Agilent Technologies InfiniiVision 3000 X- Series, Advanced Training Manual, Page: 17 / 128

Oscilloscope Familiarization Labs
2
3000 X-Series Oscilloscopes Advanced Training Guide 17
25
Press the Settings softkey; then press the Thresholds softkey.
26
Press the Lower softkey; then turn the Entry knob until it reads 20% .
27
Press the Upper softkey; then turn the Entry knob until it reads 80% .
28
To return to the previous menu, press the (Back) front panel key
(just above the power switch).
29 Press the (Back) key again because we descended two levels into
this menu.
30
Press the Type softkey; then turn the Entry knob until the arrow points
to
Rise Time
.
31 Now either press the
Add Measurement
softkey, or push the Entry knob
to add this measurement.
Using these user- defined measurement threshold levels (20% and 80%), our
rise time measurement should be faster because we are now measuring
across a shorter segment of the waveform as shown in
Figure 6 . The
measurement should now read approximately 30 ns. When we used the
scope’s default 10%/90% threshold levels, the measurement should have
read approximately 40 ns.
Let’s now make one more measurement before completing this lab. But
this time let’s perform a more comprehensive set of measurements on this
waveform.
32
Set the scope’s timebase to 500.0 ns/div .
Figure 6 Performing a rise time measurement relative to 20% and 80% threshold levels.
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