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CC1312R: The data rate v.s. rx bandwidth on CC1312R

Nomo
Guru 16800 points

Part Number: CC1312R

Hello,

We want to set the data rate to 1.2kbps, rx bandwidth to around 40kHz and frequency to around 922MHz.
However, SmartRF Studio output warning error with these settings.
Is there any way to set the parameter?

Best Regards,
Nomo

  • 0
    TI__Guru**** 317180 points

    Due to how the modem is designed not all datarates are valid for a given RXBW setting. SmartRF Studio can be
    used to find if the planned combination of datarate, deviation and RX BW is possible. If one or more values are
    outside the valid range the tool will give an error message and the valid range.

    These limits can be modified by using bit repetition. This is covered in detail in this app note: https://
    http://www.ti.com/lit/pdf/swra566


    For CC13x2 bit repetition doesn’t require a separate patch. To turn the bit repition on, set .formatConf.fecMode =
    0x2 under CMD_PROP_RADIO_DIV_SETUP. The repition factor is set through the following override:
    HW_REG_OVERRIDE(0x5324,0x000X)
    Where x is the wanted factor.

  • 0 in reply to TER
    Guru 16800 points

    Hi TER-san,

    Thank you for your reply.
    If we had additional question, we'll create another post.

    Best Regards,
    Nomo

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