RJS Inspector D4000 Laser (FIRMWARE version A.05 and Earlier) - Manual (Page 73)

Appendix K Operator ’ s Guide
002-5568 RJS, Minneapolis, MN 67
MOD = ECmin/SC
The greater the difference between minimum edge contrast and symbol contrast, the low-
er the grade.
Since “ink spread” will reduce the width and intensity of single module space within a
symbol, this is one thing to check in seeking to correct a low modulation grade.
Module
The narrowest expected bar or space width.
Moving Beam Scanner
A laser device that dynamically searches for a barcode pattern by sweeping a moving op-
tical beam through a field of view.
N (wide to narrow ratio)
In symbologies with two element widths, the wide to narrow ratio of elements is calcu-
lated by summing the average wide bar width and average wide space width and dividing
the sum by 2 times Z. Inter-character gaps, if applicable, are not included.
N = (avg.wide bar + avg. wide space) / (2*Z)
Nanometer (nm)
A unit of measure used to define the wavelength of light, equal to 10-9 meter.
Nominal
The intended value for a specific parameter. Tolerances are generally specified as posi-
tive and negative deviations from this value.