FUJITSU MPG3XXXAH - Manual (Page 64)

C141-E112-01EN 4 - 17
Pos
C
PAD
Pos
D
Pos
B
Pos
A
1.81
µ
s
0.17
µ
s 0.16
µ
s
0.72
µ
s
R/W Recovery Field
0.56
µ
s 0.56
µ
s 0.56
µ
s 0.74
µ
s
0.80
µ
s
PA
SSM ASM
SCD
0.53
µ
s
Servo
Frame
DATA DATA
Servo
Frame
86.81
µ
s
6.63
µ
s
Figure 4.6 96 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 (ASM, SSM)
This area generates a timing for demodulating the gray code and position-demodulating Pos A to
D by detecting the servo mark.