What is eye diagram in Matlab?
eyediagram( x , n ) generates an eye diagram for signal x , plotting n samples in each trace. The labels on the horizontal axis of the diagram range between –1/2 and 1/2. The function assumes that the first value of the signal and every n th value thereafter, occur at integer times.
What is eye diagram used for?
Simply put, an eye diagram is a data dependent electrical measurement used to evaluate high speed data quality. An eye diagram is measured in the time domain. And as with most time domain electrical measurements, variation in the measurement will occur in every set of samples.
What is an eye diagram display?
In telecommunication, an eye pattern, also known as an eye diagram, is an oscilloscope display in which a digital signal from a receiver is repetitively sampled and applied to the vertical input, while the data rate is used to trigger the horizontal sweep.
What is eye diagram in optical communication?
Eye Diagrams. The eye diagram is an intuitive graphical representation of electrical and optical communication signals. The quality of these signals (the amount of intersymbol interference [ISIJ, noise, and jitter) can be judged from the appearance of the eye.
How do you Analyse an eye diagram?
Interpreting an eye diagram A properly constructed eye should contain every possible bit sequence from simple alternate 1’s and 0’s to isolated 1’s after long runs of 0’s, and all other patterns that may show up weaknesses in the design.
What is unit interval in eye diagram?
The eye opening corresponds to one bit period and is typically called the Unit Interval (UI) width of the eye diagram. An ideal digital waveform with sharp rise and fall times and constant amplitude will have an eye diagram as shown in Figure 1 below.
What is data eye?
The data eye diagram is a methodology to represent and analyze a high speed digital signal. The eye diagram allows key parameters of the electrical quality of the signal to be quickly visualized and determined.
How can I improve my eye diagram?
In the PCB layout, first, the DP and DM signal should travel the same distance. Second, keep the DP and the DM trace difference impedance to 90 ohms in the PCB board. Third, keep the DP and DM trace away from the noisy power signal. We can also add the LC network in the DP and DM to boost the eye diagram.