Lapho uklama amasekethe e-PCB anesivinini esikhulu, ukufaniswa kwe-impedance kungenye yezinto zokuklama.Inani le-impedance linobudlelwano obuphelele nendlela yezintambo, njengokuhamba phezu kongqimba olungaphezulu (i-microstrip) noma isendlalelo sangaphakathi (i-stripline/double stripline), ibanga ukusuka kungqimba lwereferensi (ungqimba lwamandla noma ungqimba lomhlabathi), ububanzi bezintambo, impahla ye-PCB , njll. Kokubili kuzothinta inani lesici lokuvimbela umkhondo.

Okusho ukuthi, inani le-impedance linganqunywa ngemuva kwe-wiring.Ngokuvamile, isofthiwe yokulingisa ayikwazi ukucabangela ezinye izimo zezintambo ezinokuphazamiseka okungapheli ngenxa yokulinganiselwa kwemodeli yesifunda noma i-algorithm yezibalo esetshenzisiwe.Ngalesi sikhathi, izinqamuli ezithile kuphela (ukunqanyulwa), njengokumelana kochungechunge, ezingagcinwa kumdwebo wohlelo.Nciphisa umthelela wokungaqhubeki ku-trace impedance.Isixazululo sangempela senkinga ukuzama ukugwema ukungaqhubeki kwe-impedance lapho ufaka izintambo.