Frequency offset calibration

[Mark_Y]

Hi all:

  How to calibrate Bluetooth frequency deviation, can it be calibrated through the function interface?

Thanks!

[Kaja]

Hi, 

for the nRF52 series you adjust the frequency accuracy by adjusting the load capacitors on the 32 MHz crystal (HFXO).

See chapter 4: RF Performance Test Guidelines

If the carrier is higher then what you set is as: The load capacitors should have a higher value, and lower if the frequency is lower. 

Best regards,
Kaja 

[LongQi]

is this the correct one? https://docs.nordicsemi.com/bundle/nwp_006/resource/nwp_006.pdf

but it did not mention how to tune the load capacitors in the code.