In the eval board software for the ADF7021-N, the calculation for AFC seems to not allow the user to specify a XTAL frequency other than the default value (In my case, 12MHz). THis give an error in the calculated AFC.
It seems to work ok for the Non-N version.
Can you please confirm this is an error?
B ) THe datasheet indicated that the ADF7021-N cannot be used with GMSK if you are using a UART . Why the limitation?