On Tue, Jun 21, 2011 at 10:44 AM, KD0GLS <[email protected]> wrote: > Given a complete DDS chip with a single output channel (e.g. AD9834, AD9835), > why would one device favor a cosine LUT versus a sine LUT?
Are the LUTs really different? Ages ago when I made something like this I used only 90 degrees of the table. That is all you need. The other 270 degrees can be made by flipping or inverting. I assume that what's stored is neither. It is data that needs to be interpeted based on the current quadrant. But the author might choose to call it which ever makes the most sense. -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
