Users Manual Part 1

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LEVEL adjustment: In the real-time interface of infrared mode, click [ ] to
enter the manual dimming mode, the dimming parameters are unlocked,
and the "LEVEL" can be adjusted by the “Up” key or the “Down” key in the
five-directional key. The “Up” key is to increase Tmax and Tmin values at
the same time, and the “Down” key is to decrease Tmax and Tmin values
at the same time. During the adjustment process, the image dimming
changes synchronously.
SPAN adjustment: “SPAN” can be adjusted by “Left” key in five-directional
key. The TMAX value decreases while Tmin increases. During adjustment,
image dimming changes synchronously. SPAN can be adjusted by “Left”
key in five-directional key. The TMAX value increases while Tmin value
decreases.
In the real-time interface of infrared mode, click “A/M” to enter the semi-
automatic dimming mode, and the ƸT value box will pop up at the top of
the interface. Adjust the value between TMAX and TMIN by using the “Up”
key or “Down” key in the five-directional key, where ƸT=1/2 (TMAX-TMIN).