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 1368https://www.youtube.com/watch?v=rzo4Ntxqu1Ehttps://www.youtube.com/watch?v=WlSb8hdFtTYForum: https://www.eevblog.com/forum/blog/eevblog-1718-is-a-cheap-1ghz-oscilloscope-useless-($5-diy-1ghz-resistive-prob/00:00 - What use is a cheap 1GHz oscilloscope if it doesn't have an active probe interface?02:30 - Capacitive reactance and tip capacitance03:55 - High bandwidth passive probes04:59 - Active FET probes to the rescue, right?07:54 - DIY $5 1GHz Resistive probe09:02 - DIY resistive probe explained14:15 - Active FET probe example: Poor Grounding vs Good Grounding19:44 - $5 DIY Resistive probe vs $3k Active FET probe20:30 - What's going on here? The downside of resistive probes.21:50 - Resistive probes are more tolerant of grounding25:50 - ConclusionWeb Site: http://www.eevblog.comHardware Store: https://eevblog.store/Merch Store: https://eevblog.dashery.com/If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblogOther channels:EEVblog2: http://www.youtube.com/EEVblog2EEVdiscover: https://www.youtube.com/eevdiscover#ElectronicsCreators #oscilloscope...https://www.youtube.com/watch?v=E3G9G79YErg

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