the tuning word for the band-pass filter center frequency can be calculated as follows:
f(BPF) =( f(center) *( 2^16-1))/ f(DAC) = Value
DECinHEX(Value) = MSB in 0x1D and LSB in 0x1C.
But this is not true?? When i calculate a Value ex : f(Center)= 450MHz
i found 493D. But intern the AD9789 write another value?
Can anyone tell me how I can calculate the right Value!
i will not use the AD9789 Evalboard, so i must know the right value to program this register?