Fixture Deskew

This dialog is available from the following two buttons on the TDR/TDT toolbar:

	TDR Setup's TDR Fixture Deskew button. This access to Step Skew is only available under the following conditions: Differential or Common-Mode TDR steps are used True Mode selected (Mixed Mode is the default). To switch to True Mode TDR stimulus, click on the gear icon for the module block of the TDR Setup diagram. TDR Calibration disabled
	TDR Calibration Setup's Step 5. Step Deskew button. This access to Step Skew is only available when the TDR Calibration is disabled. TDR steps can be single-ended, differential, or common mode. The TDR stimulus can be Mixed Mode or True Mode.

TDR skew allows you to use two TDR step paths of unequal lengths to make differential or common stimulus measurements at the reference plane. TDR Step skew regulates the time differential between the launches of TDR steps. It is hardware delay to the actual TDR incident step. To deskew the test setup:

• Click TDR Fixture Deskew Wizard to run a guided deskew procedure, which is the easiest deskew method. Or,
• Manually entering the skew for each TDR step, clicking the step keys, or using the 86100D's front-panel knobs. The SW Delay value is a delay that is implemented in software. The actual skew adjustment consists of applying equal amounts of TDR and Horizontal skew to minimize round-trip measurement errors.

To open this dialog, click TDR Fixture Deskew in the TDR Setup dialog box or Step Deskew in the TDR Calibration Setup dialog box.