HP Linear Barcode Scanner II Programming Reference Manual page 61

Reading Parameters
Double Read Timeout (continued)
$CSNDR3C
Double Read Timeout = 0.6 Second
$CSNDR50
Double Read Timeout = 0.8 Second
$CSNDR64
Double Read Timeout = 1 Second
Programming Reference Guide
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Enter/Exit Programming Mode
DEFAULT
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$CSNDR46
Double Read Timeout = 0.7 Second
$CSNDR5A 
Double Read Timeout = 0.9 Second
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