An example of Code 39, with m = 0 and m = 1, follows:

m = 0 (the human readable character is printed)

m = 1 (the human readable character is not printed)

s is the space width adjustment factor.

This parameter affects only space modules. It can be used to adjust the width of space modules.

The range for possible s values is: -3 <= s <= 3.

s value

248x space

249x space

module adjustment

module adjustment

 

 

 

-3, xFD

-3/240 inch

-3/360 inch

 

 

 

-2, xFE

-2/240 inch

-2/360 inch

 

 

 

-1, xFF

-1/240 inch

-1/360 inch

 

 

 

0, x00 (default)

0

0

 

 

 

1, x01

1/240 inch

1/360 inch

 

 

 

2, x02

2/240 inch

2/360 inch

 

 

 

3, x03

3/240 inch

3/360 inch

 

 

 

Notes:

The s value affects the actual width of the entire barcode. To minimize the width of space modules, set s = xFD. To maximize the width of space modules, set s = x03.

If an invalid s value is specified, it is ignored and the default value (s = 00) is used.

150 Section 8: Barcodes

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Lexmark 249X, 248X manual Is the space width adjustment factor, Value 248x space 249x space Module adjustment