进SigXplorer时出现警告:7 x& P. n" Y/ ~2 i4 \$ F1 @
No reference plane is found for the trace to be extracted.4 _% n( ?7 i# Z8 P0 c8 W- y
The trace is being extracted as Microstripline just for topology viewing. N7 V6 P: I O" f0 M! K( G
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俺的是六层板,SGSSPS, ) C5 {" Z0 y( g+ e