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Original question:

AWR1642: How to enable and get the RF calibration/monitor and BIST info

CCS/AWR1642: How to enable and get the RF calibration/monitor and BIST info

kuenlung Lin
Prodigy 20 points
Part Number: AWR1642

Tool/software: Code Composer Studio

why RX gain can't enable ?

  • 0
    Prodigy 20 points
    I have some questions
    (1) Complete the boot time calibration,for example: read the temperature value of 37;
    (2) manually set the Tx Gain & Rx Gain value of the LUT at [30~40] degrees;
    (3) Result: Run time calibration, Tx Gain It can be updated back to the original set value; but Rx Gain cannot be calibrated back to a reasonable
    value. Why?
    (4)How is the applicability of Rx's LUT guaranteed? Does the four Rx only need a set of LUT values?
          a). How about make sure Rx gain calibration not to saturate ?.
          b). Why can use A set of Rx LUTs to map to 4 Rx? if total gain of each RX channel is different
  • 0 in reply to kuenlung Lin
    TI__Expert 7215 points
    Hi,

    RX Gain Calibration is based on LUT but TX Gain also do close loop calibration by measuring the signal and updating the LUT.

    ADC saturation is indicated in Chirp Quality data but there is no Automatic gain control to mitigate saturation of ADC. Host can update the RX Gain target using API.

    Same Gain is programmed for all RX channel. There is no individual RX gain control for different Channel. For calibration, we take the average and apply to all channels.

    Regards,
    Kaushal