Xerox 6100BD - Phaser Color Laser Printer Fundamentals page 104

Quality control
6-18
The following table identifies the signal level tolerances for all of
the MICR characters. These standards are required by ANSI
standards; tolerances for other standards might vary.
Character
0
1
2
3
4
5
6
7
8
9
dash
transit
amount
On-Us
Example: A dash symbol has a nominal signal level of 67. If a
signal level reading of 65 is taken of this symbol, the result would
be 97% ((65 ± 67) x 100 = 97%), which is an acceptable
specification range.
Distortions of the waveforms can be caused by a MICR character
that is noticeably skewed, by extraneous ink spots, or by a void
that exceeds specifications.
The following figure shows a graphic display of the magnetic
footprint for each MICR character. The number above a
waveform peak is the nominal signal strength value. The
waveforms shown here are for ideal characters.
Table 6-1. Signal level tolerances
Peak Minimum
number (50%)
1 78
2 51
1 63
1 51
3 63
1 63
5 63
1 45
4 63
1 99
3 and 5 40
3 63
1 and 5 42
3 and 5 60
Generic MICR Fundamentals Guide
Nominal Maximum
(100%) (200%)
130 260
85 170
105 210
85 170
105 210
105 210
105 210
75 150
105 210
165 330
67 134
105 210
70 140
100 200