Denso BHT-300B User Manual page 72

MINIMUM DIGITS (Minimum number of digits to be read for ITF, STF, or Codabar)
You can determine the minimum number of digits to be read for ITF, STF, and Codabar. Setting a small
number of digits increases the frequency of digit-missing reading or misreading depending upon how to
scan bar codes or the quality of bar codes. On the other hand, setting a large number will diminish the
possibility of those errors.
The entry range is from 2 to 20 for ITF, from 1 to 20 for STF, and from 3 to 20 for Codabar. The default
is 4 for ITF and Codabar, and 3 for STF.
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