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9.6
Azimuth Verification
(1)
Insert an alignment
d
iskette.
Seek
to
the
track
specified
in
the
azimuth
column
of
Table
B.l
.
(2)
Set
the
oscilloscope
in the
same
conditions as in
B.3, and
set
ho
rizontal deflection
to
0
,5
ms/division.
(3)
Measu
re
as
shown
below.
(4)
Confirm that
the
measured
value
meets the
specifications
in
the
azimuth
column
of
Table B.l
,
B
c
B
C
c
o
A
B
A
0
A
:!
A
)!,
m
u (h
0 wave
fo rm$
CaseofB
>
C
C_ofB
<
C
o
B
-
C
Azimuth
·
B
_
D
>(
(AI
C
-
B
Azimurh
,. - - -
x
(AI
C
-
A
9.7
Index
Bu
rst Verification
3 .5·inch
IAI
:
CE
-
30'
DAD
-
15'
Fig.
9.4
Azimuth
Waveform,
S.2S·inch 1M
:
12'
(1)
Insert an alignment
d
iskette.
Seek to
the
track
spec
ified
in the
li
B
column of
Table B.l
.
(2)
Set
the
oscilloscope
time base
as
follows:
S.2S
·i
nch: 50
ps/
division
3.5-inch
:
1
ms/d ivision
(3)
Check
that
the time fr
om oscilloscope
start
to the
first
data pul
se meets the
1
/
8
specifications
of
Table
8.1
.
(DAD
system)
(4)
It
the
specificat
ions are
not
met,
adjust
as
follows.
(No
adjustment
necessary for
3.5·inch
models)
•
Loosen the index
detector
mounti
ng
screws enough
to free the
assembly.
•
Adjust the
timing
to
200
±
200
p
sec.
•
Retighten
the
screw.
•
Check the timing again
.
I"
Indell. Burst
..
/
v
Fig.
9.5
Index Timing
- 10 -
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