Increasing Measurement Accuracy
and Time-Interval Measurement
Time-Interval Measurements
If this pulse is a glitch and you need to know whether it violates the logic
threshold, the peak height error might make you believe that it does not.
Figure 9-7 shows pulse height error as a function of instrument rise time and
input pulse width.
Figure
9-7.
Errors
in
pulse
height
measurement.
You
can
approximate
the
error
in
pulse
width
measurements
by
substituting
\pulse width"
for
\rise
time
."
If
a
pulse
has
Gaussian
shape
and
its
width
is
greater than
three
times
the
instrument's
rise
time
,
the
error
in
the
measured
pulse width will be less than ve percent, and the error in peak height
measurements will also be less than ve percent.
9-17