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CC8531: Does PPWC configuration relate to the RF performance?

Sean Auyeung
Expert 1025 points
Part Number: CC8531
Other Parts Discussed in Thread: CC2590

Hi engineers,

I found my CC8531 board's transmission range is limited. So I want to confirm whether the PPWC configuration will influent the RF performance, or just some problems exist in my RF circuitry design. Thanks!

My PPCW configuration files are as below.

wireless-8531.zip

Best wishes,

SeanOY

  • 0
    TI__Guru 58425 points

    Hi Sean,

    PPWC do impact the potential RF performance to some degree. To be more precise, it impacts the link budget you have based on which data rate you are using, number of audio channels, slaves etc. It also controls the RF output power and channels used (as well as allowing you to select if you are using and range extender or not).

    If the RF output power is maximum and the potential range extender is setup, then the performance would only vary based on the "link budget" items mentioned above. If all of these are correct to your design, then you need to investigate your RF network.

    Could you comment/elaborate on your current range etc?

  • 0 in reply to IUsedToBeARealPerson (M-W)
    Expert 1025 points

    Hi M-W,

    Related parameters as below were set.

    • Range extender (CC2590 HGM)"
    • Target TX power( 5 dBm)
    • RF data rate (5 Mhps)
    • Enable all types of supported sample rate
    • Enable left & right audio channel 

    After roughly measuring, the connection range is about 6 to 7 meters. Beyond this range, then they'll disconnect.

    Best wishes,

    SeanOY

  • 0 in reply to Sean Auyeung
    TI__Guru 58425 points

    Hi Sean,

    If you in the flashing view change from "Application Image" to "Production Test", you can use the Wireless Commander tool to perform some PER testing:

    https://www.ti.com/tool/PUREPATH-WL-CMD

    This tools also allows you to perform TX/RX signal level testing so that you can observe the signal strength of the TX device seen from the RX side. You would need to have one debugger per unit (one for TX, one for RX), do you have access to this?

  • 0 in reply to IUsedToBeARealPerson (M-W)
    Expert 1025 points

    Hi M-W,

    Thanks for your suggestion, now I could debug the devices with the tool you've mentioned. Maybe I can optimize the RF  performance by this way. Thanks again :)

    Best Wishes,

    SeanOY