Printronix Online Data Validator - Manual (Page 68)

Chapter 2 Configuring the Validator
68
The bar code was scanned five times: four scans had values of
0.51 (grade B) and one scan had a value of 0.40 (grade C).
The Decodeability grading calculation is:
(4 x 0.51) + (1 x 0.40) = 2.44
2.44 ÷ 5 = .49 (grade C)
The Overall Grade calculation is:
(4 x 3.0) + (1 x 2.0) = 14
14 ÷ 5 = 2.8 (grade B)
Modulation
NOTE: This parameter factors into the Overall Grade (page 66).
Modulation measures how well the scan laser sees the wide
elements (bars or spaces) relative to the narrow elements. In
general, scanning lasers see bars better than spaces and wide
elements better than the narrow elements. This menu item sets the
value used by the validator for pass/fail threshold during the
analysis of bar codes. Higher values create a stricter criterion for
passing.
You can set the Modulation parameter to a percentage value from
0% to 100%. The default is 0%.
1. Press to take the printer offline and place the printer in
Menu mode.
2. If necessary, press ↓ and ↵
at the same time to unlock the
↵
key.
3. Press until VALIDATOR displays.
4. Press
↑ until Modulation displays.
5. Press + or – to scroll through the percentage values: 0% to
100%. The default is 0%.
6. Press
↵
to select the desired value.
7. Press
↓ and ↵
at the same time to lock the
↵
key, then press
PAUSE to take the printer offline.
8. Press PAUSE again to put the printer online.
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