90 HH492 User Guide
If you are reading Code 39 barcodes, Codablock A should remain disabled. If you 
are enabling Codablock A, you should disable Code 39 (see Code 39 on page 61).
Codablock A Message Length
Scan the barcodes below to change the message length. Refer to Message Length 
Description (page 58) for additional information. Minimum and Maximum 
lengths = 1-600. Minimum Default = 1, Maximum Default = 600.
Codablock F
<Default All Codablock F Settings>
Codablock F On/Off
If you are reading Code 128 barcodes, Codablock F should remain disabled. If you 
are enabling Codablock F, you should disable Code 128 (see Code 128 on page 73).