Newland NLS-PT980 Series User Manual page 48

Reading
How to Read 2D Barcode
Optimum Reading Stance:
1、 Focus the green aiming bar on the central of a barcode.
2、 The distance of scan window & barcode between 5cm and 20cm
3、Yaw (αas below)between 0° and 45° （0 is the best）
4、Pitch(γas below) between 0° and 45°（5-20 is the best）
5、Roll (βas below)360°
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