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When the scope is not attached, I could see both AC coupling and DC coupling options for the channel settings. The moment I attach the differential probe, the AC coupling option goes away. Any reason?

This was part of an experiment to measure the ripple of a voltage regulator output.

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  • \$\begingroup\$ how can you measure the difference between two signals if you remove the DC component from the signals? \$\endgroup\$
    – jsotola
    Commented Sep 9, 2020 at 5:15
  • \$\begingroup\$ well you could measure the AC difference... \$\endgroup\$
    – BeB00
    Commented Sep 9, 2020 at 5:38

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