I have gotten a problem with AD9287ABCPZ-100, as follows,
According to the Timing diagram of AD9287 ,when my input clock is 20Mhz, the frequency of dataout should be 80Mhz ,and the bit clock(DCO) should be 80Mhz ,frame clock(FCO) should be 20Mhz .
But in fact ，the frequency of DCO and DCO is right ,but the frequence of dataout is 20Mhz,too. So it makes me confused ,Idont know which question leads to this. SO I need a help.
Thanks for your answer !
this is FCO
this is DCO
this is dataout
The frequency of the output pulse looks consistent with shifting out 1000 0000, though the waveform does not look good. Looking at your "dataout" oscilloscope screen shot again from your previous…