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AWR1843: Start frequency variation of chirpCfg

Geogia
Prodigy 170 points
Part Number: AWR1843

Hi, 

What does this “start frequency variation” configuration mean? Is the starting frequency of chirp  starting from the starting frequency set in profileCfg, can it be gradually increased for following each loop? I didn't see a detailed explanation in either the SDK User Guide or the MMWalink doxgen. Please help answer, thank you.

  • 0
    TI__Mastermind 32845 points

    Hi,

    The start frequency variation in the chirp configuration API will only add the dither/variation as specified in this API to the start frequency parameter in the Profile config API. For example, if we configure a Chirp as follows: ChirpCfg(0,0,0,10,0,0,0,1) then it implies that chirp index 0 is mapped to profile 0 and the start frequency for this chirp will be adjusted by 10 units (10 * LSB value of this field) from the profile 0 start frequency. In your frame if you use chirp index 0 say 20 times all these 20 chirps mapping to index 0 will be same. All these 20 chirps will have the same variation in the frequency start value.

    Thanks,

    Pradipta.