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CC8520: RF frequency accuracy specification

Part Number: CC8520

Hi,

We are using the RFT_TXTST_CW command in production and measuring the center frequency of the generated CW tone.  A couple samples have measured at 250ppm error, ie. when we command 2440MHz we measure 2440.304MHz.  There may be some measurement error occurring, but I was wanting to know the actual limits that would be acceptable to get the nominal wireless performance out of the system.  Couldn't find this in any datasheet.

Thanks,
Arthur