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the relationship between the sampling rate and the analog bandwidth of AD9361

Hi,

     there is a question confused me for a long time,I will be very appreciate if someone could help me!

     the issue is the sampling frequency how influence the rf_bandwidth?

     we know the max rf bandwidth is 56MHz when the sampling rate is 61.44Mhz.

     but I want configure the transceiver with tx sampling rate 40Mhz,and the rf bandwidth as 56Mhz. If that could happen?

If I want to configure the rf bandwidth as 56Mhz on matter what the sampling rate is,what should I do in my sw code?

     ps. I use the Microblaze NO-OS software running on the KC705 Xilinx platform.

     looking forward to hearing your reply! Thank you!

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  • Hi DragosB,

         I tried to use these functions to configure the rf bandwidth,but It's seems not work rightly.In my application,I make the tx/rx sample clock 40Mhz,and configure the tx_rf_bandwidth as 56Mhz.And transmit the wind noise into the tx path,but the spectrum width is limited as 40Mhz.And if I use the ad9361_set_tx_rf_bandwidth() function to set tx rf bandwidth less than 40Mhz , it works.But if more than 40Mhz,seems no reponse.I dont know why!


    Regards,

    Kevin.Wang

Reply
  • Hi DragosB,

         I tried to use these functions to configure the rf bandwidth,but It's seems not work rightly.In my application,I make the tx/rx sample clock 40Mhz,and configure the tx_rf_bandwidth as 56Mhz.And transmit the wind noise into the tx path,but the spectrum width is limited as 40Mhz.And if I use the ad9361_set_tx_rf_bandwidth() function to set tx rf bandwidth less than 40Mhz , it works.But if more than 40Mhz,seems no reponse.I dont know why!


    Regards,

    Kevin.Wang

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