Altera JNEye User Manual

Page 187

Figure 4-9: Channel Characteristics of Victim and 2 FEXT Channels

Start the channel simulation by clicking Simulate in the lower right corner of the JNEye Control Module.

The JNEye Simulation Engine excises all the models and generates eye diagrams at test points and inside

the receiver (after CTLE and DFE).
A goal of this tutorial was for JNEye to automatically find the optimal link setting for both transmitter and

receiver. In the simulation time, the progress bar flashes multiple times, indicating the JNEye Simulation

Engine is exploring the solution space. The link performance and result of the final setting is shown in a

JNEye Data View.
At TX output, which is located after the Altera Arria 10 GT transmitter output pin (after the TX package

model), the results are shown in the following figure. JNEye found the optimal TX-FIR setting: Pre-tap 2

= 1, Pre-tap 1 = –6, Post-Tap 1 = –13, and Post-Tap 2 = 4. The configured transmitter generates ~0.32

UI of jitter at BER = 10

–15

. This set of TX outputs is measured with the transmitter’s intrinsic jitter and

additional sinusoidal jitter using the ideal clock reference.

4-10

Analysis

UG-1146

2015.05.04

Altera Corporation

Tutorial: 28 Gbps OIF VSR Link with Arria 10 GT