Hi everyone,
I'm using DAC38J84 to generate NRZ signal. However, the waveform I generated doesn't have a flat top/bottom.
Firstly I generated PRBS sequence whose length is 2^7-1, and the bit period as 27ns. I use this PRBS sequence to generate NRZ signal, and the NRZ signal has 10 samples in each bit period. However, the DAC output waveform does not have a flat top/bottom.
I also tried to generate square wave, whose period is 27ns and duty cycle is 50%. But the generated square wave still doesn't have a flat top/bottom.
I used Integrated Logic Analyzer to monitor the data that has been sent into the JESD IP core, and verified that the data is correct. I also generated sinusoid wave and triangular wave, and the output are correct.
Can anyone tell me how to fix this?
Thank you!
Regards,
Tong