What use is a 500MHz oscilloscope if it doesn't have a high frequency active probe interface? Well, there are several options including a cheap $5 DIY resistive probe. Demonstration of active FET probing vs Passive Probing vs DIY Resistive probing. A lot of material extracted from videos 1367 and 1368 https://www.youtube.com/watch?v=rzo4Ntxqu1E https://www.youtube.com/watch?v=WlSb8hdFtTY Forum: https://ift.tt/4pSY3vf 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 14:15 - Active FET probe example: Poor Grounding vs Good Grounding 19:44 - $5 DIY Resistive probe vs $3k Active FET probe 20:30 - What's going on here? The downside of resistive probes. 21:50 - Resistive probes are more tolerant of grounding 25:50 - Conclusion Web Site: http://www.eevblog.com Hardware Store: https://eevblog.store/ Merch Store: https://ift.tt/cXaMOHL If you find my videos useful you may consider supporting the EEVblog on Patreon: https://ift.tt/5SX3jBW Other channels: EEVblog2: http://www.youtube.com/EEVblog2 EEVdiscover: https://www.youtube.com/eevdiscover #ElectronicsCreators #oscilloscope
source https://www.youtube.com/watch?v=E3G9G79YErg
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