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AFE7952: FREQ-DDC-FILTER-CALC tool for under-sampling ADC

Part Number: AFE7952


I find out a good tool in TI;  

I set Fs=2900MHz,  Interleave=1,  Fc=2050MHz, BW=1MHz.

I get: Rx band=850MHz,  HD2=1200MHz, HD3=350MHz, HD4=500MHz, HD5=1350MHz

"slyt738.pdf" The TI doc. show HD2 is 2nd harmonic. I'm confuse it; Fc=2050MHz, 2nd Harmonic= 4100MHz. Does it correct??

Could you share how to calculate the frequency of Rx band, HD2~HD5, HD2 ~HD3 image, IL??   

Could I use the tool to design the under-sampling ADC ??