Teledyne LeCroy WaveLink Differential Probe Series (13-25 GHz) - Manual (Page 17)

Operator's Manual
WL-HBW-A-OM-E Rev B 11
Positioner Tip (Browser)
The Positioner Tip (Browser) provides the ability to access the signal on the DUT without
permanently attaching a lead or other device to the DUT. The positioner tip combines high
performance with quick access to a variety of probe points when it's used as a hand-held browser
(using the Wand attachment) or as a fast and convenient method to re-position a fixed test point
(using a positioner tool, like Teledyne LeCroy's Freehand Positioner, XYZ Positioner or EZ Probe .
The carbon composite resistive pogo pin tips are adjustable from 0 to 3.5 mm (0 to 0.14") and have
0.55 mm (0.022") of Z-Axis compliance. Because of its thin form factor and spring-loaded tips, it is
ideally suited for use with multiple probes in tight areas such as the back side of boards with ball-
grid array packaged ICs.
The Positioner Tip supplied with the kit consists of two small, pre-installed carbon-composite
resistive pogo-pin tips with crowned metal caps for solid connection to the circuit. The carbon
composite resistive tips place the tip resistance as close to the circuit as possible. In addition, the
nature of the material and design minimizes skin effect at higher frequencies, a common problem
with a single conductive tip. The Positioner Tip provides the maximum signal fidelity and minimum
circuit loading at the highest frequencies.
Care should be taken when using the Positioner Tip. While the carbon composite material in the tip
is very strong, the high bandwidth nature of the probe means the diameter must be very small.
Avoid lateral motion against the circuit trace with the tip, and do not exceed the pogo pin Z-Axis
compliance.
NOTE: Some mechanical positioners (such as the EZ Probe) might have the capability to exert
excessive Z-Axis compliance during setup, so be extra careful with these types of mechanical
positioners.
Two replacement resistive tips are provided with the Positioner Tip. These tips may be replaced in
the field if the tip is damaged. See Correctly Replacing Carbon Composite Resistive Pogo-Pin Tips in
Dxx05-PT (on page 42) for more information.