Intel 1000BASE-T User Manual

100Base-TX Test Procedure for the 82544 Chip
1000BASE-T/100BASE-TX/10BASE-T Physical Layer Compliance Tests Manual
146 Intel Confidential
I.4.7 10% and 90% of Positive Peak Voltage Calculations
Figure I-11. Rise-Time, 10% Cursor (left) and 90% Cursor (right)
Four mid-level cursor positions
(two for each mid-level shoulder)
MLT-3
mid-level
(mV)
Two cursors, which “sandwich”
the pulse top.
Peak Level (mV)
Left shoulder, top cursor -6 Positive Pulse, top: upper cursor 972
Left shoulder, bottom cursor -42 Positive Pulse top, lower cursor 941
Right shoulder, top cursor -3 Averaged Pulse Peak Level (mV) 956.5
Right shoulder, bottom cursor -36
Average MLT-3 mid-level (mV) -21.75
10% voltage point on slope = (0.1 x (Averaged Peak - Averaged mid-level)) + Averaged MLT-3 mid-level
90% voltage point on slope = (0.9 x (Averaged Peak - Averaged mid-level)) + Averaged MLT-3 mid-level
10% pt = -21.75 mV + 97.825 mV = 76.075mV; 90% pt = 956.5 – 97.825 mV = 858.675mV
Target 10% point = 76.075mV
Target 90% point = 858.675mV

Intel 1000BASE-T Specifications

General

Brand	Intel
Model	1000BASE-T
Category	Adapter
Language	English