See digital signal integrity the way engineers do. Overlay thousands of received symbol traces into the classic eye — and watch ISI, noise, and jitter close it.
Eye Diagram StudioLive
digital comms signal integrity
Controls
Overlay many received traces aligned to the symbol clock. A wide-open eye = easy detection; ISI, noise, and jitter close it.
Reading this result: A wide-open eye means easy, low-error detection — the +1 and −1 levels are cleanly separated at the sampling instant. Here the eye height is 1.67 (of a possible 2) and the eye width is 52% of the symbol period. ISI, noise, and timing jitter all close the eye; raised-cosine shaping trades bandwidth (larger β) for less ISI, and a higher β widens the eye.
Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.
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How it works
An eye diagram overlays many two-symbol windows of a received waveform, aligned to the symbol clock. A random 2-PAM/NRZ bit stream is pulse-shaped — rectangular NRZ or a raised-cosine pulse with adjustable roll-off β — then passes through a bandlimited channel with additive noise and optional timing jitter. The vertical opening at the ideal sampling instant is the eye height (margin against noise); the horizontal opening is the eye width (margin against timing error). Raised-cosine shaping satisfies the Nyquist zero-intersymbol-interference condition p(kT)=δ[k]: raising β trades occupied bandwidth for a wider, more forgiving eye, while noise and jitter squeeze it shut.
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Ask the AI about this model
The math, the assumptions, real-world uses, or a code translation — explained for this exact simulation.
Is this eye diagram ISI pulse shaping tool really free?▾
Yes. Eye Diagram runs entirely in your browser using your device's own compute, so local use is free forever. You only pay Compute Tokens if you scale a job to the cloud.
Do I need to install anything?▾
No. Everything runs client-side in a modern browser — no downloads, no license, no account required to start.
Can I save or share my simulation?▾
Create a free account to save projects, and use a shareable embed or minted DOI to publish a live, interactive version anywhere.
How accurate are the results?▾
The solver uses established numerical methods, but results are for research and educational purposes and should be validated against experiment or professional review before you rely on them.