Murray, Do you have any details on the DDS? How difficult is it to change on the fly if I wanted to?
Is the FE-5680A that you like +15V only? Joe Gray W5JG On Wed, Apr 6, 2011 at 12:34 PM, Murray Greenman <murray.green...@rakon.com> wrote: > Joe, > I have several of the FEI units. You pay more for these, because > (assuming you get the right one) they have a DDS synthesizer included, > which (with suitable modification) allows them to operate from about > 1kHz to 15MHz in 10mHz steps. Some models require +15V and +5V, others > just +15V. My preferred unit is the FE-5680A. I have mine mounted on a > large aluminium plate and powered by a switch-mode computer supply. I > have set the default frequency to 10MHz. > > The LPRO type are fine if you want a simple fixed 10MHz reference, and > are in general cheaper and use less power. > > As for lifetime, they seem to go forever. That said, there's no need to > power them continuously since (in my experience) they are close to their > final frequency 5 minutes from a cold start. Power consumption is higher > than an OCXO, but they really do make a great portable standard. That's > what I'd use (in fact, that's what I do use). > > Murray > > > _______________________________________________ > 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.