User manual

85XX Series Network DVR User Manual……………………………………………………………………….V1.0
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4.4.2.12 Vertical Field of View
The vertical field of view is required when calibrating a camera. If you know the vertical field of view of the
camera it can be entered directly. If however, you don't know the vertical field of view, it can be determined
from the following table, given the vertical image dimension and its focal length:
If you are unable to determine the vertical field of view for your camera from the above table, leave the field of
view at its default setting, 40.
4.4.2.13 Measurement Units
The height, area and speed annotation can be displayed in metric or imperial units. By default the system
displays metric units. To change the measurement units, select the Advanced settings page and change the
Measurement Units option. Apply the changes.