Lab #3: Using Waveform Math - Agilent Technologies InfiniiVision 3000 X- Series Advanced Training Manual

Lab #3: Using Waveform Math

In addition to performing automatic parametric measurements on
waveform data, the oscilloscope can also perform math operations on an
entire waveform or pair of waveforms. One very common waveform math
function that you may want the scope to perform is to subtract one
waveform from another. For instance, if you were using standard 10:1
passive probes to capture waveforms on your circuit, you would be limited
to capturing these waveforms relative to ground only. But what if you
wanted to see what a waveform looks like across a particular component
where neither end of the component is connected to ground? In this case,
you could capture waveforms at both ends of the component relative to
ground, and then subtract one waveform from the other. Let's try it.
1
2
3
4
5
6
7
8
9
10
11
3000 X-Series Oscilloscopes Advanced Training Guide
Connect the channel- 1 probe to the Demo 1 terminal and ground.
Connect the channel- 2 probe to the Demo 2 terminal and ground.
Press [Default Setup] on the scope's front panel.
Press the [2] front panel key to turn on Channel- 2.
Press [Help]; then press the Training Signals softkey.
Select the Phase Shifted Sine signal using the Entry knob; then press the
Output softkey to turn it on.
Set channel- 1's V/div setting to 500 mV/div.
Set channel- 2's V/div setting to 500 mV/div.
Set the scope's timebase to 200.0 µs/div.
Press the [Math] front panel key (right- hand side of front panel).
Press the Operator softkey; then turn the Entry knob to select "-".
Oscilloscope Familiarization Labs
2
23