Keysight Technologies E2655C, User Manual

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E2655C Probe Deskew and Performance Verification Kit User’s Guide 7
Calibration for the Solder-in and Socketed Probe Heads
Calibration of the solder-in and socketed probe heads consists of a vertical
calibration and a skew calibration. The vertical calibration should be performed
before the skew calibration. Both calibrations should be performed for best probe
measurement performance.
Connecting the Probe for Calibration
The calibration procedure requires the following parts.
• BNC (male) to SMA (male) adapter
• Deskew fixture
• 50
Ω
SMA terminator
For the following procedure, refer to Figure 2 .
1
Connect BNC (male) to SMA (male) adapter to the deskew fixture on the
connector closest to the pincher.
2
Connect the 50 Ω SMA terminator to the connector farthest from the pincher.
3
Connect the BNC side of the deskew fixture to the Aux Out BNC of the Infiniium
oscilloscope.
4
Connect the probe to an oscilloscope channel.
5
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.
6
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.
7
Release the pincher.
NOTE
Before calibrating the probe, verify that the Infiniium oscilloscope has been calibrated recently
and that the calibration
Δ
temperature is within ±5 °C. If this is not the case, calibrate the
oscilloscope before calibrating the probe. This information is found in the Infiniium Calibration
dialog box.
NOTE
For the socketed probe head, insert two properly trimmed 82
Ω
resistors into the sockets.