Servo Frame Format - Fujitsu MPD3XXXAH Product Manual

2.80 s 0.45 s
Write/read
SMK1
Recovery
14.50 s
Servo
Frame
(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.
4 - 18
1.80 s
2.85 s 0.60 s
POS
SMK2
Gray Code
A
DATA
115.7 s
Figure 4.7

Servo frame format

C141-E072-01EN
1.80 s 1.80 s
1.80 s
POS POS
POS
B D
C
Servo
DATA
Frame
0.60 s
PAD
DATA