Hi The control range should be +/- 5V if I remember correctly. If it’s not, the only other standard would be 0-5V. There is zero logic in running a wider swing mod to an OCXO at a lower EFC range.
It indeed sounds like the DAC has trouble. Bob > On Mar 6, 2018, at 1:24 AM, Mark Sims <hol...@hotmail.com> wrote: > > I'm not sure what the Z3801A uses for EFC range. Heather uses the EFC > relative command to report the EFC setting. That command reports values from > -100% to 100%. There is a command that reports the DAC input in counts, but > nothing documented that shows volts/count. > > Since the DAC is at -2V with a 99+% DAC setting, it looks like the DAC > circuit has issues, or power supply problems. I think the DAC circuit is a > 16 bit DAC with 4 more bits of resolution created by dithering the DAC inputs. > _______________________________________________ > time-nuts mailing list -- email@example.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- firstname.lastname@example.org To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.