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AWR1243: Calibration Validity

Part Number: AWR1243

Looking at the list of subsystems that can be calibrated on the AW1243 under the RF_INIT_CALIB_ ENABLE_MASK, is there a description somewhere for each describing the validity of the calibration? For example in my past experience calibration executed at power up is good as long as device temperature had not risen more than 5 degree C. Once the temperature had changed the calibration was no longer considered valid and needed to be re-executed. For this device, of the following calibration options when is the calibration no longer valid and need to be re-executed?

Bit  Definition

4    Enable LODIST calibration
5    Enable RX ADC DC offset calibration
6    Enable HPF cutoff calibration
7    Enable LPF cutoff calibration
8    Enable Peak detector calibration
9    Enable TX power calibration
10  Enable RX gain calibration
11  Enable TX Phase calibration
12  Enable RX IQMM calibration

  • Hello Jonathan,
    You are right that the desired calibration values typically change with temperature . Within our firmware we monitor the device temperature periodically and every 10 deg change we can update the calibrations. If the periodic calibration mode is set then the changes are applied automatically after the number of frames configured in the CALIBRATION_ PERIODICITY (part of the AWR_RUN_TIME_CALIBRATION_CONF_AND_TRIGGER ). This period is user configurable.

    The user can also set one time calibration option if he wants to forcefully re trigger the calibrations.

    Regards,
    Vivek
  • Thanks Vivek, for my latency budget planning purposes is there a breakdown of how long calibration takes for each of the items that supports calibration?
  • Hi Jonathan,

    All calibrations are run at boot time which takes approximately 45ms. Only a sub-set of calibrations are run when the temperature changes approximately by 10 degrees from boot time. The run-time calibrations take around 9ms.

    Thanks,
    Sumeer