MagTek InSpec 9000-2005 - Manual (Page 67)

Appendix A. Magnetic Encoding
57
Subinterval Spacing Variation -Sin
Subinterval Spacing Variation is the distance measurement between a subinterval transition over
one half the bit density for the track.
The mathematical formula for Sin is as follows:
Distance
between a Flux Subinterval
Transition and Subinterval
- 1 x 100 = %
spacing variation
1/(Bit Density x 2)
Adjacent Bit Cell Spacing Variation - Bin + 1
Adjacent Bit Cell Spacing Variation* is the distance measurement between Zero Bit flux
Transitions over the previous bit cell for the track.
Clocking
or Zero Bit Distance Adjacent Bit
between Flux Transitions
-1 x 100 = %
Cell
Previous Clocking or Zero Bit variation
Distance between Flux Transitions (Bin + 1)
*Adjacent bit cell spacing variation is also called Bit-to-Bit Jitter or BBJ
Adjacent Subinterval Spacing Variation - Sin + 1
Adjacent Subinterval Spacing Variation is the distance measurement between a subinterval
transitions over the previous subinterval.
Distance between a Flux Adjacent
Transition and Subinterval
-1 x 100 = %
Subinterval
One Half of Previous Bit variation
(Sin + 1)