Datalogic Scanning I GD4100 - Manual (Page 175)

Code 39
Product Reference Guide 173
Code 39 — cont.
Code 39 Check Character Transmission
Enable this option to transmit the check character along with Code 39 barcode data.
ENTER/EXIT PROGRAMMING MODE
Code 39 Check Character Transmission = Don’t Send
Code 39 Check Character Transmission = Send
Code 39 Start/Stop Character Transmission
Enable this option to enable/disable transmission of Code 39 start and stop characters
ENTER/EXIT PROGRAMMING MODE
Code 39 Start/Stop Character Transmission = Don’t Transmit
Code 39 Start/Stop Character Transmission = Transmit
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DEFAULT
DEFAULT