Agilent 5989-5733EN Evaluating Oscilloscope Bandwidths for Your Application - Application Note c20140920 [13 free download

File name 5989-5733EN Evaluating Oscilloscope Bandwidths for Your Application - Application Note c20140920 [13

Keysight Technologies Evaluating Oscilloscope Bandwidths for Your Application Application Note Introduction Bandwidth is the specification that most engineers consider first when they se- lect an oscilloscope. In this application note we will provide you with some helpful hints on how to select an oscilloscope with the appropriate bandwidth for both your digital and analog applications. But first, let's define oscilloscope bandwidth. Table of Contents Introduction ...2 Defining Oscilloscope Bandwidth ...3 Required Bandwidth for Digital Applications ...5 Digital Clock Measurement Comparisons ...7 Required Bandwidth for Analog Applications...9 Summary ...10 Related Keysight Literature ...11 Glossary ...12 Defining Oscilloscope Bandwidth All oscilloscopes exhibit a low-pass frequency response that rolls-off at higher frequencies, as shown in Figure 1. Most scopes with bandwidth specifications of 1 GHz and below typically have what is called a Gaussian response, which exhibits a slow roll-off characteristic beginning at approximately one-third the