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2.2.1 .2
Apply power to the disk drive.
HUB
---+----~--+--+--.......,_
CENTER LINE
_.....,_TRACK01
Figure 2-4
Hub Center Line and Track Locations
NOTES
The Track 16 radius is 1.9167. Other track locations are computed
based upon 48 TPI.
2.2.1.3
Select the disk drive with the interface
logic.
2.2.1.4
Insert a Cats Eye alignment diskette (Dysan alignment diskette number 800180) into the disk drive.
2.2.1.5
Select Head 00, the lower head.
2.2.1.6
Read Track
16 for
Cats Eye alignment of the lower magnetic head.
2.2.1.7
Adjust the dual-channel, wideband oscilloscope to observe a Cats Eye pattern (see Figure 2-5).
2.2.1.8
Verify that the smaller of the two
(2)
Cats Eye patterns is not
less
than 75% in amplitude of the other
one.
2-4
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