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A random scan pans randomly between the left and right scan limits. For example, the scan may start
at point in the scan, then pan right 40° and pause, pan right 10° and pause, pan left 20° and pause, and
pan right until it reaches the right scan limit. Figure 4–8 illustrates a random scan. In this figure, the
dashed line represents the scan area, and the solid line represents the scan pattern. The circle on the
scan represents the start point. Each arrowhead represents a pause. “X” represents a change in
direction.
Figure 4–8: Random Scan
2. First pause.
4. Third pause.
Change direction.
1. Random scan starts
Left Scan
Limit
Parking
Lot
Building
3. Second pause.
Change direction.
Dome
Right Scan
Limit
5. Ri
g
ht scan limit reached.
Change direction.
Programming Scan Limits
Note: Scan Limits can only be used with controllers that support the Quick Set menu.
The Quick Set menu is not available for domes used with the Manchester protocol.
1. Select Alarms/Areas/Home/Presets/PZ from the Dome Configuration Menu.
2. Select Scan Limits.
The Scan Limits screen appears:
SCAN LIMITS
PAN to LEFT limit
ZOOM to mark BOUNDARY
Cancel RIGHT limit to Delete
CANCEL
Configuring Alarms, Areas, Home, Privacy Settings, Presets and Scan Limits 4–19