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IWR6843: IWR6843

peter mccormick
Expert 1110 points
Part Number: IWR6843
Other Parts Discussed in Thread: AWR1642,

We have used the AWR1642 and are now using the IWR6843 in continuous chirp mode.  This is a finished product and the FCC test lab has it to do their testing.  They are trying to measure the radiated power but the chirp is so quick, they cannot Sync on it.  We can easily add a SYNC pulse on an IO pin but we cannot figure out a way in hardware or software to detect immediately before you send a chirp.

Is there a hardware pin on the IWR6843 that we can Sync on before you send a chirp?

Is there a software bit or interrupt that we can monitor immediately or during a chirp?

I don't know how the test lab can see the Tx chirp without a sync.  How do other test labs measure the RF chirp power?

Thanks

  • 0
    TI__Mastermind 25835 points
    Hello,

    This depends on how the instrument has been setup. As you rightly mentioned device need to be setup in the contentious chirping mode (i.e. Number of frames = 0). If the Antenna and instrument supports mmWave frequency band then it should it should show up between the frequency band of interest (60-64GHz).

    If there are down-converters are used with external LO. then down-converted IF band of frequency need to be looked at. In contentious chirping mode Sync Pulse is not needed to trigger the instrument for capturing chirp.

    Thanks and regards,
    CHETHAN KUMAR Y.B.