AWR1843: The spur in RD map

Hi jian,

we are looking into this query. we will get back to you by 20th october

Hi Jian,

The Tx-Rx The spur frequency depends on the Sampling rate. Are these spurs observed with different sampling rate?

You can refer to the Errata about the sampling frequencies significance causing the spurs.

AWR1843 Device Errata, Silicon Revision 1.0 (Rev. C) (ti.com)

Hi Kundan，

              Change sample rate，the spur will change with the sample rate。I have read the  Errata document of AWR1843, not to find any information about this case .Thanks.

Hi Kundan,

        The pin B11 is VIN_CLK of  1.8V supply for clock module. The clock module includes the ADC sample clock?   Need some special actions for this pin?  not to find the ADC sample clock block  in the clock  trees, how to generate  the ADC sample clock . Thanks.

Hi Jian,

It is advised to avoid the sampling rates which are mentioned in the below image. Could you please refer to the below image and try to change the sampling rate Fs to a different value.  

Hi Kundan

     I have tried change the sample rate to 11M, the 2D map is as following, the spurs are still there.Thanks.

Hi Jian,

Thanks for letting us know that you are observing these spurs for different sampling rate as well. Let me investigate this issue and come back to you. 

Also, Could you please let us know if you are observing this on TI's EVM or Custom hardware.