SIGLENT SDS1000D Manual do Utilizador descarregar pdf (Página 132)

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3.4 Analyze the signal detail

You have a noisy signal displayed on the oscilloscope and you need to know

more about it. You suspect that the signal contains much more detail than you

can now see in the display.

3.4.1 Looking at a Noisy Signal

The signal appears noisy and you suspect that noise is causing problems in

your circuit. To analyze the noise better, follow these steps：

1）Press the “ACQUIRE” button to see the acquire menu.

2）Press the “Acquisition” option button or turn the “Universal” knob to select

“Peak Detect”.

3） If necessary, press the “DISPLAY” button to see “Display menu”. Turn the

“Universal” knob to adjust waveform intensity and grid brightness to see

the noise more clearly.

4）. Peak detect emphasizes noise spikes and glitches in your signal,

specially when the time base is set to a slow setting.

3.4.2 Separating the Signal from Noise

To reduce random noise in the oscilloscope display, follow these steps:

1）Press the “ACQUIRE” button to display the acquire menu.

2）Press the “Acquisition” option button or turn the “Universal” knob to select

“Average”.

3）Press the “Averages” option button to see the effects of varying the number

of running averages on the waveform display.

Averaging reduces random noise and makes it easier to see the details of a

signal.

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SIGLENT SDS1000D Manual do Utilizador Página 132