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Question for BPSK with AD9954

Question asked by ykpercy on May 28, 2016
Latest reply on Jun 3, 2016 by ykpercy

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 .

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