OFF"
3D, your glasses may be slightly slow for the current signal setup. 1) If possible,
adjust the projector's Dark Interval control. 2) Double-check timing adjustments to
the source. 3) Use faster glasses.
3.10 Using Multiple
When an installation requires multiple projectors, you can use the RS232 serial ports
to daisy-chain the units together and control the group with a single keypad or a
Projectors
computer/controller connected to the first projector. In such a network, you can
choose to broadcast commands to the entire group, or use the
key as desired to
Proj
limit responses to an individual projector.
Alternatively, you may want to add projectors to a hub on an Ethernet network.
NOTE: Refer back to 3.6, Adjusting System Parameters and Advanced Controls for
complete information about communicating with multiple projectors.
'
Matching Colors
In a multiple-projector wall, you will likely want to precisely match color and intensity
In Multiple Screens
from image-to-image so that the full wall is as uniform as possible. This matching is
typically done in conjunction with Brightness Uniformity and Edge Blending.
Preliminary Calibration
As a final part of the manufacturing process, 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 (refer back to Figure 3.19). Upon installation
at a site, however, 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. Or you may be renting a projector in which the
colors were changed for use at its previous site, but are not ideal for yours.
The recommended first step in achieving such consistency is to use a color meter to
measure the native primary colors—red, green, blue, and white—as they appear at the
screen and 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 that can alter the final color characteristics
on-screen, and will improve color accuracy and consistency in a group of projectors. It
ensures a good starting point for further customizing and matching.
To return to the factory-set color primaries, such as when a projector is moved to
different site, you must access the Service menu (password-protected). Select the
User's Manual
3-57
.
Advertisement
Table of Contents
