Teledyne LeCroy WaveLink Differential Probe Series (13-25 GHz) - Manual (Page 44)

WaveLink Series Differential Probe (13-25 GHz)
38 WL-HBW-A-OM-E Rev B
Probe Deskew Fixtures
The Probe Deskew Fixture (PCF200) is provided as a standard accessory with WaveLink series
Platform/Cable Assemblies.
For WaveLink probes designed to accommodate all WaveLink tips (not at full bandwidth), the fixture
may be used as a convenient way to deskew several probes/oscilloscope channels. This can be
accomplished in the following ways:

Connect a fast edge to one or both inputs. Connect the probe tip(s) to the appropriate
connection point. Solder-in probe tips and browser tips may be inserted under the
clamping mechanism. Display the probe signals on the oscilloscope screen and use the
channel deskew adjust to align them to a common point.

Connect the WavePro/SDA/DDA 7 Zi/Zi-A, WaveMaster/SDA/DDA 8 Zi/Zi-A, or
LabMaster 9 Zi-A fast edge output to one of the inputs. Set the oscilloscope to trigger on
the internal Fast Edge source.Set the trigger delay to zero. Now, on the vertical dialog,
use the Probe Cal - Cable Deskew button to align one signal/channel at a time to the
specified zero delay trigger point (center of screen). Repeat for as many probes as you
have connected, each time aligning them to the common point.
NOTE: The Probe Deskew fixture has an inherent rise time limitation of ~70ps. Deskew of very high
frequency signals using WaveLink High Bandwidth Differential Probes may require a faster rise time
than this fixture can provide. In this case, utilize one of your signals as a reference point, and then
deskew all additional signals to the reference signal.
TF-DSQ Fixture Accessory
A TF-DSQ fixture is available as a Teledyne LeCroy accessory. The product is used in conjunction with
the oscilloscope software to perform probe deskew and DC calibration. A manual explaining the
operation of the TF-DSQ is available for download from teledynelecroy.com.