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What is Common Mode Rejection Ratio (CMRR) and how to measure it on a high voltage differential probe or differential amplifier. Using the new Rohde & Schwarz MXO4 oscilloscope.
www.rohde-schwarz.com/us/prod...
Extended 30min version: • EEVblog 1521 - CMRR Fu...
Differential Probe How It Works: • EEVblog #932 - How Doe...
High Voltage Probe reverse engineering: • EEVblog 1415 - Reverse...
Oscilloscope Standard Deviation noise measurement: • EEVblog #1223 - Oscill...
Use coupon code ProbeyMcprobeFace for 15% of the HVP70 differential probe:
www.eevblog.com/product/hvp70/
Forum: www.eevblog.com/forum/blog/ee...
00:00 - What is CMRR?
01:53 - Why twist the wires?
03:26 - Typical CMRR figures
04:51 - How to measure CMRR - The Setup
08:54 - Remote R&S Oscilloscope desktop view & settings
11:22 - Output to input voltage ratio
11:58 - Beware of DC offset
13:36 - Does the 20MHz CMRR measaurement match?
14:02 - Input referred measurement
15:02 - Compensating for the gain
16:29 - Automated Frequency Response Analysis
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