Barco MCM-400 HFR, User Manual

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11. Maintenance
11.7 Internal and scaled patterns
Introduction
The MCM-400 HFR can be used to generate a list of patterns. The Scaled patterns are generated right after the input boards of
the MCM-400 HFR, whereas the Internal patterns are generated at the end of the image processing board, just before the signal
is transferred to the output board.
Output
Image
processing
Input la
y
er
Input la
y
er
Scaled patterns Internal patterns
Image 11-9
The patterns can be used for alignment or adjustment or they can be used for troubleshooting.
Scaled patterns
Scaled patterns are generated just behind the input boards and have the same timings of the selected source signal, which means
that
they can only be displayed if a source sync signal is available .
If a source image shows some artefacts, but the scaled patterns look fi ne, the cause for the artefacts must be looked for in the input
board, the wires or the image generator.
If a source image shows some artefacts and the scaled pattern shows the same artefacts, the cause should be looked for in the
image processing board.
The scaled patterns are distorted according to the geometry distortion de fi ned in the active Geometry fi le.
Internal patterns
Internal patterns are generated just before the output board and are seen full screen. If the desktop image shows artefacts, but the
internal patterns look
fi ne, then the issue will be found before the output board.
The internal patterns are not in fl uenced by the geometry distortion of the active Geometry fi le.
Displaying a Scaled pattern
1. In the OSD, navigate to Installation > Scaled patterns .
Image 11-10
2. Open the drop-down menu and select the pattern of your choice.
168 R5909056 MCM-400 HFR 11/05/2016