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S71137A411
Functional Description
7936 and 7937
. . i--1----r---
1
.-70-1-U-SE-C
--------------:~.-RE-LA-T-IV-E H~A:E:::~ON-====~.--------------------~~I
AN INDEX MARK IS ENCODED IN THE FIRST SECTOR
OF THE DATA AREA CODE.
THE INDEX MARK CONSISTS
OF A REPEAT SECTOR MARK STARTING IN CELL 40 AND
ENDING IN CELL 55.
• A'&
~
PHASES (QUAD PHASES) ARE
USED FOR SAMPLED SERVO WRITING AND SEEKING.
Figure 5-12. Dedicated Servo Code
5-71
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