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Operating environment, Tf-dsq probe calibration and deskew fixture – Teledyne LeCroy TF-DSQ User Manual

Page 27

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TF-DSQ Probe Calibration and Deskew Fixture

TF-DSQ-OM-E RevC

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Despite differential probes measuring differentially, they can be used to measure common
mode signals. In this case, the V- tip is connected to ground, and the probe continues to
measure the difference between the tips. This is a useful configuration for identifying ground
problems.

The voltages in differential systems can be described by the following diagram and equations: