Maximum bandwidth of oscilloscope in undergraduate lab

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SUMMARY

The discussion centers on the bandwidth limitations of oscilloscopes used in undergraduate labs, specifically addressing the ability to measure signals with frequencies around 60 MHz. It is established that typical low-cost oscilloscopes have a bandwidth of approximately 60 MHz, which restricts their capability to accurately display signals with frequency components above this threshold. More advanced oscilloscopes can reach bandwidths of 3+ GHz, but these are significantly more expensive, often exceeding $100,000. The conversation clarifies the distinction between light waves and voltage signals, emphasizing the importance of bandwidth in signal measurement.

PREREQUISITES
  • Understanding of oscilloscope bandwidth specifications
  • Familiarity with signal frequency and sampling rate concepts
  • Knowledge of voltage signals and their frequency components
  • Basic principles of electronic measurement tools
NEXT STEPS
  • Research the specifications and features of oscilloscopes, focusing on bandwidth and sampling rates
  • Learn about the differences between analog and digital oscilloscopes
  • Explore advanced oscilloscopes with bandwidths exceeding 1 GHz
  • Investigate the impact of bandwidth on signal fidelity and measurement accuracy
USEFUL FOR

Students in electronics and engineering programs, educators in laboratory settings, and professionals involved in signal measurement and analysis will benefit from this discussion.

darkar
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Well, the lab script said a light wave with 60 MHz is too fast to be detected by oscilloscope so i did some search on the internet on the normal bandwidth(if i am rite, or it is called sampling rate?) is usuall more than 100 MHz. Doesnt this mean that measuring 60 MHz should have no problem at all? Or is that oscilloscope in undergraduate lab has lower bandwidth?
 
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What does "a light wave with 60 MHz" mean?
 
I believe you mean "a voltage signal with frequency components greater than 60 MHz," not a "light wave."

The cheapest 'scopes on the market have a bandwidth of about 60 MHz, meaning that they cannot faithfully display signals that have frequency components above 60 MHz. These 'scopes cost a thousand dollars or so.

The most expensive on the market have bandwidths of 3+ GHz. These scopes can easily cost $100,000+.

There's a good chance that your undergraduate lab uses rather cheap oscilloscopes. Generally, the bandwidth is printed prominently on the front of the instrument, by the way.

- Warren
 

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