Understanding Differential Probes 

This video provides a short technical introduction to the differential voltage probes commonly used with oscilloscopes.
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Timeline:
00:00 Introduction
00:12 Suggested viewing
00:30 About single-ended measurements
01:31 About differential measurements
02:14 Two ways of measuring differential voltages
02:35 Two single-ended probes (quasi-differential)
03:26 Differential probes
04:22 Aside: twisting differential probe leads
04:58 Advantages and disadvantages of differential probes
05:50 Differential probe specification
06:12 Common mode rejection ratio (CMRR)
07:20 Differential mode range (DMR)
08:26 Common mode range (CMR)
09:24 Summary

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