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Why is it important to use an oscilloscope with more bandwidth than my device under test?

質問:

Why is it important to use an oscilloscope with more bandwidth than my device under test?

回答:

Without adequate bandwidth, your oscilloscope will not be able to resolve high-frequency changes. To calculate the oscilloscope bandwidth needed for your application, simply multiply the highest-frequency component of the signals you will be working with by a factor of five. For example, if your bus frequency is in the 800 MHz range, you may need an instrument with 4 GHz bandwidth or higher. This “5 times rule” will give you less than ±2% error in your measurements – typically sufficient for today’s applications.

Learn how bandwidth is defined for an oscilloscope »

The XYZ's of Oscilloscopes »


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FAQ ID 53761

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