Teledyne LeCroy Serial Data Debug Solutions - Manual (Page 195)

Operator's Manual
919586 RevA 195
Troubleshooting Storage, Peripherals, and Interconnects Issues
Polarity Correction
It is important to provide a high-quality signal when using the Serial Decode package. If bits cannot be
interpreted correctly the decode, of course, is bad.
If the signal is captured with the wrong polarity, it can easily be corrected later. If the capture is two single-
ended waveforms, then just try both subtraction orders; one of them is correct. If the signal is captured using a
differential probe, invert it (if necessary) using the Basic Math Invert operator as follows.
You can also invert your signal directly from the Channel dialog. Just touch the Invert checkbox on the right side
of the dialog.