Dahua IR High Speed Dome Camera User Manual page 12

13. Idle Time Function
Users can set the function that is to be carried out in idle time as the Idle
Time Function. If the user exit the OSD menu after finishing with other
operations, and if the IR High-speed Dome Camera is in still state without
running, then after a period of time during which nobody operates the unit,
the unit will automatically begin to carry out Idle Time Function that is
configured in advance. The functions that can be set as Idle Time Function
include invoking preset position, running left&right scan, running tour etc. The
length of the period of time after which the Idle Time Function is to be carried
out can be set, the range is 1~240minutes.
14. Memory recalling function once power off
The unit has memory recalling function when power is off. If the unit is
running preset position, left & right scan, 360° scan, auto tour etc functions
when the power is off, then once the power is on, the unit will automatically
resume the ever-running functions after finishing self-checking
15. Camera module Lens Control
Users can adjust the Focal-length through controlling the keyboard to get
panoramic view or close view that they desire.
Focal Length Control
Users can adjust the Focal-length through controlling the keyboard to get
panoramic view or close view that they desire.
Focus Control
The system takes automatic focus as the default. While moving, the
camera module can automatically focus on the center of the object view to
get clear image. Under special circumstances, the user can manually adjust
the focus to achieve desired image effect.
● Manual focus can be realized through controlling the keyboard or matrix.
For details, please refer to the operation manual of the controlling keyboard
or matrix.
● In the state of manual focus, the user can control focal–length to make the
lens focus on objects. If the IR High-speed Dome Camera is configured to
resume auto-focus upon joystick operation, when there is operating on the
joystick, the IR High-speed Dome Camera will automatically focus. If a period
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