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CC1120的SCAL、SAFC命令何时使用?

Other Parts Discussed in Thread: CC1120

在窄带长距离无线通讯中,使用CC1120,为了降低对外部晶振的漂移特性的要求,"Long-range RF communication:Why narrowband is the de facto standard"建议对频率偏移进行补偿。

我的问题是如何及合适进行频率补偿?每次TX或RX前都补偿吗?是使用SAFC吗?

另外,SCAL命令是用于标定频率合成器的,是否可以理解这是“粗”调或“粗”补偿,而SAFC为微调?

SWRZ039B中有关PATVERSION=0x21时执行的VCO标定,与SCAL的标定有何区别,使用场合及频次有和差异?

谢谢!

  • 是接收端进行补偿。就是在接收时检测到信号频率后进行补偿。你的应用的场景是什么?Frequency, Data Rate, Packet Size, Deviation, Rx BW 的设置是怎样的?

  • // Whitening = true
    // RX filter BW = 25.000000
    // Modulation format = 2-GFSK
    // Packet length mode = Fixed
    // Bit rate = 1.2
    // Deviation = 7.995605
    // PA ramping = true
    // Symbol rate = 2.4
    // Packet bit length = 0
    // Packet length = 9
    // Device address = 0
    // Carrier frequency = 434.000000
    // Manchester enable = true
    // Performance mode = High Performance
    // TX power = 15
    // Address config = No address check