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AWR1443BOOST: Extract the ADC raw data of vital sign demo

Part Number: AWR1443BOOST

Hello

            I try to get the ADC raw data of vital sign demo. I use the capture demo and change the capture config  to like follow (this config is from vital sign) config.

           Red one is diffrent from capture config

flushCfg
dfeDataOutputMode 1
channelCfg 15 1 0
adcCfg 2 1
adcbufCfg 0 1 0 1
profileCfg 0 77 7 6 57 0 0 70 1 100 2000 0 0 40
chirpCfg 0 0 0 0 0 0 0 1
frameCfg 0 0 2 0 50 1 0

And I have a few questions 

1.Is it correct to get the ADC data of Vital sign by change the config?

2. ADC sampling frequency is 2000ksps, that means 1 sampling needs 0.5u sec. Total needs 50us, but the ramp end time is 57u sec. what happen in 50-57u sec?

3. How can I get the ramp start time?

Thank you.