Application Examples
Looking at a Noisy Signal
The signal appears noisy and you suspect that noise is causing problems in your
circuit. To better analyze the noise, follow these steps:
1.
Push the
Acquire
button to see the Acquire Menu.
2.
Push the
Peak Detect
option button.
Peak detect emphasizes noise spikes and glitches in your signal, especially when
the time base is set to a slow setting.
Separating the Signal from
Noise
Now you want to analyze the signal shape and ignore the noise. To reduce random
noise in the oscilloscope display, follow these steps:
1.
Push the
Acquire
button to see the Acquire Menu.
2.
Push the
Average
option button.
3.
Turn the
Multipurpose
knob to highlight different numbers of averages from
the pop-up menu. As you push the knob to select a different number, you can
see the effects of varying the number of running averages on the waveform
display.
Averaging reduces random noise and makes it easier to see detail in a signal. In
the example below, a ring shows on the rising and falling edges of the signal when
the noise is removed.
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