2.80 μs

 

0.45 μs

 

 

2.85 μs

 

0.60 μs

 

1.80 μs

 

1.80 μs

 

 

1.80 μs

 

1.80 μs

 

 

0.60 μs

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Write/read Recovery

SMK1 Gray Code SMK2

POS

A

POS

B

POS

C

POS

D

PAD

14.50μs

Servo

DATA

DATA

Servo

DATA

Frame

Frame

 

 

 

 

115.7 μs

 

 

 

Figure 4.7 Servo frame format

(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.

C141-E069-02EN

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Image 64
Fujitsu MPD3XXXAT manual Pos Pad, Data