Performance veri
fi
cation
19.
Adjust the position controls on the sampling
oscilloscope to display the entire leading
edge waveform.
20.
Use the measurement capability of the
sampling oscilloscope to display rise
time: Increase the stability of the pulse
edge measurement by using averaging,
if available. Rise time is determined from
the 10% and 90% amplitude points on the
waveform. Record the rise time as t
s+p
.
21.
Using the test system rise time (t
s
) that
you measured in step 13, and the test
system and probe rise time (t
s+p
) that
you measured in step 20, calculate the
probe-only rise time using the formula
shown.
22.
Check that the calculated rise time meets
the probe speci
fi
cation.
23.
Record the results on the test record.
Example:
58
TAP2500, TAP3500, and TAP4000 Instruction Manual
