E2655C Probe Deskew and Performance Verification Kit User’s Guide
11
Verifying the Probe Calibration
If you have just successfully calibrated the probe, it is not necessary to perform
this verification. However, if want to verify the probe was properly calibrated, the
following procedure will help you verify the calibration.
The calibration procedure requires the following parts.
• BNC (male) to SMA (male) adapter
• SMA (male) to BNC (female) adapter
• BNC (male) to BNC (male) 12 inch cable such as the Keysight 8120-1838 (not
included in this kit)
• Keysight 54855-61620 calibration cable (Infiniium oscilloscopes with
bandwidths of 6 GHz and greater only)
• Keysight 54855-67604 precision 3.5 mm adapters (Infiniium oscilloscopes with
bandwidths of 6 GHz and greater only)
• Deskew fixture
For the following procedure, refer to
.
1
Connect BNC (male) to SMA (male) adapter to the deskew fixture on the
connector closest to the pincher.
2
Connect the SMA (male) to BNC (female) to the connector farthest from the
pincher.
3
Connect the BNC (male) to BNC (male) cable to the BNC connector on the
deskew fixture to one of the unused oscilloscope channels. For Infiniium
oscilloscopes with bandwidths of 6 GHz and greater, use the 54855-61620
calibration cable and the two 54855-67604 precision 3.5 mm adapters.
4
Connect the BNC side of the deskew fixture to the Aux Out BNC of the Infiniium
oscilloscope.
5
Connect the probe to an oscilloscope channel.
6
To minimize the wear and tear on the probe head, the probe head should be
placed on a support to relieve the strain on the probe head cables.
We recommend the Keysight N2787A 3D probe positioner for this.
7
Push down on the back side of the pincher. Insert the probe head resistor lead
underneath the center of the pincher and over the center conductor of the
deskew fixture. The negative probe head resistor lead or ground lead must be
underneath the pincher and over one of the outside copper conductors
(ground) of the deskew fixture. Make sure that the probe head is approximately
perpendicular to the deskew fixture.
NOTE
For the socketed probe head, insert two properly trimmed 82
Ω
resistors into the sockets.
Summary of Contents for E2655C
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