DCA1000EVM: Question of using the DCA1000EVM to acquire ADC data from the IWR1642 for range-FFT analysis

Question of using the DCA1000EVM to acquire ADC data from the IWR1642 for range-FFT analysis
1. My parameter settings are shown in Figure 1, and the resulting range-FFT results are shown in Figure 2.
2. The range of the abscissa is -25m to +25m. I have doubts about this range, dmax=Fs*c/(2*S), where S=B/Tc, then dmax=Fs*c*Tc/(2 *B)
I set Fs=175K=175*10^3 (There is a question here, which one is the parameter setting Fs for HPF1 corner freqency and HPF2 corner freqency?)
c=3*10^8
Tc=60us=60*10^-6
B=1798.92MHz=1798.92*10^6
Dmax=Fs*c*Tc/(2*B)=175*10^3*3*10^8*60*10^-6/(2*1798.92*10^6)=0.8755m
The result is completely different from the range of range-FFT, so I wonder if the value of Fs is wrong. How can I calculate the maximum distance dmax according to the parameters I set? Which parameter or parameters is Fs determined by? Thank you.