SPRACF4C June   2018  – January 2023 AWR1243 , AWR1443 , AWR1642 , AWR1843 , AWR1843AOP , AWR2243 , AWR2944 , AWR6843 , AWR6843AOP , IWR1843 , IWR6443 , IWR6843 , IWR6843AOP

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Purpose of Calibrations
    2. 1.2 Purpose of Monitoring Mechanisms
  3. 2Hardware Infrastructure to Support Calibration and Monitoring
  4. 3List of Calibrations
    1. 3.1  APLL Calibration
    2. 3.2  Synthesizer VCO Calibration
    3. 3.3  LO Distribution Calibration
    4. 3.4  ADC DC Offset Calibration
    5. 3.5  HPF Cutoff Calibration
    6. 3.6  LPF Cutoff Calibration
    7. 3.7  Peak Detector Calibration
    8. 3.8  TX Power Calibration
    9. 3.9  RX Gain Calibration
    10. 3.10 IQ Mismatch Calibration
    11. 3.11 TX Phase Shifter Calibration
  5. 4Impact of Calibration on Gain and Phase
  6. 5Impact of Interference on the Calibrations and Emissions Caused Due to Calibrations
  7. 6Scheduling of Runtime Calibration and Monitoring
    1. 6.1 Selection of CALIB_MON_TIME_UNIT
    2. 6.2 Selection of CALIBRATION_PERIODICITY
    3. 6.3 Application-Controlled One Time Calibration
  8. 7Software Controllability of Calibration
    1. 7.1  Calibration and Monitoring Frequency Limits
    2. 7.2  Calibration and Monitoring TX Frequency and Power Limit
    3. 7.3  Calibration Status Reports
      1. 7.3.1 RF Initialization Calibration Completion
      2. 7.3.2 Runtime Calibration Status Report
      3. 7.3.3 Calibration/Monitoring Timing Failure Status Report
    4. 7.4  Programming CAL_MON_TIME_UNIT
    5. 7.5  Calibration Periodicity
    6. 7.6  RF Initialization Calibration
    7. 7.7  Runtime Calibration
    8. 7.8  Overriding the TX Power Calibration LUT
    9. 7.9  Overriding the RX Gain Calibration LUT
    10. 7.10 Retrieving and Restoring Calibration Data
  9. 8References
  10.   A Calibration and Monitoring Durations
    1.     A.1 Duration of Boot Time Calibrations
  11.   Revision History

7.10 Retrieving and Restoring Calibration Data

The rlRfCalibDataStore and rlRfCalibDataRestore functions allow the retrieval and reprogramming of all calibration data from the device. These APIs can be used to store all calibration data to non-volatile memory at the factory and restore them at each power up.

The calibration data consist of 3 chunks of 228 bytes each. The rlRfCalibDataStore function reads one chunk of calibration data from the device at a time, and the rlRfCalibDataRestore function restores one chunk of calibration data to the device at a time.

The rlRfCalibDataRestore API must be called before rlRfInit is called.

Once the calibration data are restored properly and validated, the device will issue the AWR_AE_RF_INITCALIB_STATUS_SB report indicating the result of the calibrations based on the restored calibration data.

To save and restore the Tx phase shifter calibration, AWR_PHASE_SHIFTER_CAL_DATA_SAVE_SB and AWR_PHASE_SHIFTER_CAL_DATA_RESTORE_SB APIs can be used. If external phase shifter calibration is used, then the data must be collected around room temperature (25°C) and injected using the AWR_PHASE_SHIFTER_CAL_DATA_RESTORE_SB API.