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I encountered an issue when configuring the number of ADC samples for AWR2243

han feng
Prodigy 50 points
Other Parts Discussed in Thread: AWR2243

When configuring the ADC sample count for a cascaded configuration of four AWR2243 devices, i modified the ADC sample count in the profile to 256 (by modifying the value of numAdcSamples in the structure rlProfileCfg_t), and then call to the rlSetProfileConfig API returned a successful write status. However, upon analyzing the data output, i discovered that the ADC sample count remained at 128.

I calculated that the data size for one frame of the AWR2243 is 12582912 bytes. Dividing this by 128 (number of chirps), by the number of transmit and receive antennas (12 * 16), and by 4 (number of bytes per sample), it arrived at an expected sample count of 128. Regardless of my modifications to the numAdcSamples value, the length of the data frame did not change.

I would like to understand why the configuration of numAdcSamples did not take effect and what possible reasons could lead to this situation.

  • 0
    TI__Mastermind 33385 points

    Hi,

    1) Can you confirm if you are using the TI EVM or a custom board?

    2) Can you also let us know if you decrease the number of ADC samples then is it reflected in the collected data?

    3) Can you let us know the other parameters which are being used in the profile settings and chirp settings?

    We will need to analyze this data to comment any further on the possible reasons for this observation.

    Thanks,

    Pradipta.