Agilent Technologies InfiniiVision 3000 X- Series Advanced Training Manual page 17

25
26
27
28
29
30
31
Figure 6
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
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
3000 X-Series Oscilloscopes Advanced Training Guide
Press the Settings softkey; then press the Thresholds softkey.
Press the Lower softkey; then turn the Entry knob until it reads 20%.
Press the Upper softkey; then turn the Entry knob until it reads 80%.
To return to the previous menu, press the
(just above the power switch).
Press the (Back) key again because we descended two levels into
Back
this menu.
Press the Type softkey; then turn the Entry knob until the arrow points
to Rise Time.
Now either press the Add Measurement softkey, or push the Entry knob
to add this measurement.
Performing a rise time measurement relative to 20% and 80% threshold levels.
Set the scope's timebase to 500.0 ns/div.
Oscilloscope Familiarization Labs
(Back) front panel key
Back
Figure 6. The
2
17