Hi,
It’s not that straight forward as it all depends on your design
I suggest to connect a spectrum analyser to your design and chick the registers with the bits and bytes described in the User manual and translate the bits /byte of 0x1E to the
Eg if register 1E reads 62626262 then since 0x62 is 01100010 in binary form, the coarse gain setting is 0x03, which is equal to
9dB, and the fine setting is 0x02, which is 1dB (total is 10 dB)