Hitachi V-209, Operation Manual

Page: 27 / 47

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- - --
(3)
Measurement
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
I
ms/DIY, the period is given by
1
ms/DIV x 2.0 = 2.0 ms
=2.0
X
10-3
S
Accordingly, the frequency is
1/(2.0
X
J0-3)= 500Hz
(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.)
----
-- - -
Time A Time B
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(4) Measurement of time difference
Triggering signal source
''SOURCE"
is selected as an offer­
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
CHI
is taken as the triggering
signal source and (c) the case where
CH2
is taken.
�-
(a)
(b)
I
I
-_I
,-
I
CH2
(c)
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