Brickcom OSD-200 20xp - Manual (Page 74)

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Specify the index number of the programmed Privacy Mask in the
corresponding field.
 Hsize and Vsize
The size of a Privacy Mask can be customized by specifying its
horizontal and vertical size. The value of <Horizontal Size>
ranges from 1 to 80, while that of <Vertical Size> ranges from 1 to
60.
After finishing the setup of a Privacy Mask, click on the button
<Add> to save the programmed Privacy Mask.
B. Mask Clearing
In this section, users can delete an existing Privacy Mask. Please
select the Privacy Mask to be removed from the drop-down list, and
click on the button <Clear>. Then the selected Privacy Mask will be
removed.
C. PT Steps (1~30)
Users can setup the location of every privacy mask with the control
panel on the Privacy Mask page. Set a number from 1 to 30 as the PT
Step when users adjust the privacy mask via the control panel. Each
step indicates 0.225°.