ADALM-Pluto Rev. D | Stopped to work after set Ext. Clock

    It's interesting.

    I'm using a Pluto HW version C, FW version 0.35

    And my external reference clock frequency is 38.880MHz.


    In my case, entering these variables does not work.
    fw_setenv refclk_source external

    fw_setenv ad936x_ext_refclk "<38880000>"

    The Pluto DOES switch to using the external clock, but the default setting for ad936x_ext_refclk persists after a reset.

    (In my case 40000115)

    So the Pluto is off frequency.


    To make it work, I have to enter:

    fw_setenv refclk_source external

    fw_setenv ad936x_ext_refclk_override "<38880000>"


    Then all is good, and the correct ref frequency setting is used by the Pluto.


    AB6RF