DCA1000EVM: Question for further processing of collected ADC raw data

Hi, 

I have the board AWR1642 and DCA1000.

I planned to collect the raw data with them and processed the data to get the vital sign of the human. 

I flashed the .bin file from the "Driver Vital Sign Lab" in  "Mmwave Automotive Toolbox" into the AWR1642 and acquired the ADC raw data through DCA1000. 

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My question is that what does the ADC raw data stands for? Is it the data that the Rx antenna actually received?

If yes, then how can I get the IF signal? My target is to get the IF signal, which is the output of the mixer, in order to apply further DSP algorithm and get the vital sign.

Is there any way I can get the IF signal from the board?   

Best, 

Angelo Yu