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2.5
MONITOR BLANKING
Monitor blanking is used to remove unnecessary video pictures (and text) from alarm
monitors. Usually, alarm monitors remain blank until an alarm condition occurs.
Camera selections are then displayed to view the active alarm zone. Once the alarm has
been cleared, the alarm monitor can again be blanked. This would automatically be
managed by the video system.
2.6
DYNAMIC TEXT POSITIONING
The displayed text position on the monitor may be changed for each camera selected
preventing important areas in the picture from being obscured by the text. To enable
dynamic text positioning for a monitor, the (X) and (Y) position fields for that monitor's
post-text insertion module must be set to zero (0). The video system will then use the
pre-text (X) and (Y) positions defined for each camera.
2.7
BLACK-PAUSE VIDEO SWITCHING
When a monitor switches from one camera to another, frame roll occurs if the camera
signals are not synchronized. This occurs because the monitor takes time to
resynchronize to the new video signal.
The MAXPRO-Net video system holds the monitor black while frame roll occurs creating
the illusion that the frame roll is non-existent. With black-pause, we have monitors that
are pleasant and less stressful to observe while switching between cameras.
2.8
SOURCE GROUPING
In a large video system, it is sometimes desirable to divide the available cameras into
different groups (Source Groups) so that certain groups of cameras, can only be
selected for display on particular video output channels or by particular operators.
Such a case would arise when a video system has a dedicated keyboard controlling
different areas of a building (ground floor, car park, etc.) or if the single MAXPRO-Net
system may be doing the job of several video switching applications.
Rev. B
Note: Every camera that can be displayed on the
monitor (using Dynamic Text Positioning) must have its
(X) and (Y) positions completed even when pre-text
insertion is not being used. Other monitors can still be
defined to a Fixed Text Position, even when displaying
the same cameras.
2-3
HMXMC001013
31-Mar-06
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