Time Difference - Kenwood DP-1100 B Service Manual

3. OPERATION OF MAIN MICROPROCESSOR
Fig. 3 - 1 H s h o w s t h e o p e r a t i o n f l o w c h a r t of the kick search
s y s t e m . Further d e s c r i p t i o n is m a d e f o l l o w i n g this c h a r t .
[ 1 ] The stage N o . in w h i c h kick search o p e r a t i o n starts is
d e t e r m i n e d a c c o r d i n g t o the t i m e difference b e t w e e n the
p r e s e n t a b s o l u t e address a n d the searching
(TOC data s t o r e d in external R A M ) . H o w e v e r , w h e n X is
also d e s i g n a t e d as t h e s e a r c h i n g value w i t h the sear­
c h i n g address u n c l e a r ( e . g . TOC data n o t read o u t ) ,
stage 9 ( 2 5 6 tracks) is set.

Time difference

6 — 10 sec
Less than 6 sec
Searching address unclear
T a b l e 3 - 1 E S e t s t a g e and time difference
Fig. 3 - 1 G
Fig. 3-11 Operation model of kick s e a r c h s y s t e m
address
Set stage (number of tracks)
Stage 5 or 6 (15 or 31 tracks)
....Dependent on the present
pickup position.
Stage 5 ( 1 5 tracks)
Stage 9 (256 tracks)
[ 2 ] W h e n t h e s e a r c h i n g position is outside t h e p r e s e n t posi­
t i o n , f o r w a r d kick o p e r a t i o n in w h i c h the p i c k u p is m o v e d
by the n u m b e r of t r a c k s c o r r e s p o n d i n g to the stage N o . is
p e r f o r m e d . W h e n the
b a c k w a r d kick o p e r a t i o n in w h i c h the p i c k u p is m o v e d by
the n u m b e r of t r a c k s c o r r e s p o n d i n g to t h e stage N o . is
p e r f o r m e d .
[ 3 ] A f t e r c o m p l e t i o n of kick o p e r a t i o n , the present address
data is read o u t .
[ 4 ] J u d g e s w h e t h e r or n o t the p i c k u p crosses t h e s e a r c h i n g
p o s i t i o n . If it d o e s n o t c r o s s , step [ 2 ] is p e r f o r m e d a g a i n .
If it c r o s s e s , step [ 5 ] is e x e c u t e d . For e x a m p l e , w h e n t h e
address before kick o p e r a t i o n is T N O = 1 2 , X = 0 2 w i t h
the s e a r c h i n g data of T N O = 1 2 , X = 0 3 , f o r w a r d
o p e r a t i o n is p e r f o r m e d . After c o m p l e t i o n of kick o p e r a ­
t i o n , w h e n the address is of T N O = 1 2 , X = 0 2 step [ 2 ] is
e x e c u t e d a g a i n , w h i l e w h e n T N O = 1 2 , X = 0 4 , step [ 5 ]
is e n t e r e d .
•P-1100B II
s e a r c h i n g position is inside,
kick
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