FUJITSU C141-E090-02EN - Manual (Page 62)

C141-E090-01EN 4 - 17
POS
C
PAD
POS
D
POS
B
POS
A
1.16
µ
s
0.18
µ
s 0.24
µ
s
1.64
µ
s
W/R Recovery Field
0.84
µ
s 0.84
µ
s 0.84
µ
s 0.92
µ
s
0.48
µ
s
PA
SSM ASM
SCD
0.84
µ
s
Servo
Frame
DATA DATA
Servo
Frame
115.7
µ
s
7.98
µ
s
Figure 4.6 72 servo frames in each track
(1) Write/read recovery
This area is used to absorb the write/read transient and to stabilize the AGC.
(2) Servo mark (SMK1, SMK2)
This area generates a timing for demodulating the gray code and position-demodulating Pos A
to D by detecting the servo mark.