- 125 - © 2018 unitech Electronics Co., Ltd. All rights reserved.unitech is a registered trademark of unitech Electronics Co., Ltd.MS652 User’s Manual4.9 Trigger ModeScan one of the following bar codes to select a trigger mode for the engine:• Standard (Level) - A trigger press activates decode processing. Decodeprocessing continues until the bar code decodes, yourelease the trigger.• Presentation (Blink) - The engine activates decode processing when itdetects a bar code in its field of view. After a period ofnon-use, the LEDs turn off until the engine sensesmotion.• Auto Aim - The engine projects the aiming pattern when it senses motion. Atrigger press activates decode processing. After two seconds ofinactivity the aiming pattern shuts off.• Auto Aim with Illumination - The engine turns on the aiming pattern andinternal illumination LEDs when it sensesmotion. A trigger press activates decodeprocessing. After two seconds of inactivity theaiming pattern and internal illumination LEDsautomatically shut off.• Host and Hardware Trigger Mode - A host command or trigger press issuesthe triggering signal, which isinterpreted as a level trigger option.