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AWR1243: Questions about Table 5-4 of AWR1243 datasheet

KenF
Expert 7150 points
Part Number: AWR1243

Hello Experts,

We have questions about Table 5-4 of swrs188a.pdf.

(1) Let us know how to calculate 16.66Msps.
(2) Let us know the chirp configuration (start freq, Frequency Slope, etc) of this condition for our reference.
(3) Is there any reason that the sampling rate is 16.66Msps? Tha maximum sampling rate is 18.75Msps for AWR1243. We want to use 18.75Msps if possible.

Best regards,
Ken

  • 0
    TI__Guru*** 149154 points
    HI,

    Yes, as mentioned in the datasheet the maximum sampling rate is 18.75Msps for AWR1243. So you can use 18.75Msps



    Thank you
    Cesar
  • 0 in reply to Cesar
    TI__Expert 7150 points

    Hi Cesar,

    Thank you for answering (3). Please answer (1) and (2) as well.

    Best reagrds,

    Ken

  • 0 in reply to KenF
    TI__Guru 58035 points
    Hello Ken,

    >>(1) Let us know how to calculate 16.66Msps.
    The sampling rate is something the user configured in the profile configuration, its not computed.

    >>(2) Let us know the chirp configuration (start freq, Frequency Slope, etc) of this condition for our reference
    Parameters like start freq, slope etc. will not impact the power consumption. So you can set the values based on your requirement , the power numbers would be similar.

    Regards,
    Vivek
  • 0 in reply to Vivek Dham
    TI__Expert 7150 points
    Hello Vivek,

    For (1), how do you decide 16.66Msps?

    For (2), if the power consumption is measured value, then I want to know the chirp configuration you used during the measurements.

    Best regards,
    Ken
  • 0 in reply to KenF
    TI__Guru 58035 points
    Hello Ken,
    The reason 16.66 msps was selected is because it provides close to 15Mhz IF bandwidth , which is the max bandwidth AWr1243 support.

    Regarding the configuration used at our end for this measurement, we use 77Ghz, start frequency, 512 samples per chirp, 16.66 Msps, slope 10Mhz/usec, idle time 5 usec, ADC start time 2.5 usec, ramp end time 34.3 usec. Number of chirps per frame is 512 chirps and frame periodicity is 40 msec.

    Regards,
    Vivek