Tandy 1000 SL Technical Reference Manual page 424

(11) Observe t h e waveform o f t h e DIF t e r m i n a l a t head unloading using t h e
o s c i l l o s c o p e .
SKA
DOUT
FALSE
A
Spike n o i s e i s allowed.
SKA DIF
c
l O O m s Residual r e a d l e v e l
(Unload l e v e l )
Head unload command
(Fig.3408) Read waveform a t head unloading
(12) Confirm t h a t t h e r e i s no unload l e v e l (excludes very small one) a t
lOOmsec a f t e r t h e unload command a s shown by d o t t e d l i n e i n Fig.3408.
Note: T h i s
i t e m
s h a l l be executed when t h e s i d e 1 head i s s e l e c t e d
(SIDE 1 i n d i c a t o r t u r n s o n ) .
I f t h e s i d e 1 head
i s
l i f t e d
too
high d u r i n g unload o p e r a t i o n ,
t a p p i n g sound i n c r e a s e s and d i s k wear w i l l be a c c e l e r a t e d , while
unload l e v e l w i l l be observed when it
i s too low.
(13) Confirm t h a t t h e
DATA
i n d i c a t o r ,
XXXX
( % )
o f t h e
SKA
i n d i c a t e s a v a l u e
w i t h i n t h e following range.
Head l o a d s e t t l i n g l e v e l :
7 0 % ,
Min.
(14) Key i n "F".
(STOP)
(15) I f t h e D S O i n d i c a t o r o f t h e SKA i s o f f , execute d r i v e s e l e c t by key
"0". (DSO i n d i c a t o r t u r n s o n ) .
(16) Key i n "Cl". (SEEK TMAX)
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3412
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