now I programed ad9954 with RAM, what I want is to use direct switch mode to generate the PSK.
but the output only is the sine signal not PSK modulated signal ,what is the problem ?
and the steps as follow:
1)set CFR1=0xC0 00 00 00 (enable RAM and select RAM output as POW)
2)set CFR2=0x00 00 A4(set VCO 400MHz)
3)set FTW0=70MHz(the output frequence is right)
4)set RSCW0=0x00 00 00 00 00 (start and end address is 0,only for one phase data)
5)set RSCW1=0x00 00 00 40 10 (start and end address is 1,only for one phase data,the start and end address send from MSB to LSB)
6)set PS0=0,PS1=0 and send introduce word 0x0B ,then send 32 bit data for phase 0
7)set PS0=1,PS1=0 and send introduce word 0x0B ,then send 32 bit data for phase 180
*the bit<31:18>of data as the POW
final I change the PS0 with input signal .