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ICGATIVE GATE
A339
POSITIVE GATE
A338
NEGATIVE OELAY
A3'"
ODD 0181T5
K310
Itol'
-~-LEAVING
000 (+) 0181T TRACK------tlil
r--
APPROACHIHG EVEN
( - ) - - - 1
DlIIT TRACK
+DIIIT
I
-DIIIT
~
________
~r--l~
_________
~r--l~
______ __
EVEN 0181T5
K3I1
__________________
~r__I~
__________________
~r__I~
________________
~r__I~
__________
~r___
IIIOTE: TIMING SIMPt.IFIED FOR CLARITY.
1M88
Figure 3-29.
Track Servo and Dibits Detect Circuit Simplified Signals
~
1--
50 p.SEC
Ol81TS
1111111111111111111
""' / nll"""HlII""' I II1I1Ift1' 1 1I1I11I11mIllIl"' " ' I IIII"""IIII1"""IIII1""' l IIl11l' 1 ' 1 ' 1 fllli ;
111111111110011111111111111111111111111
A 336
3 MSEC .--:.:~.--....;;r
.. :
~-------------~I~--------'-I---------------~
A337
7M89
Figure 3-30.
Dibits Detect
83318200
A
3-69
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