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Original question:

IWR6843AOPEVM: mmWave Demo Visualizer Image Band

IWR6843AOPEVM: IWR6843AOPEVM

Cynthia Wang
Prodigy 40 points
Part Number: IWR6843AOPEVM

Hello, 

I previously asked about viewing and accessing the x2 complex data utilizing the mmWave demo visualizer in this thread. We are interested in utilizing the spectral content of this band and appear to have setup up the hardware to sample and output these ADC values, but cannot plot the "negative" distance in the visualizer. 

Please let me know if there is anything besides the hardware sampling setting that I would need to change to access the negative spectrum!  

Best, 

Cynthia 

  • +1
    TI__Expert 7510 points

    Hello,

    If you access the raw ADC data with the complex 2x mode the image band will be visible, but it will not be negative. Assume that you have a max range of 10m when complex 2x mode is not enabled. When you go to complex 2x mode your max range will be 5m, but you will still see content from 5-10m this is your image band. Note since there will only be noise and possibly interference from other sources in this band, none of the single of interests content will be in that image band.

    Best regards,

    Connor Desmond