Vivotek IP2121 - Manual (Page 73)

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‘Input is Rising’ and ‘Input is Falling’ rather than ‘Input is High’ and ‘Input is Low’ to let
the condition be triggered only when state is changed.
Q The image is not clear enough. Is anything broken?
A The lens can be fine adjusted by rotating the outer ring. Please rotate it clockwise or
counter-clockwise to focus near or far.