SWRA794A June   2024  – September 2024 AWRL1432 , AWRL6432 , IWRL1432 , IWRL6432 , IWRL6432AOP

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1 Acronyms Used in This Document
  5. 2 Introduction
  6. 3 Purpose of Calibrations
  7. 4 Typical Stages of Calibration
    1. 4.1 Factory Calibrations
    2. 4.2 APLL Calibration
    3. 4.3 Runtime Calibrations
  8. 5 List and Description of Calibrations
    1. 5.1 APLL Hardware Calibration
    2. 5.2 Synthesizer VCO Calibration
    3. 5.3 LO Distribution Calibration
    4. 5.4 Power Detector Calibration
    5. 5.5 TX Power Calibration
    6. 5.6 RX Gain Calibration
  9. 6 Software configurability of Calibrations
    1. 6.1 Software Sequence for Factory Calibrations
      1. 6.1.1 mmWaveLink Initialization
      2. 6.1.2 FECSS Power-On
      3. 6.1.3 APLL Power-On and Hardware Calibration
      4. 6.1.4 RF Channel Configuration
      5. 6.1.5 Trigger Factory Calibrations
      6. 6.1.6 Factory Calibration Data Store
      7. 6.1.7 APLL Power-Off
      8. 6.1.8 FECSS Power-Off
      9. 6.1.9 mmWaveLink De-Initialization
    2. 6.2 Software Sequence for Runtime (In-Field) Operation
      1. 6.2.1 Initialization
        1. 6.2.1.1 mmWaveLink Initialization
        2. 6.2.1.2 FECSS Power-On
        3. 6.2.1.3 APLL Power-On and Hardware Calibration
        4. 6.2.1.4 Factory Calibration Data Restore
        5. 6.2.1.5 Temperature Sensor Configuration
      2. 6.2.2 Profile Configuration
        1. 6.2.2.1 Profile Common Configuration
        2. 6.2.2.2 Profile Time Configuration
        3. 6.2.2.3 Frame Configuration
      3. 6.2.3 Runtime Calibration
        1. 6.2.3.1 Temperature Sensor Trigger
        2. 6.2.3.2 Runtime Calibration Configure and Trigger
        3. 6.2.3.3 Tx CLPC Calibration
      4. 6.2.4 Frame Trigger
        1. 6.2.4.1 Sensor Start
        2. 6.2.4.2 Sensor Status
        3. 6.2.4.3 Sensor Stop
      5. 6.2.5 Deep Sleep Entry and Exit
      6. 6.2.6 De-Initialization
  10. 7  Recommended Calibration Sequence: OLPC vs CLPC
    1. 7.1 Safety Application With OLPC Tx Power Cal
    2. 7.2 Non-Safety Application With OLPC Tx Power Cal
    3. 7.3 Application With CLPC Tx Power Cal
  11. 8 Summary
  12. 9 References
  13. 10Revision History

5.6 RX Gain Calibration

The RX chain consists of two amplifiers, that is, LNA and IFA. The RX chain gain is sum of gains from these two stages. The RX gain is calibrated to ensure that the overall RX gain is retained across process variations and change in temperature. RX factory calibration is done by feeding a signal level of known amplitude from the synthesizer to the Rx chain through on-chip loopback path. The Rx gain is analyzed by processing the ADC data amplitude and the Rx chain gain codes for desired gain are derived for three temperature bins, accordingly. These gain codes are applied during the runtime calibrations according to the respective temperature bin index.