Thank Rex and Paul for the replies >From what I understand my RFTG has a GPSDO on oneside that has a crystal oven inside it, and a rubidium source on the other side. The rubidium source takes a signal from the GPSDO side and uses that for longer term stability. But If I am understanding you, Rex, that the rubidium is really not a gps locked oscillator and just a free running device. I will start tearing down the unit to figure out if I can make something more usable out of it. I will make sure to document it and post it somewhere on the web. I read somewhere on this group that there is a way to bypass the 15MHz generating circuit and use the existing hardware amplifier and distribution at 10MHz. I will also be looking into that as well. Rex, you are correct as there is no power supply inside and I have it hooked up to a open frame type switching supply externally.
Paul - I will be setting up my GPS antenna shortly and trying to get it to lock to GPS for a more precise reference. Thanks all -Denver On Fri, Jul 4, 2014 at 9:38 PM, Rex <r...@sonic.net> wrote: > Several years ago there were a number of these showing up pretty cheap on > eBay, so I bought one. As I recall there were a couple of similar versions > with some differences so take this recollection with a grain of salt. > > I did some tracing of the internals on the one I had and found the > rubidium unit had no connection on the tuning pin (C-field) to the board > circuits. So it was free running, only for backup in the system, and not > GPS lockable. I don't remember there being any useful power supply in the > box, so my advice would be to remove the LPRO rubidium and use it directly. > (It does need heat sinking, so maybe some parts of the box mechanicals are > useful.) In my opinion, working out how to use the supporting circuit board > is not worth the effort, unless you really have a need for the 15 MHz they > create. > > You should be able to find documentation for the internal module LPRO > rubidiums on the web. I haven't looked today but KO4BB site probably has it. > > > > On 7/4/2014 1:47 PM, Denver wrote: > >> Hi all, >> >> My name is Denver I am currently a freshman in college and the time bug >> has >> struck me. I recently acquired a Lucent RFTG on ebay to have a time >> standard for my lab(and yes already realize its 15MHz output but may be >> able to change that and or just use the 10MHz test point from the rubidium >> source). I made a power connector for it. Now that I have power applied >> and >> sort of verified its operation I am looking for more info about the >> connectors on the front panel. I have the KO4BB user documentation on it >> but it doesn't mention much about connectors and pinouts. I also have >> already searched the group for other mentions of the RFTG but all I am >> able >> to come up with is some of the newer models the -m and such. Maybe one of >> you could help point me in the right direction or give me some other ideas >> on how to get more use out of this unit. >> >> Thanks in advance >> -Denver >> _______________________________________________ >> 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. > _______________________________________________ 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.