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Working with differential pairs causing frequent crashes

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Message 1 of 3
joe.burks
97 Views, 2 Replies

Working with differential pairs causing frequent crashes

For days I have been trying to route an HDMI signal across a board, but I cannot do so because Fusion 360 keeps crashing when I attempt to meander of otherwise match lengths of the differential pairs. I've attached an image showing what I'm working with. The most important thing to note is that there is ONE (1) routed differential pair. Attempting to meander that pair to length match the two traces generally doesn't work and when I try to do it manually, Fusion 360 seems to mess with me for a bit until just crashing again.

joeburks_0-1666155003891.png

Apparently here my mouse pointer is NOT far enough away from the pair for it to attempt to meander:

joeburks_1-1666155095602.png

Moving my mouse closer, however, is far enough away for F360 to attempt a meander:

joeburks_2-1666155320604.png

Interestingly, the pre- and post- meander lengths are identical, despite both of them obviously increasingly in length. Also, the post- meander ratio is no better than the pre-meander ratio. I guess I'll have to do this manually:

joeburks_3-1666155677164.png

I have not been able to get a single differential pair routed and matched WITH NO OTHER SIGNALS CONNECTED. I've been at this for days.

2 REPLIES 2
Message 2 of 3
jorge_garcia2
in reply to: joe.burks

Hi @joe.burks ,

 

I hope this message finds you well. The issue you are running into aside, even if you could get all the signals routed they are all crossing over on each other, the signal integrity would be pretty bad and it's possible your design wouldn't even work. A better approach if possible for your application might be to have them mirrored one on the top of the PCB and one on the bottom.

 

That aside, would you be willing to share the files for review. I would definitely be interested in checking them out and having the developers find out what's causing the crash.

 

Best Regards,



Jorge Garcia
​Product Support Specialist for Fusion 360 and EAGLE

Kudos are much appreciated if the information I have shared is helpful to you and/or others.

Did this resolve your issue? Please accept it "As a Solution" so others may benefit from it.
Message 3 of 3
panpan_fan
in reply to: joe.burks

Hi @joe.burks 

I hope you are doing well!

For the meander crash, we have fixed it in the latest version V2.0.14567.

Please update Fusion 360 and try again, thanks!

 

Regards,

Panpan Fan

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