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位时钟精度大于100PPM

Other Parts Discussed in Thread: CC1101

在位速率为250K的情况下,测量的位速率为249.925KHz,根据CC1101手册上关于位速率的计算公式得到的位速率值为249.938965KHz,

这样得到的位时钟精度为56PPM[(249.938965K-249.925K)/249.938965K],

但是如果按照250K的标称值计算位时钟精度的话得到的位时钟精度为300PPM[(250K-249.925K)/250K]。

问题是:哪一种是正确的呢?