5991-2714EN How to Select Your Next Oscilloscope_ 12 Tips on What to Consider Before you Buy - Appli part of Agilent 5991-2714EN How to Select Your Next Oscilloscope 12 Tips on What to Consider Before you Buy - Appli 5991-2714EN How to Select Your Next Oscilloscope_ 12 Tips on What to Consider Before you Buy - Appli, Agilent 5991-2714EN How to Select Your Next Oscilloscope_ 12 Tips on What to Consider Before you Buy - Application Note c20141010 [29].pdf text manual preview

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Keysight Technologies
How to Select Your Next Oscilloscope:
12 Tips on What to Consider
Before you Buy

Application Note
Introduction

You rely on your oscilloscope every day, so selecting the right one to meet your specific measurement
needs and budget is an important task. Comparing different manufacturers' oscilloscopes and their
various specifications and features can be time-consuming and confusing. The 12 oscilloscope
selection tips presented in this application note are intended to accelerate your selection process
and help you avoid some common pitfalls.
03 | Keysight | How to Select Your Next Oscilloscope: 12 Tips on What to Consider Before you Buy - Application Note

Tip #1: Bandwidth

Select an oscilloscope that has sufficient

Attenuation
bandwidth to accurately capture the highest 0 dB
frequency content of your signals -3 dB
There are a variety of oscilloscope specifications that deter-
mine how accurately signals can be captured and measured.
But an oscilloscope's primary specification is its bandwidth. So
what do we mean by "bandwidth"? All oscilloscopes exhibit a
low-pass frequency response that rolls-off at higher frequen-
cies, as shown in Figure 1. Most oscilloscopes with bandwidth
f BW
specifications of 1 GHz and below typically have what is called
a Gaussian frequency response, which approximates the char- Frequency
acteristics of a single-pole low-pass filter. The lowest frequency
Figure 1. Oscilloscopes exhibit a low-pass frequency response that rolls-off
at which the input signal is attenuated by 3 dB is considered higher frequencies.
the oscilloscope's bandwidth. Signal attenuation at the