Скачать или смотреть EEVblog 1718 - Cheap 1GHz Oscilloscopes are Useless? ($5 DIY 1GHz Resistive Probe)

What use is a 1GHz oscilloscope if it doesn't have a high frequency active probe interface? Well, there are several options including a cheap $5 DIY resistive probe.
Practical demonstration of active FET probing vs Passive Probing vs DIY Resistive probing.

A lot of material extracted from videos 1367 and 1368
   • EEVblog #1367 - 5 Types of Oscilloscope Pa...  
   • EEVblog #1368 - Active Oscilloscope Probes...  

Forum: https://www.eevblog.com/forum/blog/ee...

00:00 - What use is a cheap 1GHz oscilloscope if it doesn't have an active probe interface?
02:30 - Capacitive reactance and tip capacitance
03:55 - High bandwidth passive probes
04:59 - Active FET probes to the rescue, right?
07:54 - DIY $5 1GHz Resistive probe
09:02 - DIY resistive probe explained
13:33 - Active FET probe example: Poor Grounding vs Good Grounding
19:02 - $5 DIY Resistive probe vs $3k Active FET probe
19:48 - What's going on here? The downside of resistive probes.
21:10 - Resistive probes are more tolerant of grounding
25:08 - Conclusion

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