MagTek InSpec 9000-2005 - Manual (Page 66)

InSpec 9000-2005 Encoded Card Tester
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Note that a positive value indicates that the flux transitions were farther apart than the ideal bit
density value. A negative value indicates that the flux transitions were closer together that the
ideal bit density value.
The mathematical formula for this parameter is shown below along with the quantities for this
specific example:
Clocking or Zero Bit Distance
flux transition
between Flux Transitions
- 1 x 100 = %
spacing variation
1/Bit Density (Bin)
For this example:
0.004350”
- 1 x 100 = -8.7%
flux transition
0.004762” spacing variation
(Bin)
Graphically, the definitions for Bin, Bin + 1, Sin, and Sin +1 are shown in Figure A-10.
Figure A-10. Bit Cells for 0 and 1 Bits