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IWR1642: What calibration procedure is required for mass producing a TI mmwave sensor system

rperezti
Genius 12650 points
Part Number: IWR1642
Other Parts Discussed in Thread: UNIFLASH

 My customer is new to mmWave sensing and they are interested to learn about the calibration requirements for mass producing this technology in a system. Are there per-unit calibration requirements? What is the procedure for calibration and what tools or equipment are required.

  • 0
    TI__Mastermind 37500 points
    Hello,
    If the customer has designed an antenna system for the mmwave sensor, that have to have a test environment to check that the antenna radiation pattern meets the design requirements. This usually involves a calibration horn antenna, test spectrum analyzer, RF down converter, and spectrum analyzer for Tx tests. In Rx tests this usually involves a IQ modulator, RF up converter, test spectrum analyzer, horn antenna, and positioning device.

    During engineering evaluation the antenna is evaluated. After the initial antenna test, it is important to have a test target, withe some means of varying the azimuth and elevation to precalculated angles and distance.

    If the customer utilizes the external XDS110 environment JTAG, JTAG_nRST, set SOP2, Control UART - they can adapt the Uniflash program so they can program their QSPI flash, alternately this can be done writing a CCS application.

    If the customer has a Host Processor, or stand alone sensor IO that is also needed.

    In some markets Radiated and Conducted Emissions tests can be mandated.

    A lot of these test and evaluations can be done initially with the EVM. (note: if a different antenna / dielectric lens is needed that changes this statement).

    Some RF test facilities can be contracted if the customer doesn't have the equipment for the first product.

    Regards,
    Joe Quintal
  • 0 in reply to Radio-Joe
    TI__Genius 12650 points

    Joe thank you for the excellent response. Just to finish this out, please confirm that there is no device level calibration required on a per-unit basis.

    -Ruben

  • 0 in reply to rperezti
    TI__Mastermind 37500 points

    Hello 

    The device does its own internal calibration, depending on the software configuration

    a) at initial turn on

    b) every 'n' minutes based on API setup

    c) (*) with factory calibration, does a partial calibration each cycle

    (*) in this mode there is an internal calibration, the user software stores the calibration data to a QSPI flash file - see TIDEP0091

    Regards,

    Joe Quintal