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r 1 0 WC
Functional Description
7936 and 7937
264
WC------------------------------------------------------------------------------~.I
QUALIFYING
PULSE
~--_72~-----~--------------~~~--------78~----------~~
6 WC
I
TYP 8 PLCS---1
L
S7937A50
THIS TRANSACTION MUST CAUSE A
POSITIVE TO NEGATIVE VOLTAGE
CHANGE ON THE DISIT SIGNAL.
I I
~48WC~
I
TYP 4 PLCS
I
t
1/2
TRACK
l
I I
NOTE:
1.
WC (WRITE CLOCK)
78
ns
0
3600
RPM
t
1/2
TRACK
+
I I
GAP-L
EVEN TRACK
DI81T SIGNAL
DATA TRACK CENTER
ODD TRACK
DI81T SIGNAL
EVEN TRACK
TRANSITION PATTERN
ODD TRACK
TRANSITION PATTERN
Figure 5-13. Sampled Servo Code
5-73
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