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on the Display is not updated u n t i l ! the new
measurement cycle is completed.
Even if decimal point place and leading zeroes
are corrected, and a new measurement value
then appears on the L E D display, it may be
inaccurate due to display delay. Please keep it
in
mind.
6 - 3
Duty cycle measurement mode
The duty cycles of digit signals can be meas-
ured by placing the counter
v a l measurement
mode.
The duty cycle can be measured by
the two edges (negative-going
going edge) of the t w o signals on channels A
and B .
Select the positive-going
edge of T 1 ) of the
select the negative-going
of the signal on channel B .
The duty cycle measurement mode can s t a r t
the positive-going
detected and then ends when the
edge of the channel-B signal
in the time
inter-
specifying
edge and
positive-
edge (leading
signal on channel A
while
edge (tailing
edge of T 1 )
edge of the channel-A signal is
negative-going
is detected.
Use (+) slope for
while ( - ) slope for
See Figure 5.
Next, the period (place the counter
measurement mode t h a t is to be discussed next)
should be measured.
d a t a w i l l be used in the following expression to
calculate the duty cycle.
Duty cycle = T V c y c l e x 100%
when
Figure 5
the C H A N N E L A
selection
the C H A N N E L B selection.
in the
The measurement
period
Cycle •
Duty cycle measurement
period
35
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