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Changing gap for routed diff pairs

Hello,

I have many already routed diff pairs in a design. After some interal discussion we want to lower trace width and that in turn also lowers the primary gap for the differential signals.

Changing the trace width is easy, simply select the nets and right click to change line width. Is there something similar I can do to change the gap between the differential pairs without rerouting them?

Regards,

Filip

0 avant 7 months ago

Use the slide cline function.
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0 FilipSwe 7 months ago in reply to avant

The slide function only allows me to manually change gap for each diff pair trace. This would take a long time. Or do I misunderstand you?
To clarify I want to change the gap on many diff pairs at the same time.
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+1 steve 7 months ago

Look under Route - unsupported Prototypes for resize/resapce diffpair. Need at least an Allegro PCB Designer license to see this. Its a prototype feature so maybe not perfect but should help.
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0 DavidJHutchins 7 months ago in reply to steve

the info below is from another forum posting:

The Resize/Respace Diff Pairs command ignores 45-degree traces when tolerances are set to 0. From Setup > Constraints > Physical > Differential Pair > (+)Tolerance, set it to an appropriate small value, but non-zero. This will apply the modified spacing to the angled traces.
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0 FilipSwe 7 months ago in reply to DavidJHutchins

Thank you Steve and David. This helps a lot.
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