Author Topic: Altium has not calculate delay for spesific inner layers  (Read 306 times)

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Offline maddoxbey

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Altium has not calculate delay for spesific inner layers
« on: October 28, 2022, 10:21:39 am »

I am using version 20.0.10 and have an issue with delay calculations. For spesific layers in my design delay calculation does not work and stuck at zero ps, not incrementing. I have attached the screenshots. First ss shows the lane, delay shown as 0 for that layer but it works fine for top layer. The other ss shows delays in ps for whole line. Top layer has delays (can check it segment by segment) but this spesific inner layer adds zero delay. (By the way i have other inner layers and they are just work fine.)

I thought this is all about stack up and changed it lots of times but nothing changed. I attached the stack up also.

Can someone please help me about this? I am clueless right now. Is it because some option or ru─▒le or something? At the moment i have no idea and need enlightment.


Online PlainName

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Re: Altium has not calculate delay for spesific inner layers
« Reply #1 on: October 28, 2022, 06:16:08 pm »
Not got a clue, sorry, but I notice that all the ones showing 0ps have 'sign' preceding the length. Do the internal traces have the same impedance (they might be striplines as opposed to microstrips)?
previously known as dunkemhigh

Offline thm_w

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