Kenwood DCS-8200 Instruction Manual page 58

Programmable digital storage oscilloscope
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A d j u s t
d i v i s i o n s on the CRT.
CRT.
By t h e a b o v e o p e r a t i o n ,
t h e sweep r a t i o a s an a n g l e o f 4 5
@
M e a s u r e t h e h o r i z o n t a l d i s t a n c e b e t w e e n two c o r r e s p o n d i n g
m u l t i p l y t h e r e s u l t by t h e sweep r a t i o
P h a s e d i f f e r e n c e ( d e g ) = h o r i z o n t a l d i s t a n c e ( d i v ) x
I n t h e a b o v e method,
w a v e f o r m w i t h o u t
A d j u s t
D I V
t h a t w a s
f o l l o w s u s i n g t h e n e w l y s e t SWEEP TIME/DIV.
P h a s e d i f f e r e n c e = t h e h o r i z o n t a l d i s t a n c e o f new sweep r a n g e ( d i v ) x
x
t h e SWEEP TIME/DIV s e t t i n g v a l u e used a s a r e f e r e n c e
An e a s y method i s t o u s e x i o MAG,
b)
C u r s o r measurement
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U s i n g
I t e m s ©
p o s i t i o n where i t can be e a s i l y m e a s u r e d .
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A d j u s t
t h e SWEEP T I M E / D I V and V A R I A B L E
t h e c e n t e r o f t h e CRT u s i n g t h e y
NOTE : W i t h c u r s o r m e a s u r e m e n t s , 5 d i v i s i o n s e q u a l 360 ° .
®
S E T t h e c u r s o r measurement mode t o
NOTE : P h a s e d i f f e r e n c e c a n be measured when t h e SWEEP TIME i s n o t s e t to CAL.
(D
A l i g n t h e A R E F
c e n t e r h o r i z o n t a l s c a l e
l a g g i n g p h a s e i n t e r s e c t s t h e c e n t e r h o r i z o n t a l s c a l e
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The measurement
4
R e l a t i v e measurements
When t h e a m p l i t u d e o f t h e s i g n a l u s e d a s a r e f e r e n c e , and t h e r e p e t i t i o n
s i g n a l v o l t a g e , p e r i o d , e t c . , c a n be measured w i t h o u t
I n t h i s method,
a r e u s e d f o r t h e unknown s i g n a l .
1)
V o l t a g e
T h i s
i s t h e s e t t i n g f o r t h e r e l a t i v e v e r t i c a l s e n s i t i v i t y used by t h e r e f e r e n c e s i g n a l
52
t h e V O L T S / D I V
a n d V A R I A B L E
A d j u s t
t h e y
one d i v i s i o n
t h e sweep r a t i o
c h a n g i n g t h e VARIABLE, u s i n g t h e SWEEP TIME/DIV.
t h e T R I G L E V E L a s n e e d e d .
s e t t o 8 d i v p e r c y c l e
t h e new SWEEP TIME/DIV s e t t i n g v a l u e
p r o c e d u r e s
and ©
o f t h e n o r m a l p r o c e d u r e s ,
c u r s o r w i t h t h e p o i n t w h e r e t h e s i g n a l w i t h
l i n e ,
and a l i g n
r e s u l t s a r e d i s p l a y e d f o l l o w i n g t h e PHASE d i s p l a y i n t h e upper r i g h t o f t h e CRT.
t h e r e l a t i v e u n i t s n e c e s s a r y
c o n t r o l s s o t h a t
one
POSITION c o n t r o l s to move b o t h s i g n a l s
e q u a l s
4 5 ( 3 6 0 / 8 d i v = 4 5 ° ) , t h e r e f o r e , d i s p l a y
0
/ d i v .
(45° / d i v ) .
4 5 ° d i v
i s 4 5 ° but t o f u r t h e r i n c r e a s e t h e a c c u r a c y ,
I n t h i s
c a s e ,
t o make t h e s e t t i n g v a l u e o f t h e SWEEP T I M E /
more a c c u r a t e ,
t h e p h a s e d i f f e r e n c e c a n be
w h i c h p r o v i d e s
t h e sweep c o e f f i c i e n t o f 4 . 5 °
a d j u s t t h e w a v e f o r m t o be o b s e r v a t i o n
so t h a t 1 c y c l e e q u a l s 5 d i v .
POSITION c o n t r o l s .
1 / A T .
t h e A c u r s o r w i t h t h e p o i n t w h e r e t h e s i g n a l w i t h t h e
l i n e .
u s i n g t h e SWEEP TIME/DIV d i s p l a y v a l u e .
f o r t h e measurements o b t a i n e d
c y c l e
o f t h e s i g n a l o c c u p i e s
to t h e c e n t e r of t h e
p o i n t s o f t h e two s i g n a l s ,
m a g n i f y t h e
4 5 ° d i v
Move t h e two s i g n a l s t o
t h e l e a d i n g p h a s e i n t e r s e c t s t h e
t i m e a r e known, t h e unknown
by w i t h t h e r e f e r e n c e s i g n a l
8
a n d
f o u n d a s
t o a

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