Application Examples
Looking at a Noisy Signal
The signal appe
ars noisy and you suspec t that noise is causing problems in your
circuit. To better analyze the noise, follow these steps:
1. Push the Acqui
re Menu button.
2. Push the Mode bottom button.
3. Select the Peak Detect acquisition mode.
4. Increase the Waveform Intensity control to see the noise more easily.
Peak detect emphasizes noise spikes and glitches in your signal as narrow as 1 ns,
even when the time base is set to a slow setting.
The Re
ference chapter has more information about peak-detect and the other
acquisition modes. (See page 55.)
Separating the Signal from
Nois
e
Now you want to analyze the signal shape and ignore the noise. To reduce random
nois
e in the oscilloscope display, follow these steps:
1. Push the Acquire Menu button.
2. Push the Mode bottom button.
3. Select the Average acquisition mode.
Averaging reduces random noise and makes it easier to see detail in a signal. In
the next example, a ring shows on the rising and falling edges of the signal when
the noise is removed.
34 TDS3000C Series Oscilloscope User Manual
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