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AWR1243: How to understand TX3 has a fixed offset with respect to TX1 and TX2

Wesley He
Expert 6145 points
Part Number: AWR1243

Hi team，

Customer found one description in AWR1xxx_Radar_Interface_Control.pdf

The TX3 has a fixed offset of -8dB gain and -8 degree phase with respect to TX1 and TX2 by design, user has to compensate these values in the gain and phase offset fields of this API for TX3. 

Is it means TX3 will have a fixed offset if AWR1243 did not run any calibration. And this offset can be calibrated by self-calibration feature?

After calibration, does it means we can get the same TX power and TX phase on all of TX1, TX2 and TX3 channel?

Thanks. 

  • 0
    TI__Guru*** 143484 points
    Hi,

    If I understand correctly, your question is whether the calibration is performed automatically by the device or if it has to be performed by the user. Is this correct?

    thank you
    Cesar
  • 0 in reply to Cesar
    TI__Expert 6145 points

    Hello Cesar,

    Customer ‘s question is without the calibration, what’s the TX power/phase difference between TX3 and TX1/2?

    Thanks

  • 0 in reply to Wesley He
    TI__Genius 14835 points
    Hi Wesley,

    The power/phase difference between TX3 and TX1/2 mentioned in the ICD relates only to the values reported by the monitor. The values reported by the monitor for TX3 need to be adjusted by the specified amounts before comparing with TX1 and TX2.

    There are no differences in functionality for TX3 and TX1/2.

    Best Regards,
    Anand