Teledyne LeCroy QPHY-SAS3 User Manual

Page 40

In the measure section:

• Rpre(ML) (P9) is the precursor equalization ratio (Rpre) value which was returned from the

SAS3_EYEOPENING script. This is the measured value for TX – Rpre Ref1 (5.4.2.1). This value
must be greater than 1.05 and less than 1.49, inclusive.

• Rpost(ML) (P10) is the postcursor equalization ratio (Rpost) value which was returned from the

SAS3_EYEOPENING script. This is the measured value for TX – Rpost Ref1 (5.4.2.2). This
value must be greater than 1.19 and less than 1.68, inclusive.

• VMA(ML) (P11) is the VMA value which was returned from the SAS3_EYEOPENING script. This is

the measured value for TX – VMA Ref1 (5.4.2.3). This value must be greater than 80 mV.

• VHL(ML) (P11) is the VHL value which was returned from the SAS3_EYEOPENING script. This is

the measured value for TX – VMA Ref1 (5.4.2.3). This value must be greater than 850 mV and
less than 1.2 V.

• Rpre (P4) is the precursor equalization ratio (Rpre) value which was calculated as the ratio of the V3

and V2 points in the F4 waveform. This value is provided for additional information only.

• Rpost (P5) is the postcursor equalization ratio (Rpost) value which was calculated as the ratio of the

V1 and V2 points in the F4 waveform. This value is provided for additional information only.

• VMA (P6) is the VMA value which was calculated as the difference between the V2 and V5 points in

the F4 waveform. This value is provided for additional information only.

• VHL (P7) is the VHL value which was calculated as the difference between VH and VL in the F4

waveform. This value is provided for additional information only.

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