Greetings,
We followed the "Quick Start" section in the manual to set up both boards and were able to observe the NCO frequencies (2140 MHz) with DAC board in on-chip PLL mode.
Now, we would like to have the boards generate a short pulse. Thus I put together another waveform .csv file that contains a single Gaussian wave (see attached + screencap) and uploaded it to HSDC Pro. Since our oscilloscope could only see up to 25 MHz, we set the NCO frequency to somewhere less than 25 MHz. Nevertheless, we are not able to observe the Gaussian pulse from our oscilloscope, but some sort of wavepackets (see image). The number of peaks within the wavepacket positively correlates with the NCO frequency. This is undesired as we were hoping to see the waveform in .csv file appear in our oscilloscope. Pardon my ignorance, but the more knowledgeable members in our group suggested that it's the .csv waveform mixing with the NCO?
single_pulse.csv
and this is what we get
Suspecting that NCO is doing something that we don't want, we turned it off and fed different waveforms and observed the result using the same oscilloscope.
Input:
Output:
Input:
Output:
I am not sure how to proceed. Please advise or request additional information. Most settings should be the same listed in the "Quick Start" section in the manual (except NCO frequency and the wave pattern generation).
Thanks a bunch!
