Intel 1000BASE-T

1000BASE-T/100BASE-TX/10BASE-T Physical Layer Compliance Tests Manual
Intel Confidential 87
10Base-T Transmitter Output Timing Jitter without Cable Model
4. Shift waveform to the right and find zero crossing at 8.0 BT ±7 ns (approximately 800 ns).
(The graphic below provides a reference.)
5. Set vertical cursors to record the maximum closing of the eye. The difference between the two
cursors should be recorded as the jitter measurement.
6. Shift the waveform to the right and find zero crossing at 8.5 BT ±7 ns (approximately 850 ns).
7. Set vertical cursors to record the maximum closing of the eye. The difference between the two
cursors should be recorded as the jitter measurement.
8.0 Bit Times (BT)
8.5 Bit Times (BT)