Physical Sector Servo Configuration On Disk Surface - Fujitsu MPG3xxxAT Product Manual

CY1 n + 1
W/R Recovery
Servo Mark
Gray Code
Erase Servo A
Servo B
Servo C
Erase
Figure 4.5
(2) Servo burst capture circuit
The four servo signals can be synchronously detected by the STROB signal, full-wave rectified
integrated.
(3) A/D converter (ADC)
The A/D converter (ADC) receives the servo signals are integrated, converts them to digital, and
transfers the digital signal to the DSP unit.
4 - 14
IGB
Data area
expand
CY1 n
W/R Recovery
Servo Mark
Gray Code
Erase Servo A
Erase Servo B Erase
Erase Servo C
Servo D Erase
PAD

Physical sector servo configuration on disk surface

C141-E110-02EN
Servo frame
(126 servo frames per revolution)
OGB
CY1 n – 1
W/R Recovery
Servo Mark
Gray Code
Erase
Servo B
Erase
Servo D
(n: odd number)
Diameter direction
irection
Circumference d
Erase: DC erase area