Rice Lake Datalogic QuickScan QD2100 Linear Imager Hand-held Scanner - Manual (Page 65)

ACK NAK Options
Product Reference Guide 57
ACK NAK Timeout Value — cont.
ENTER/EXIT PROGRAMMING MODE
Select ACK NAK Timeout Value Setting
Make a mistake? Scan the CANCEL barcode to abort and not
save the entry string. You can then start again at the beginning.
CANCEL
DEFAULT 01 ACK NAK Timeout value is 200ms