Teledyne LeCroy WaveMaster 8 Zi_Zi-A - Manual (Page 33)

Getting Started Manual
922133-00 Rev A 25
called earth) acts as a zero reference for the test point
measurement.
Differential Probes - Differential active probes are like two probes in
one. Instead of measuring a test point in relation to a ground point
(like single-ended active probes), differential probes measure the
difference in voltage of a test point in relation to another test point.

Passive Probes - Passive probes measure voltages at lower
frequencies (<500 MHz). They have higher input capacitance (input
C) and do not need power to operate (unlike active probes). At
higher frequencies, higher input capacitance loads the test circuit,
attenuating the signal. This is why active probes are used in high
frequency applications. Passive probes also measure voltage in
reference to ground.

High Voltage Probes - These are active, single-ended probes
designed to safely measure high voltages. They measure the voltage
in reference to ground.
Passive Probe Compensation
Passive probes must be compensated to flatten overshoot. This is
accomplished by means of a trimmer at the connector end of the probe.
1. Attach the connector end of your passive probe to any channel.
2. Connect the probe end to the CAL output connector at the front of
the oscilloscope. Ground the probe.
3. Adjust the trim pot at the connector end of the probe until the
square wave is as flat as possible.