There are 2 Keysight N5172B connected that I can PING and simgen recognizes. The Scenario run does not take commands in .itf interference file automatically. How does SimGEN know Interference commands go to which interference generator? I tried sending command via TOOLS -> IEEE string send utility, it took "Identity" command, but not command "-, RF_ON_OFF,v1_a1,1,on", report BSD socket error.