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Absolute Polarity (Parametric)
Overview
This section describes the Absolute Polarity measurement. Absolute polarity is measured
by the parametric module. This test is used to detect the pinned layer reversal of the GMR
head by measuring the TAA asymmetry of the Isolated Pulse TAA and Tribit TAA.
Measurement
1. To open the Absolute Polarity menu, click on the [Absolute Polarity] button from the
Procedure
Parametric frame of the Measure menu.
Figure 3-47
Absolute Polarity Menu
2. Set the parameters, click on each button to enter a new value.
Channel Bit Rate
Write Current
Sense Current
Average
Track #
Isolated Pulse
Pattern Mode
Chapter 3
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VEE Measurement Program Operation
Specifies the speed at which data bits are
written on the media per second [bps].
Specifies the current applied to the write head.
Specifies the current applied to the read head.
Specifies the number of revolutions to get the
average results.
Specifies the track number to be tested.
Specifies the repetitive period of the isolated
pulse pattern.
Specifies the configuration of the data pattern.
Select either 'Auto Mode' or 'User Mode'.
When 'Auto Mode' is selected, the
combination of isolated pulse and tribit data
pattern will be used automatically. When
'User Mode' is selected, the [Absolute
Polarity Pattern] button becomes active. This
Measurement
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