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IWR6843: Actual range of output power

Hideaki Shiranaga
Prodigy 190 points
Part Number: IWR6843

According to the data sheet, TYP output power of IWR 6843 is 12 dBm.

We have tested xWR6843ISK EVM in our chamber,

and it seems that  the output power is about 14 to 15 dBm.

We understand that there is some variation among the lots, but is it a normal result?

The data sheet dose not specify the MAX power as the figure bellow,

so we would appreciate it if you would let us know the actual MAX out power of IWR 6843.

(We set the output frequency to 60.0 to 60.5GHz.)

  • 0
    TI__Mastermind 32785 points

    HI, there:

    Could you let me know what demo you are running on the device?  Is boot time calibration part of it?  In general, if you are using the latest SDK out-of-box demo or radar studio, then the boot time calibration is already part of the RF initialization procedure.

    Best,

    Zigang

  • 0 in reply to zigang Yang
    Prodigy 190 points

    Thnak you for the replya, Zigang.

    We use the following SDK and toolbox.

      SDK：mmwave_industrial_toolbox_4_7_0,   Toolbox：long_range_people_detection

    We have not changed the settings about the transmitters from the default values.

    We guess that the output power does not depend on SDK nor the tools

    and we would like to know the variation of output power of IWR 6843 as a hardware.

     

  • 0 in reply to Hideaki Shiranaga
    TI__Mastermind 32785 points

    Hi:

    If you can run a one-time run-time calibration (CLPC mode for TX power calibration) after profile configuration. This will ensure the calibration is tuned to the center of the band being used.   With that, there will be a +/-2.2dB variation around the typical spec.  

    The calibration can be manually triggered easily through radar studio, but it will need a DCA1000 board.   Do you have one?

    Best,

    Zigang

  • 0 in reply to zigang Yang
    TI__Mastermind 32785 points

    Besides, can you let me know how you measure the TX power?

    Best,

    Zigang

  • 0 in reply to zigang Yang
    TI__Mastermind 32785 points

    HI, 

    The SDK out of box demo has the right calibration procedure.  For easy operation, you can just test the TX power with SDK out of box demo binary,  The TX power variation should be within 2.2dB from the datasheet. 

    Best,

    Zigang