Calibration - NEC KT-X46UN User Manual

0 | NEC Display Wall Calibrator - UsEr's GUiDE

Calibration

Problem: When switching to different video inputs the displays no longer match.
Solution: Each video input can have its own settings for various controls, such as Brightness, Gamma Se-
lection, Picture Mode etc.
During calibration the settings for the currently selected video input are automatically configured. However if
other video inputs are going to be used as well with the video wall, then the settings for those inputs will need
to be correctly configured to use the calibrated settings.
Use the Calibration tab on the Display Settings dialog to apply the calibration settings to other video inputs.
Problem: When showing the Calibrated Test Pattern the displays in the video wall match. However when an
analog video signal is shown they no longer match.
Solution: Differences in the analog video signal level between displays may cause the displays not to match.
The Auto-Setup operation should be performed on each display which will measure the incoming analog video
and automatically set the video level controls in the display.
This operation may need to be performed each time a new analog video signal is connected, or if a major
change was made to the video wiring to the display, or a video amplifier or splitter was added to the video
source.
Auto-Setup can be accessed from the OSD on each display or by using the Video tab in the Display Settings
dialog available from the Edit menu.
Note: This adjustment process requires specific patterns to be displayed on the video signal in order for the
display to automatically adjust the video signal levels correctly. Failure to display the correct signal may result
in the video levels being incorrectly set and the displays may not match in color when using an analog video
source.
Problem: "Error: No reply from the display" message is shown during the calibration when using a USB to
RS232 adapter.
Solution: Certain models of USB to RS232 adapters may not function correctly with NEC Display Wall
Calibrator and may cause an "Error: No reply from the display" message during the calibration process. The
display will be detected correctly, but the calibration will fail at a certain point.
This issue is caused by an incompatibility with the USB to RS232 adapter and drivers that causes long
messages sent to the display to not be transmitted correctly.
If you encounter this error, please check with the hardware vendor to see if newer device drivers are available.
If this does not solve the issue, try using a different model of USB to RS232 adapter.