Hitachi V-209 Operation Manual page 27

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Measurement
(3)
of frequency and period
This will be explained with the following figure.
One period covers the time A and time B, which are sepa­
rated from each other by 2.0 DIY on the screen.
When the sweep time is
1 ms/DIV x 2.0 = 2.0 ms
Accordingly, the frequency is
1/(2.0
(However, when the knob MAG x!O is at pulled out posi­
tion, TIME/DIY must be converted to I /10 since the sweep
is magnified.)
-
-
--
-
ms/DIY, the period is given by
I
=2.0
10-3
X
S
3
J0-
)= 500Hz
X
- - - -
Time A
Time B
(4) Measurement of time difference
Triggering signal source
ing reference signal when measuring the time difference be­
tween two signals. Assume that pulse trains as shown in (a).
Then (b) shows the case when
signal source and (c) the case where
(a)
�-
(b )
----
--
-
is selected as an offer­
''SOURCE"
CHI
is taken as the triggering
is taken.
CH2
,-
I
I
I
-_I
CH2
(c)
23

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