MagTek InSpec 9000 - Manual (Page 72)

InSpec 9000 Encoded Card Tester
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Density
The number of bits encoded per unit length usually expressed in bits per inch, Bpi or bits
per millimeter, Bpmm.
End sentinel
The character which signals the end of the data field on an encoded track.
Flux transition
A reversal of magnetic field direction (polarity) on a magnetic stripe track. The flux
transition on the stripe is caused by reversal of current flow in the encoding head during
the process of encoding.
Flux transition spacing variation
See
"Jitter"
Ftpmm
Flux transitions per millimeter - a measure of the density of recording on a magnetic
stripe track.
Ftpi
Flux transitions per inch - a measure of the density of recording on a magnetic stripe
track.
High-Co or HiCo
Colloquial term for high coercivity magnetic recording material. Typically, the value of
high coercivity media is considered to be between 2500 to 5000 oersted (typically 2500
to 4000 for ISO 7811-6 compliance).
International Standards Organization (ISO)
The international organization made up of national standards bodies and under whose
auspices international standards are developed and published.
Jitter
Term used to describe a variation in the perfect placement of flux transitions. There are
two general categories of " jitter" where the value of flux transition variation is stated as a
percent of the idealized position and where the value of flux transition variation is stated
as a percent of the previous flux transition. These two parameters have several names
associated with them. The first category is referred to as:
Flux Transition Spacing Variation
Long Term Jitter - LTJ
Bin - (Zeroes bit jitter)
Sin - (Ones bit jitter)