1. Yes, you can use the interface in picture 1 to get 1D/2D FFT results using mmWave Studio.
2. It is the device datasheeet.
IWR6843, IWR6443 Single-Chip 60- to 64-GHz mmWave Sensor datasheet (Rev. E) (ti.com) - section 8.10.11
AWR6443, AWR6843 Single-Chip…
Part Number: AWR6843AOP Other Parts Discussed in Thread: AWR6843 , AWR6443 , Is it possible to bypass or switch off the band-pass IF Filter in the receive chain of AWR6843 in order to get/measure the DC-offset of the I/Q channels? That filter exhibits a…