Embedding Probes - Teledyne Lecroy WaveLink Series Operator's Manual

Operator's Manual
for Replacing Damping Resistors on the Solder-in Interconnect Lead (on page 39), performance is
still guaranteed. If an interconnect lead tip is damaged beyond field repair and requires factory
replacement, Teledyne LeCroy recommends you return the probe platform/cable assembly and
amplifier module to the factory for a complete calibration and test to ensure guaranteed
performance. This is because there may be small differences in performance of interconnect leads
supplied at different times.
If a positioner tip (PT) is purchased at time of original shipment of the other probe components, this
is also calibrated and serialized with the other components. If it is purchased at a later date and you
have provided Teledyne LeCroy with the original probe serial number the tip is used with, Teledyne
LeCroy calibrates the positioner tip to your existing components and supplies a file on a
USB memory stick for installation on your oscilloscope. Follow the instructions provided with the file
and memory stick in order to load this file and ensure proper calibrated performance with your
existing probe components.
Finally, if the carbon composite resistive pogo-pins need to be changed on your PT tip, see Correctly
Replacing Carbon Composite Resistive Pogo-Pin Tips in Dxx05-PT (on page 42) for more
information.
D e - Em be dding Pr obe s
Teledyne LeCroy probes are calibrated at the factory using a Vector Network Analyzer (VNA) to
measure a system (probe plus test fixture) frequency response. The test fixture is de-embedded
from the measurement using Teledyne LeCroy's Eye Doctor tools so the remaining frequency
response is due to the combination of the test signal and the probe loading on the test circuit. The
system frequency response is then calculated for these remaining circuit elements.
Since the WaveLink probe impedance is high, the effect of probe loading is greatly reduced and the
impact on circuit measurement is much lower than when using a probe with lower impedance.
However,if you wish to de-embed the effect of probe loading on your circuit, you can also use
Teledyne LeCroy's Virtual Probe option. This option allows you to select the probe tip from a list of
supported tips. Your selection applies a corresponding s-parameter file that is derived from the
equivalent circuit model of the tip.
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