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怎样设置CC1120的占用带宽(OBW)?



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?