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S I G Nature Analysis; Logic Ana Lyze R; Clock Stopped; Clock R U N N I N G - HP 5363B Operating And Service Manual

Time interval probes
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M o d e l 5363 8
S e rv i c e
8 - 1 40 .

S i g nature Analysis

8 - 1 4 1 .
S i g na t u re a n a l y s i s e m p l o ys a u n i q u e d a ta c o m p re ss i o n tec h n i q u e that red u c e s a
l o n g , c o m p l e x d a ta stream patte rn o n a l o g i c n o d e i n to a fo u r c h a ra c t e r s y m b o l s i g n a t u re . 8 y
e xa m i n i n g a l o g i c n o d e w h ose c o r rect " s i g n at u re" i s k n o w n , a c o m p a ri s o n c a n b e m a d e w i t h
t h e c i rc u i t ru n n i n g at f u l l o p e rat i n g speed . 8y p ro b i n g va ri o u s n o d e s , f i n d i n g b a d s i g n a t u re s ,
a n d t h e n t ra c i n g t h e m b a c k to t h e f u n c t i o n a l o r i g i n , t h e a c t u a l fa u l t s o u rce c a n b e f o u n d . T h e
s i g n a t u res i n
Ta b le 8-2
N o s i g n at u re a p pea ri n g o n t h e 500 4 8 S i g n a t u re A n a l yz e r d i s p l a y
h a s a n y pa rt i c u l a r s i g n i f i c a n c e b e yo n d b e i n g a c o r rect e x p e c te d
s i g n a t u re o r a n i n c o r rect s i g n a t u re . T h e n u m be r i s , h ow e ve r, a
c o u n t re s i d ue i n t h e 5004A s h i ft reg i ste r , c o n ve rted to a n d d i s p l a ye d
i n a m o d i f i e d hexadec i m a l .
8 - 1 42 .
Ta ble 8-2
S i g n a t u re A n a l y s i s . S e p a rate proced u re s a re g i ven f o r t h e A 1 M ot h e rb o a rd a n d t h e A 5 H P- 1 8
I n t e rface .

Logic Ana lyze r

8 - 1 4 3 .
8-1 44 .
T h e 1 600A L o g i c A n a lzye r c a n be used t o m o n i t o r t h e state m a c h i n e . U s i n g t h e
fol l ow i n g h o o k u p p roced u re a n d t h e d e ta i l e d f l o wc h a rts i n
e xa m i n a t i o n of state m a c h i n e o p e ra t i o n can be o b se rved .
8 - 1 4 5 .

Clock Stopped

a .
D i s c o n n e c t t h e 536 3 8 powe r c o rd , a n d rem ove ca b i n e t c ov e rs .
b .
Ca ref u l l y pl ace I C c l i p s o n A 1 U 2 2 , U 2 5 . a n d U 2 8 .
8-1 46.

Clock R u n n i n g

a .
To c h e c k a n y pa rt i c u l a r a d d ress w i t h c l o c k r u n n i n g , s e t T R I G G E R W O R D s w i t c h e s to
t h e d e s i red a d d ress , T R I G G E R MODE to WO R D and rem ove t h e j u m pe r f ro m T P 1 a n d
T P 2 step f . T h e selected a d d ress w i l l b e " e n h a n c e d " a n d a p pea r at t h e t o p o f t h e
col u m n I f t h e 1 600A d oes n ot d i s p l a y , e i t h e r t h e state m a c h i n e d oes n o t n o r m a l l y step
t h ro u g h that a d d ress o r t r o u b l e e x i sts
b .
An a d d i t i o n a l te c h n i q u e w h i c h proves h e l p f u l u s e s t h e D E LAY m o d e o f t h e 1 60 0 A . S e t
D E LAY to O N , E N D . D I S P L AY a n d t h u m b w h e e l s w i t c h e s to 0 0 0 0 7 T h i s d i s p l ays t h e
s e l ected a d d ress e n c h a nced . t h e e i g h t states t h a t p re c e d e i t a n d t h e seven s t a t e s t h a t
fo l l o w i t .
8-32
h a ve b e e n d e t e rm i n e d e m p i ri c a l l y f ro m a k n o w n g o o d p r o d u c t .
N OT E
C o n ta i n s t h e h o o k u p p roced u re f o r t ro u b l e s h oot i n g t h e 536 3 8 u s i n g
a state - b y-state
Fig u re 8-9 .

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