Signal Integrity Analysis in PADS Professional (2/6)
Welcome to the second lesson in PADS Professional Pre- and Post-Topology Analysis – LineSim Basics.
On first In this lesson, you learned how to export nets from a schematic to HyperLynx LineSim and assign models to the driver and receiver.
In today’s tutorial, I will cover some of the core functionality of PADS Professional HyperLynx LineSim, such as editing a transmission line and board stack.
Lesson 2 – LineSim Basics
- From the START menu select PADS Pro Tools VX.2.x> PADS Pro Designer VX.2.x
- From the PADS Professional Designer start page, select File> Open and open:
C: SI_Analysis Lesson2 HandDrillAll.prj - Repeat steps 3-5 of first lesson for start PADS Professional HyperLynx LineSim
- If this message appears, select #… This will open HyperLynx LineSim…
- Double click on the transmission line TL4 to edit it.
- make sure you simulate the transmission line type Uncoupled Stackup…
- go to tab Values and change the length to 4.5 inch… Notice how the electrical properties change (right) as the route properties change.
- click OK to exit the dialogue Edit Transmission Line…
- Now let’s open the board’s stack settings. Please select Setup> Stackup> Stackup Manager ……
- In the Stackup Manager, select Edit … for start Stackup Editor…
- Adjust target impedance values for calculating wire width
- click on tab Z0 Planning
- for layer SIGNAL_4, change the value in the column Target Z0 ohm from 75 to 65… Notice the change in the value in the column Width…
- click Applythen Close to apply settings
- click Close in the window Stackup Manager
- This concludes the lesson. Close HyperLynx and save the results…
Materials for this and subsequent lessons can be downloaded HERE
You can also watch a video version of this tutorial:
Previous lessons:
Lesson 1 – Assigning Models in LineSim
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Filipov Bogdan pbo, Product Manager for PADS solutions at Nanosoft.