- 32 - © 2020 unitech Electronics Co., Ltd. All rights reserved.unitech is a registered trademark of unitech Electronics Co., Ltd.MS852B Plus User’s Manual2.25.1 Scan ModeManual Trigger-Normal*Normal mode offers good scan speed and the longest working ranges(depth of field).Presentation ModePresentation Mode uses ambient light and scan engine illumination to detectbar codes. When in Presentation Mode, the LEDs remain dim until a barcode is presented to the scan engine, then the aimer turns on and the LEDsturn up to read the code. If the light level in the room is not high enough,Presentation Mode may not work properly. Scan the following bar code toprogram your scan engine for Presentation Mode.2.25.2 Aimer ModeThis feature allows you to turn the aimer on and off. When the Interlaced barcode is scanned, the aimer is interlaced with the illumination LEDs.Default = Interlaced.Aimer Mode*Off