Hi all, We've tried to measure the 1e9/2**48 = 3.55uHz frequency resolution of an AD9912 DDS (clocked at 1GHz SYSCLK), but found that the output corresponds to an FTW with the LSB set to zero. Results around 10MHz output, where we expect a step of 3.55 uHz for each step of the FTW, but instead see a step of 7.1 uHz every second step. https://drive.google.com/file/d/1U5nbg2RSOpVRa8VLOJ6bCWsyihcSBhBZ/view https://drive.google.com/file/d/1c6CoQIWzRoM4y8CLoRLhi7sh2pMCywwo/view
has anyone else worked a lot with the AD9912 and verified the frequency resolution? (I can describe the setup&measurement more in detail, but we believe we know roughly what we are doing and tried this with two different AD9912 boards and two different measurement systems) regards, Anders (this question is cross-posted to the AD forums also) _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.