Teledyne-lecroy QPHY-SAS3 Instrukcja Użytkownika Pobierz pdf (Strona 34)

The following figure from the SAS-3 specification provides a definition for the Rpre, Rpost, VMA, and

VHL. In each test each of these voltage levels are labeled on the oscilloscope display.

Figure 28 – Definition of Rpre, Rpost, VMA, and VHL

• Rpre is defined as V3/V2.

• Rpost is defined as V1/V2.

• VMA is defined as V2-V5.

• VHL is defined as the peak to peak voltage on the alternating bit portion of the waveforms.

34 922545 Rev A

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 49 50

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Teledyne-lecroy QPHY-SAS3 Instrukcja Użytkownika Strona 34