Keysight 4000 X-Series, Руководство по продвинутой подготовке

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Oscilloscope Familiarization Labs
2
4000 X-Series Oscilloscopes Advanced Training Guide 25
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
Connect the channel-1 probe to the Demo 1 terminal and ground.
2
Connect the channel-2 probe to the Demo 2 terminal and ground.
3
Press
[Default Setup]
on the scope’s front panel.
4
Press the
[2]
front panel key to turn on Channel-2.
5
Press
[Help]
; then press the Training Signals softkey.
6
Select the Phase Shifted Sine signal; then press the Output softkey to turn it on.
7
Set channel-1’s V/div setting to 500 mV/div .
8
Set channel-2’s V/div setting to 500 mV/div .
9
Set the scope’s timebase to 200.0 µs/div .
10
Press the
[Math]
front panel key (right-hand side of front panel).
11
Press the Operator softkey and select "-". Change the Math voltage scale to
500mV/div using the knob above the
[Math]
front panel key.