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4.4 Calculations
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Resistance
∆R/R
Hysteresis Jump
Hysteresis Area
Bias Point
Sensitivity
Barkhausen Noise
Amplitude (Positive, Negative, P-P)
Amplitude Asymmetry
∆Temperature
4.5 Tests
4.5.1 Static Tests
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MR Element:
Head Select, Short / Open, Polarity
Write Element:
Short / Open
Flex
• Point to Point Tests
• Point to Ground Tests
• Passive Component Tests
• RDX/RDY tests
Preamp Chip:
Chip Modes functionality, Fault Line, Power Margins, Power Consumption
Voice Coil:
Open / Short Coil Resistance, Winding Polarity, Coil Inductance
4.5.2 Quasi-Static Tests
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Hard and Easy Transfer Curves
Popcorn
Bias Angle
Temperature and Resistance vs. Bias Current
Amplitude and Amplitude Asymmetry vs. Bias Current
Electromigration (with real time ∆R monitoring and immediate failure abort)
Stability of Amplitude and Amplitude Asymmetry (during Bias Current, Field, or Write Bursts)
Thermal Stability
ESD Stability
4.6 Computer
Type:
Operating system:
Pentium IIItm PC, 15” Flat Panel Monitor, 6GB Drive, and 128MB
Windows 98tm
4.7 Power Supply
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Kepco:
DC Output Range:
Closed Loop Gain:
Output Impedance:
BOP 20-5D
+/- 5A
. 5 GI (A/V)
Shunt R 40kΩ Shunt C3 .05µF
ISI QST-2001 User’s Manual Copyright 1996-1999 Integral Solutions Int’l, all rights reserved
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