PIR function helps enhancing the accuracy and validity of motion
detect. It can filter the meaningless alarms that are activated by the
objects such as falling leaves, flies. The detection range by PIR is
smaller than the field angle.
PIR function is enabled by default if it is supported by the cameras.
Enabling PIR function will get the motion detect to be enabled
automatically to generate motion detection alarms; if the PIR
function is not enabled, the motion detect just has the general
effect.
Only when the channel type is CVI, the PIR function can be
enabled.
If the camera does not support PIR function, it will be unusable.
If the Device does not support PIR function, it will not be displayed
on the interface.