This document provides instructions for simulating an eye diagram using LTspice software. It explains that the .options "baudrate" command must be added to enable eye diagrams, with the baudrate set to the inverse of the period over one bit. It also describes how to enable the eye diagram plot, set the delay and number of eyes to simulate, and view the simulation results for different numbers of eyes.

1. Simulation of Eye diagram
Using LTspice
Bee Technologies Inc
http://www.bee-tech.info/
1All Rights Reserved Copyright (C) Bee Technologies Inc.2010

2. Simulation Circuit
2All Rights Reserved Copyright (C) Bee Technologies Inc.2010

3. .OPTIONS “baudrate”
• Add .options “baudrate” for enable eye diagrams on the schematic.
Set “Baudrate” = {1/PER} / 1Bit in 1Baud
3All Rights Reserved Copyright (C) Bee Technologies Inc.2010

4. Simulation Settings
[*10] to run show
number of eye and adds
[1.2ns] are delay [s]
4All Rights Reserved Copyright (C) Bee Technologies Inc.2010

5. Plot Settings> Eye Diagram> Enable
Select “Enable”
5All Rights Reserved Copyright (C) Bee Technologies Inc.2010

6. Delay[s] and No. of eyes settings
Right click on plot to change
6All Rights Reserved Copyright (C) Bee Technologies Inc.2010

7. Simulation Circuit
7All Rights Reserved Copyright (C) Bee Technologies Inc.2010

8. Simulation Result
No. of eyes = 1
No. of eyes = 10
No. of eyes = 1
C Respond
8All Rights Reserved Copyright (C) Bee Technologies Inc.2010