NOTE:

The dome cannot

do electronic zoom in a

pattern. Optical zoom will

operate in a pattern.

PATTERNS
The Spectra II dome can do either one full pattern (1.5, 3, or 6 minutes long) or two half
patterns (.75, 1.5, or 3 minutes long). This pattern can consist of any standard pan and tilt
or lens command. Presets, flip, and turbo are not allowed in a pattern. Zone scan can be
enabled while running a pattern.
Refer to the documentation for your control system to program and run patterns.
ALARMS
The Spectra II dome has seven alarm inputs, which can be designated as either high or low
priority through its programming menu.
When an alarm is received, the dome does one of the following:
• Moves to the preset position that corresponds to the alarm number. For example, if
alarm 3 is activated, the dome moves to preset 3.
• Runs a half pattern or full pattern as programmed in the Alarm Pattern menu.
• If the activated alarm inputs have the same priority–all low or all high–then the dome
will sequence between the presets that correspond to the alarm numbers.
• If the activated alarm inputs have different priorities–for example, one is high and four
are low–the dome goes only to the high. It remains fixed on the high and only goes to
the low after the high has been cleared.
In certain situations, the dome will respond as follows:
• If a preset has not been set, but an alarm is connected, the dome will go to a factory
preset that will not be the desired position.
• If one alarm is a preset and another is a pattern and both are received, the dome will
alternate between them.
An alarm clears by returning to its former (off) state.
Depending on choices made on the programming menu, the dome can respond to an alarm
by running one of the patterns below. (Refer to

Patterns

in the
Programming
section for
more information.)
• Run full pattern
• Run half pattern 1
• Run half pattern 2
When sequencing between presets, the dwell time depends on the time set on the Alarm
Dwell menu for that preset. After the dwell time expires, the dome immediately does one of
the following:
• If the resume feature was selected on the programming menu and there are no other
alarms activated, the dome resumes its prior activity. So, it might return to its previous
position or resume a scan or pattern.
• If there are other alarms activated, the dome goes to them.
If you move the joystick to pan or tilt the dome, or if you issue a lens command while there
is an alarm, the pan and tilt or lens command overrides the alarm. Sixty seconds after the
last pan and tilt or lens command, the dome will return to the alarm preset if the alarm is
still active.
Pelco Manual C2423M (5/00) 6