62 Keysight InfiniiVision HD3-Series Oscilloscopes User's Guide
3 Vertical Controls
To specify the probe skew
When measuring time intervals in the nanoseconds (ns) range, small differences in
cable length can affect the measurement. Use Skew to remove cable-delay errors
between any two channels.
1 Probe the same point with both probes.
2 For one of the probes, open the Channel dialog box by selecting the Channel
badge or by choosing Sources > Channel N... from the main menu.
3 In the Channel dialog box, select Probe....
4 Select the Skew field, and turn the Entry knob or enter the desired skew
value.
Each analog channel can be adjusted ±100 ns in 2.5 ps increments for a total of
200 ns difference.
The skew setting is not affected by pressing [Default Setup] or [Auto Scale].
To calibrate a probe
The Probe Check button guides you through the process of calibrating probes.
For certain active probes, such as InfiniiMax probes, the oscilloscope can
accurately calibrate its analog channels for the probe. When you connect a probe
that can be calibrated, the Probe Check button in the Probe dialog box becomes
active.
To calibrate one of these probes:
1 First, plug your probe into one of the oscilloscope channels.
This could be, for example, an InfiniiMax probe amplifier/probe head with
attenuators attached.
2 Connect the probe to the Probe Comp terminal, and the probe ground to the
ground terminal.
When calibrating a differential probe, connect the positive lead to the Probe Comp terminal
and the negative lead to the ground terminal. You may need to connect an alligator clip to the
ground lug to allow a differential probe to span between the Probe Comp test point and
ground. A good ground connection ensures the most accurate probe calibration.
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