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IWR6243: IWR6243 Cascade coherency and phase shifter calibration.

Attiya Mahmood
Intellectual 575 points
Part Number: IWR6243
Other Parts Discussed in Thread: AWR2243, AWR1843

Tool/software:

Hi,

I'm currently working on implementing the calibration process for the IWR6243 2-chip cascade device, as outlined in the following application note:

https://www.ti.com/lit/an/spracv2/spracv2.pdf?ts=1740429099901

This document includes detailed phase shifter accuracy plots for Gen 1 and Gen 2 devices (specifically, the AWR1843 and AWR2243). Is there a similar document from TI that provides such plots for the IWR6243?

Additionally, the application note provides TX phase shift calibration temperature correction LUTs for the AWR2243 (covering the 76–77 GHz and 78–81 GHz bands). Can TI share equivalent LUTs for the IWR6243 (60 GHz band)?

If not, could TI provide guidance on how to generate these phase shifter accuracy plots and temperature correction LUTs for our IWR6243 2-chip cascade setup.

Regards,

Attiya

  • 0
    TI__Genius 11880 points

    Hi

    Thanks for your query. Please allow us a couple of days to respond

    Regards

  • 0 in reply to Abhishek Karkisaval
    Intellectual 575 points

    Hi Abhishek,

    Do you have any updates? Looking forward to hear from you.

    Attiya

  • 0 in reply to Attiya Mahmood
    TI__Mastermind 37805 points

    Hi Attiya,

    We are still working on an answer. Give us 24 hours.

    Best,

    Nate

  • 0 in reply to Nathan Block
    TI__Mastermind 19620 points

    Hello.

    Attiya Mahmood said:
    This document includes detailed phase shifter accuracy plots for Gen 1 and Gen 2 devices (specifically, the AWR1843 and AWR2243). Is there a similar document from TI that provides such plots for the IWR6243?

    They are the same for both 6243 and 2243.

    Attiya Mahmood said:

    Additionally, the application note provides TX phase shift calibration temperature correction LUTs for the AWR2243 (covering the 76–77 GHz and 78–81 GHz bands). Can TI share equivalent LUTs for the IWR6243 (60 GHz band)?

    If not, could TI provide guidance on how to generate these phase shifter accuracy plots and temperature correction LUTs for our IWR6243 2-chip cascade setup.

    For the 6243, the sequence is as follows:

    1. Restore the calibration data

    2. Issue a profile config with RETAIN_TXCAL_LUT and RETAIN_RXCAL_LUT set to 0

    3. Issue a runtimecalib config API with OLPC/one-shot calibrations enabled and all periodic calibrations disabled

    -  In addition, force specific temperature indexes to specific temperatures, using table 3-1 for reference with the following values changed:

    • Recommended Temp Index for low bias LO DIST codes to 5 degrees C
    • Recommended Temp Index for mid bias TX Gain Codes to 45 degrees C
    • Recommended Temp Index for mid bias LO DIST codes to 45 degrees C.

    Sincerely,

    Santosh