Hi,
From HSDC Pro (TSW1400 GUI) point of view, only one path between transmission and receiver can be recognized at a time.
1) But you can connect DAC to TSW1406 and ADC to TSW1405 at the same time with separate HSDC Pro from two different PCs.
2) As long as you have two column text file (I/Q), you can import this pattern from your PC to HSDC Pro.
Thanks,
KW