Calibrating The Probe - Agilent Technologies N1021B User Manual

Calibrating the Probe

The differential probe tips do not have a ground,
which is required for a calibration. However, due to
the short electrical length of the probe, the fre-
quency-dependent losses of the probe are small com-
pared to those of the cables. Use the following
procedure to calibrate the path to the input of the
probe.
1 On the 86100C, click Help > Contents on the menu
bar. This will open the online help.
2 In the online help, click TDR/TDT Mode > Tools >
Differential Skew > To adjust differential TDR
skew.
3 Follow the steps in the To adjust differential TDR
skew topic to perform the following items:
■ Module calibration
■ De-skew the two test-setup cable paths
■ TDR measurement setup
■ TDR calibration.
Use the N1021B kit's phase-matched cables for the test
N O T E
setup cables referred to in the procedure. Do not connect these cables
during the module calibration. The cables must be connected for the
remaining steps in the procedure.
The test device is the N1021B probe.
N O T E
When the TDR calibration instructs you to disconnect every-
N O T E
thing from the module, leave the cables connected to the module; the
cables must be included in the TDR calibration.
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