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o
o
somewhere between 20
C to 50
C above
normal temperature inside the disk drive.
When the MR sensor travels at high
velocity with respect to the media and hits
a high spot on the media such as
mechanical scratch, debris or corrosion
spots. Its temperature will rise almost
instantaneously upon contact and decline
gradually to its normal operating
temperature. Such an occurrence is
referred to as thermal asperity. This
thermal noise spikes distorts the readback
signal of the read head.
U
User defined Data pattern A pattern
where the user can specify his own
data pattern.
W
Write Current Current that is
supplied to the head to write the data is
called "write current". Typical value of
write current is 40 [mA] for modern
MR and GMR head.
Waveform Analysis A type of
measurement which uses an
oscilloscope.This includes parametric
measurements such as TAA, PW and
Baseline. It also supports the NLTS by
Time Correlation method and NLTS by
Dipulse Extraction method.
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