WavePro 7 Zi and Zi-A Oscilloscopes
45
WP7Zi-GSM-E RevB
Probes
LeCroy offers a variety of passive and active probes for use with your X-
Stream oscilloscope. Visit
www.lecroy.com
for specifications and ordering
information.
Current Probes
- Current Probes measure the current passing
through a wire; current probes do not use the traditional probing
style of placing a tip onto a test point. Instead, a wire is placed
inside the jaw of the probe, which allows the probe to measure the
current (in Amps).
Active Probes
- There are two different types of active probes:
single-ended
and
differential
.
Single-Ended
- A single-ended active probe is associated with
measuring voltages at high frequencies. Measurement with an
active probe requires a test point and a ground point. The ground
(also 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.
