BLE4.0 TX frequency

[wiki]

Hello NORDIC

We found that TX frequency error is quite large. Is it able to compensate TX frequency by software ?

[John]

Well, there appears to be trim registers for the radio peripheral that could be used to adjust the TX frequency. Not a game I'd want to be playing though.

[wiki]

really？can you descript it in detail ? Which register can be set in nrf51822 ?

Thanks !