Teledyne LeCroy QPHY-SATA - Manual (Page 32)

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915745 Rev G
TSG-06 – Amplitude Imbalance (Obsolete)
Note: This test was made obsolete by the SATA-IO. It can still be run, but it is not enabled by default. This test
measures the amplitude imbalance of the differential pair. It is measured on HFTP and MFTP patterns and only
for products running at 3.0Gb/s. It is calculated as follows:
Abs(TX+ amplitude – TX- amplitude) / Average(TX + amplitude, TX - amplitude)
Where TX+ and TX- amplitudes are determined from the mode of a persistence histogram of the high bit minus
the mode of a persistence histogram of the low bit. The persistence histograms use a 10% UI slice width at the
center of the UI (second UI for MFTP).