Hi Green, pls look at the following case, [Begin ICM Model] Example1 ICM_model_type S-parameter | [Nodal Path Description] Model_nodemap MyModelNodeMapA N_section ( A1 A2 B1 B2 ) Mult=3 SectA Model_nodemap MyModelNodeMapC | [End ICM Model] ... [Begin ICM Section] SectA [Derivation Method] Lumped [ICM S-parameter] File_name secta.s4p Port_assignment | Port Node 1 A1 2 A2 3 B1 4 B2 [End ICM Section] SectA In above case, the ICM model "Example1" includes a replicated section "SectA", between front-end port "A1 A2" and back-end port "B1 B2" there exist "three" series sections "SectA", but "Port_assignment" in the define of SectA indicates that between "A1 A2" and "B1 B2" only one section "SectA" exists, not three. So how to understand the circuit topology between "A1 A2" and "B1 B2" confuses me... Thanks in advanced Shawn ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu