Agilent Technologies 4000 X Manuel de service télécharger pdf (Page 157)

157

Agilent 4000 X-Series Oscilloscopes

Advanced Training Guide

Oscilloscope Bandwidth Tutorial

Defining Oscilloscope Bandwidth 157

Required Bandwidth for Analog Applications 158

Required Bandwidth for Digital Applications 159

Digital Clock Measurement Comparisons 162

Oscilloscopes have many different specifications that determine the

accuracy that signals can be captured and measured. But the primary

specification of an oscilloscope is its bandwidth. This tutorial on

oscilloscope bandwidth will provide you some helpful hints on how to

select an oscilloscope with the appropriate bandwidth for your digital and

analog applications. But first, let’s define oscilloscope bandwidth.

Defining Oscilloscope Bandwidth

All oscilloscopes exhibit a low-pass frequency response that rolls- off at

higher frequencies as shown in Figure 104. Most scopes with bandwidth

specifications of 1 GHz and below typically have what is called a Gaussian

frequency response. An oscilloscope Gaussian frequency response

approximates a single- pole low- pass filter.

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Agilent Technologies 4000 X Manuel de service Page 157