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attenuated
into 1/10 before reaching the
counter.
T h i s attenuates noise-superimposed
input signals.
In addition, the
circuit preprocesses a signal w i t h rather a
high amplitude
into a reasonal level. A s a
result, accurate counting
3)
- S L O P E
switch
C H A N N E L A - S L O P E switch ©
to select negative-going edge or
. edge of an input signal to the C H A N N E L
input juck for
synchronization.
If this s w i t c h is pressed ( J L ) ,
edge is selected for synchronization w i t h the
frequency counter. If pressed again ( M L ) ,
positive-going
edge
is selected for synchroni-
zation w i t h the counter.
Note : If the input signals are handled in
the frequency measurement mode and
its measurement mode and its meas-
urement value is displayed in M H z / m s ,
t h i s switch is bypassed. A s a result,
the count operation
synchronization w i t h negative-going edge.
attenuation
is assured.
is provided
positive-going
A
negative-going
is carried out
in
4)
Trigger Level
Adjustment
The trigger
level of the input signals to
C H A N N E L A input juck can be changed by
T R I G
L E V E L control
The
functions of this
a .
If the
control
the trigger
level is preset to the
point of
input signals to the C H A N N E L
input juck.
b.
If the
control
the trigger
level moves to the earlier point
or the later point f r o m the preset center point.
For
detailed i n f o r m a t i o n ,
6 'Measuring Considerations'.
5-2
Period measurement
In the
period measurement mode, the cycle time
of each input signal is measured.
The cycle time f i n a l l y output by the counter
the average of a l l the cycle times of
number of cycles handled.
to be measured can be 1, 10, 100 or 1000.
® .
control
are as f o l l o w s .
is pressed ( P R E S E T p o s i t i o n ) ,
center
is pulled and then
rotated,
refer to Chapter
the
The number of
cycles
the
A
is
21
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