Dear Analog Device
I used DDS 's IC to make the BPSK signal in 70 MHz and 5 MHz.
My circuit used :
+ external reference clock : 10 MHz
+ Ref CLK Multiplier : 28x
When i switch logic value of pin 29 of AD9854( pin BPSK) to change Phase Adjust Register 1 to 2,
The Phase of signal out is correct. But the applitude of signal have been changed in the phase switching time .
The detail of circuit design and problem have sent in attach file
PLz let me know the countermeasure to solve this problem
Thanks a lot in advance for suggestions !!