AD9102 Output Signal

1. I've attached an example where I used the DDS MSB enable as part of generating a chirp waveform with AD9106. The SRAM contains a list of DDS tuming words. The result (included) is one sinewave cycle at each DDS frequency.

2. For SAW tooth waveforms you can only adjust teh number of samples per step.

I hope thuis helps.

Thanks,

Larry

1. I've attached an example where I used the DDS MSB enable as part of generating a chirp waveform with AD9106. The SRAM contains a list of DDS tuming words. The result (included) is one sinewave cycle at each DDS frequency.

2. For SAW tooth waveforms you can only adjust teh number of samples per step.

I hope thuis helps.

Thanks,

Larry

Hi Larry,

I have the same problem. Trying to generate a Triangle wave with 78,125 KHz, 156,25 KHz, 312,5 KHz, 625 KHz, 1250 KHz, but I could not find any thing about the frequency for Triangle or Sawtooth wave.

I use the  example2_4096_ramp.txt and example4.regval file, then I have changed:

the WAVE_SEL1 0x027[5:4] to 1

the SAW_STEP1 0x037[7:2] to 4.

So I have no idea how to change the frequency. 

Actually, for the sin wave, I could easily change the frequency, by changing the DDS frequency in the DAC1 tab.

but for the Triangle wave, is vague.