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Signal Integrity
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Signal Integrity
Signal Integrity
Browse our library of resources to learn more about pcb design and signal integrity.
What is Signal Integrity?
PCB Design Fundamentals
xSignals in Altium
Signal Integrity Stimulus Design Rules
Basics of Signal Integrity Analysis
Overview
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Technical Documentation
Preparing the Design for Signal Integrity Analysis
This article walks you through the setup work required before running Signal Integrity analysis in Altium Designer, so you can avoid invalid results and understand what the analyzer needs from your design. It explains which nets can actually be analyzed, why correct component and pin model assignments matter, how supply net rules and PCB layer stack settings affect the process, and how to use the…
Technical Documentation
Configuring and Running a Signal Integrity Analysis
This article walks you through how to configure and run a signal integrity analysis in Altium Designer, from the initial SI Setup Options through using the Signal Integrity panel to review screening results, investigate failed or unanalyzed nets, and adjust preferences. It explains what happens in schematic-only mode, how default tolerances and rules are applied, and how to use the available…
Technical Documentation
Working with Signal Integrity Analysis Results
This article walks you through how to read and work with signal integrity analysis results in Altium Designer, focusing on how reflection and crosstalk data are organized in the SDF document, what charts, plots, and waveforms represent, and how different termination settings and sweep options affect what you see. It also explains how to cross probe from a waveform back to the PCB after post…
Technical Documentation
Signal Integrity Analysis (by Altium)
Altium Designer includes pre-layout and post-layout Signal Integrity analysis capabilities. Altium Designer's Signal Integrity Analyzer uses sophisticated transmission line calculations and I/O buffer macro-model information as input for simulations. Based on a fast reflection and crosstalk simulator model, the Signal Integrity Analyzer produces accurate simulations using industry-proven…
Technical Documentation
SI Analyzer by Keysight
More and more modern electronic devices incorporate high-speed PCB designs, and signal speeds grow as the technologies evolve (17 GHz in DDR6, 400 Gbps in QSFP++, etc.). Ensuring signal integrity (SI) is a crucial step in the high-speed design. Failure to meet the requirements of the interface developer is very likely to cause problems in further design stages, manufacturing, and performance. To…
Technical Documentation
Analyzing Design Signal Integrity
Technical Documentation
Analyzing Your PCB Design
Technical Documentation
Signal Integrity Rule Types
The design rules of the Signal Integrity category are described below. The Signal Integrity category of design rules. Signal Stimulus Default Rule: not required This rule specifies the characteristics of the stimulus signal used when performing a signal integrity analysis on the design. This is the signal that is injected at each output pin on the net under test. The worst-case result is returned…
