Hikvision DeepinView IDS-2CD7A46G0/P-IZHSY 4MP Outdoor Network Bullet Camera with Night Vision & 8-32mm Lens - Manual (Page 8)

Installation & Configuration Guidance of DeepinView LPR Camera
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(2) Go to Image>Display Settings to change Exposure Time and Gain according
to the standard below (the Gain control can be operated only after step 1 is
finished ):
Speed < 30km/h — Exposure Time : 1/150 - 1/200 ;
30km/h < Speed < 60km/h — Exposure Time : 1/250 - 1/500 ;
60km/h < Speed — Exposure Time : 1/500 - 1/1000
Gain : Generally set as 20 and we usually don’t change this.
(3) Make sure the Focus Mode is semi-auto.