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8 - 8
M e a s u r i n g T i m e R a t i o w i t h
The duty of a square wave can e a s i l y be measured w i t h t h e c u r s o r s .
1)
Apply the s i g n a l to the INPUT terminal.
to d i s p l a y the waveform a t an e a s y - t o - s e e p o s i t o n .
2 )
A d j u s t the w i d t h of a c y c l e to 5 d i v i s i o n s w i t h the H. VARI c o n t r o l .
3 )
P r e s s the CURSOR MODE s w i t c h to s e l e c t the time and frequency measurement mode.
the A R E F c u r s o r t o t h e t r a i l i n g edge o f t h e s q u a r e wave and t h e A
l e a d i n g edge.
4 )
When t h e H. VARI c o n t r o l i s s e t t o UNCAL, r a t i o / p h a s e measurement i s s e l e c t e d and
a c c o r d i n g l y the d i s p l a y e d d a t a r e p r e s e n t s the duty of the square wave.
8 — 9
M e a s u r i ng F r e q u e n c i e s
S i n c e the frequency i s found as a r e c i p r o c a l of a p e r i o d , measure the time ( p e r i o d ) of one
c y c l e and c a l c u l a t e i t s r e c i p r o c a l v a l u e .
1)
Measure t h e time of one c y c l e .
2 )
F i n d the r e c i p r o c a l v a l u e of the p e r i o d
42
Measured value
-
"
-
I
I J J J
J
U 1
Figure 16
' Measuring Time Ratio with
C u r s o r s
[ C S - 5 2 3 0 , 5 2 6 0 ,
Use the VOLTS/DIV and SWEEP TIME/DIV c o n t r o l s
cursor
Cursors
found.
5 2 7 0 ]
A l i g n
c u r s o r t o t h e
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