Motorola MS4404 用户手册

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Symbol MS4404/MS4407 Integration Guide

Level - A trigger event activates decode processing, which continues until the trigger event ends, a valid 
decode, or the decode session time-out is reached.

Presentation Mode - When the Symbol MS440X detects an object in its field of view it triggers and attempt 
to decode. The range of object detection does not vary under normal lighting conditions. This applies to 
decode mode only. In this mode the unit does not enter its sleep state.

Host - A host command issues the triggering signal. The Symbol MS440X interprets a trigger pull as a level 
triggering option.