Specifications

CHAPTER 6 USER PREFERENCES
Introduction
This chapter describes each user preference feature and provides the programming bar codes necessary for
selecting these features.
Host Selection
The default serial host is Standard RS-232 with SSI and the default USB host is HID Keyboard Emulation, as
these host types provide more flexibility during integration when configuring the unit via host command.
Selecting other host configurations requires scanning bar code menus and cannot be performed via host
programming. See each host chapter for configuration options for each host type.
Phantom Scan Session
The Phantom Scan Session feature places the system into a known state for two seconds immediately after
the power-up beep sequence in order to decode a parameter bar code without intervention and regardless of
existing settings and mode. This allows you to scan a Set Defaults or other parameter bar code without
triggering the imager or initiating a host scan session in order to return an unresponsive system to its factory
default settings. Aim and illumination are turned off and Phantom Scan exits upon a trigger event, host
command, or successful decode.
NOTE The DS457 automatically switches between USB and serial host interfaces based on the type of cable
attached.
NOTE Selecting one of the Serial Host Types on page 9-5 disables SSI support. To restore Standard RS-232 with
SSI support, scan SSI Host on page 8-9.