I have a general question about the RF frequency tolerance of Nordic devices in general. Is the following calculation correct?
- Crystal spec = 16MHz, +/-50ppm tolerance, +/-30ppm stability.
- RF Carrier Frequency set for 2457MHz.
The PLL will multiply/divide the 16MHz by a factor of 153.5625 to achieve the 2457MHz output.
2457MHz * 80ppm (50ppm + 30ppm) = 196.56Khz.
So over temperature the 2457MHz carrier will be off by a maximum of +/-196.56KHz, plus any PLL errors?
Is my thinking correct?