Hi The 405 appears to have some “bandpass” elements in it. You can not tune it over a wide range.
Bob > On Jun 8, 2016, at 3:08 PM, Logan Cummings <logan.cummi...@gmail.com> wrote: > > Hi All, > > Nick's request for a divide-by-three circuit to get his FE-405B to > output a 10MHz signal got me thinking - didn't want to threadjack. > > I had assumed that the FE-405B's DDS output and FE-5680 compatibility > made it a good candidate for output frequency reprogramming. Has anyone > determined that this is not possible? My biggest concern was that if the > internal crystal is also at 10MHz you'd get bad spurs trying to output the > DDS at the same frequency.. > > Does anyone know if the FE-405B uses the original FE-5680 DDS circuit > or the more recent one that is only narrowly (EFC) tunable over the serial > interface? Would be great to have a stable reference at 1, 5, 10, etc. MHz. > > > Any info/references on the FE-XXX internals would be appreciated! > > Thanks, > -Logan > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.