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AWR2944: EMC problem

Xin Wang
Prodigy 190 points
Part Number: AWR2944

Tool/software:

Hi TI team，

     In AWR2944 checklist, it mentions these frequency, 400MHz, 800MHz, 1.2GHz and 2.4GHz. Which module inside the chip are the source of these frequency?

  • 0
    TI__Mastermind 30815 points

    Hello,

    I think that list is actually incorrect, that is from gen1 sensors. The clock tree will depend on your configuration. In the SDK the default clock tree is as below.

    So the main clock sources you would have are 600M, 720M, 1.8G as well as all of the clock divider outputs (200M, 150/300M, 360M, 240M). The sources are defined in the table above.

    However, we have seen the default SDK clock tree does not typically produce strong radiated emissions. The biggest source of radiated emissions will be from the RGMII interface. If you plan to use the RGMII interface you will need to design a shield for your module to meet CISPR25 class 5 limits. FCC and ETSI should be no problem to meet even with RGMII enabled as long as you have the interface routed properly and include series termination resistors.

    Regards,

    Adrian