On Fri, Sep 5, 2014 at 3:07 PM, Andrew Rodland <[email protected]> wrote: > 1. Should I try using the analog EFC to zero out the amount of > correction I ask the X72's DDS for? Could reduce jitter in the > timebase, could just add noise. I suppose I can test this one easily > enough.
Update on this: well, it works just fine, and I have a usable driver in my code that integrates the digital correction and pushes it to 0 by adjusting a DAC connected to the X72's EFC. But, reading the X72 manual a little closer it mentions that the analog EFC is "sampled" and has a "resolution" that happens to be identical to the resolution available using the digital commands. So, most likely, this is no C-field adjust at all, but another way of controlling the DDS, provided for LPRO compatibility and analog designs. So there's no possible gain for me in doing indirectly what I can do directly more easily. Andrew _______________________________________________ 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.
