Motorola Symbol DS9808 Product Reference Manual page 65

Trigger B (DS9808-LR/LL Only)
Parameter # F1h 78h
NOTE You cannot set Trigger B to RFID Reading or Set to Trigger A Value if Trigger A is set to RFID Reading.
Laser Preferred Decoding
(00h)
RFID Reading
(02h)
(Default for devices with RFID module)
Preferred
Laser Plus RFID
(04h)
Laser Only Decoding
(06h)
User Preferences & Miscellaneous Digital Scanner Options 4 - 23
Imager Decoding
(01h)
Imager Plus RFID
(03h)
*
Set to Trigger A Value
(05h)