Rjs Inspector D4000 SP (FIRMWARE version A.06 and Late Manuel d'utilisateur télécharger pdf (Page 69)

Operator’s Guide Appendix K

002-5572 RJS, Minneapolis, MN

The greatest reflectance value in a scan reflec-

tance profile including quiet zone. (Note: eRmx is

the greatest reflectance value of an element, not

including quiet zone).

Minimum Edge Contrast (Ecmn)

The smallest edge contrast in a scan reflectance

profile.

Minimum Reflectance (Rmn)

The smallest reflectance value in a scan reflec-

tance profile.

Misread

A condition that occurs when the data output of a

reader does not agree with the encoded data.

Modulation (MOD)

This parameter grade can be “A,” “B,” “C,” “D” or

“F.”

The modulation grade is based on the relationship

between minimum edge contrast (Ecmin) and sym-

bol contrast (SC).

MOD = ECmin/SC

The greater the difference between minimum edge

contrast and symbol contrast, the lower the grade.

Scanners and verifiers perceive the narrower bars

and spaces to have less intensity than wider bars

and spaces; the comparison of this diminished in-

tensity of narrow elements to wide elements is

called modulation. This condition is affected by

aperture size.

Note: Since “ink spread” will reduce the width and inten-

sity of single module space within a symbol, this is one

thing to check in seeking to correct a low modulation

grade

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Rjs Inspector D4000 SP (FIRMWARE version A.06 and Late Manuel d'utilisateur Page 69