Agilent Technologies 54622A User Manual page 28

Getting Started
To use the digital probes (mixed-signal oscilloscope only)
7 Repeat steps 3 through 6 until you have connected all points of interest.
Ground
8 If you need to remove a probe lead from the cable, insert a paper clip
or other small pointed object into the side of the cable assembly, and
push to release the latch while pulling out the probe lead.
Replacement parts are available. See the Replaceable Parts chapter in the
Service Guide for details.
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Signals