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怎样设置CC1120的占用带宽？

user3843381
Intellectual 262 points
Other Parts Discussed in Thread: CC1120

怎样设置CC1120的占用带宽（OBW）？

CC1120设置占用带宽的寄存器是不是CHAN_BW？   我们需要将占用带宽设置低于8.5KHz，  Smart RF studio 设置RX filter BW 为8.333KHz，CHAN_BW 变为0x18. 但是我们用频谱仪测试时候（测试条件RBW：100HZ，VBW：100Hz，扫宽：50KHz，功率比99%）占用带宽为11KHz。 这里具体怎样设置占用带宽？

  • 0
    TI__Guru**** 252096 points

    参考数据手册 http://www.ti.com.cn/cn/lit/ug/swru295e/swru295e.pdf 30页

    RX Filter Bandwidth  

    The CHAN_BW.ADC_CIC_DECFACT and CHAN_BW.BB_CIC_DECFACT register fields control the RX filter  BW, together with the CHAN_BW.CHFILT_BYPASS register field and the crystal oscillator frequency. It is recommended to use SmartRF Studio to generate settings for a given RX filter BW.