Waveform O B S E R V A T I O N A F T E R T H E T R I G G E R P O I N T - Kenwood DCS-8200 Instruction Manual

Programmable digital storage oscilloscope
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®
V e r i f y t h a t t h e READY LED
©
S t o r e and
o b s e r v e t h e s i g n a l .
©
Here, the t i m e ( T p r ) the from the t r i g g e r p o i n t o f the o b s e r v e d w a v e f o r m i s :
T p r = (PRE T R I G s e t t i n g v a l u e ( d i v )
t h e no.
of d i v i s i o n s from the l e f t edge of the CRT)
When t h e PRE
T R I G u n i t
T p r = PRE T R I G s e t t i n g v a l u e
{ t h e
no.
PRE
F i g .
2 )

Waveform o b s e r v a t i o n a f t e r t h e t r i g g e r p o i n t

U s i n g
t h e d i g i t a l d a t a o u t p u t a s c o n t r o l d a t a ,
t h e a n a l o g
d a t a
c h a n g e s ,
o s c i l l o s c o p e
t o o b s e r v e
p e r i o d s
a b o v e a c e r t a i n
a p e r i o d i c s i g n a l s o r t h o s e
can be o b s e r v e d u s i n g t h e p r o c e d u r e shown below.
©
I n t h e s t o r a g e NORM mode, s e t t h e s i n g l e - s w e e p
- t i m e
o p e r a t i o n .
©
N e x t , s e l e c t T R I G DLY
T h i s
i s u s e d t o s e t t h e p o i n t
t h e a f t e r phenomenon, a t w h i c h the measurement i s t o be p e r f o r m e d . The
A R E F c u r s o r o r the
©
U s i n g
the c o m p a r a t o r o u t p u t a s a t r i g g e r s o u r c e ,
®
V e r i f y t h a t t h e READY LED
©
S t o r e and
o b s e r v e t h e s i g n a l .
l i g h t s when t h e SINGLE s w i t c h i s p r e s s e d .
I f n e c e s s a r y ,
-
i s t i m e
( t i m e )
-
o f d i v i s i o n s from t h e l e f t edge of the CRT
T R I G w a v e f o r m
11
t h e r e a r e
c a s e s
i n w h i c h t h e d i g i t a l
t h e a n a l o g
d a t a .
F o r
v a l u e
c a n
be
o b s e r v e d w i t h a r e a l - t i m e o s c i l l o s c o p e , b u t
f o r w h i c h the r e s p o n s e of a n a l o g
i n the s t o r a g e
t r i g g e r mode, and make the t i m e s e t t i n g
i n t i m e ,
f r o m t h e t r i g g e r p o i n t o f
A c u r s o r .
l i g h t s when the SINGLE s w i t c h i s p r e s s e d .
I f n e c e s s a r y ,
r e p e a t s t e p s © ,
©
and
x
sweep r a n g e
x
sweep range
i n a s y s t e m w h e r e t h e d i g i t a l d a t a c h a n g e s a r e r e l a t e d
d a t a
t h i s k i n d of phenomena, t h e phenomenon h a v e
d a t a from t h e d i g i t a l d a t a o u t p u t t a k e s t i m e
mode w i t h t h e same o p e r a t i o n s a s t h o s e
s e t the t r i g g e r p o i n t and
r e p e a t s t e p s ® ,
©
and
@.
( s / d i v )
( s / d i v ) }
o u t p u t
i s u s e d t o t r i g g e r t h e
r e p e t i t i o n
a s
i n I t e m
f o r t h e
i n the p l u s
d i r e c t i o n .
t h e w a v e f o r m t o be
o b s e r v e d
s e t t i n g v a l u e i s s e t w i t h
t r i g g e r s l o p e .
® .
t o
1 ) ,
r e a l
t o
the
57

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