Hitachi V-355 Operation Manual page 23

(3) Measurement of frequency and period
This will be explained taking the drawing at follows as
an example.
One period covers the time A and time B , which are sepa­
rated from each other by 2 .0 div on the screen.
When the sweep time is 1 ms/DIV, the period is give n by
1 ms/div x 2 . 0 = 2.0ms
=2.0 x 1 0- 3
Accordingly, the frequency is
1 /(2.0 x 1 0 - 3 )
(However, whe n the knob MAG x l O is at pulled out posi­
tion, TIME/DIV must be converted to 1 / 1 0 since the sweep
is magnified.)
20
s
500 Hz
=
Time A T im e B
(4) Measurement of time difference
Triggering signal source "SOURCE" is selected as offering
reference signal when me asuring the time difference be­
tween two signals. Assume that pulse trains as shown in (a).
Then (b) shows the case when CH 1 is take n as the triggering
signal source and (c) the case where CH2 is taken.
)
·.,
'
'- (a)
CHl ',.
Time
difference
CH2
(b)
CHl
,-­
'
'
- -'
CH2
(c)