Hi Ok, so what you have is an FEI part that somebody else has messed with. They mounted it on a box and wired this and that to here and there.
Best guess is that the switch on the top of the unit once did this: comp = lock the internal standard to an external standard ( = where it is set now) ext = just use the external standard int = just use the internal standard. Does it still do that? Did the previous owner tinker inside the FEI? Who knows …. If it *is* now set to “lock up to external standard” and you don’t have a proper external standard ( = what it expects to see ) hooked up, it probably will just wander around. Bob > On May 11, 2020, at 9:30 AM, Gordon Batey <[email protected]> wrote: > > Greetings, > > Thanks for the comments. > > Attached ate some pictures of this unit. > > I have not looked inside (yet) The other outputs > appear to have been directly related to the 10 MHZ value. > > I have NOT attempted to adjust anything yet. It has been on > about 6 days mot and reand 10000209.91 down from 10000367.00 > when first turned on. The two red wires come from separate 3 > terminal ?? voltage regulators. So perhaps the oven is open? > > 73 Gordon WA4FJC > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 5 May 2020 12:21:12 -0500 > From: Dana Whitlow <mailto:[email protected]> <[email protected]> > To: Discussion of precise time and frequency measurement > <mailto:[email protected]> <[email protected]> > Subject: Re: [time-nuts] Model # FE2040B > Message-ID: > > <mailto:cadhrwpc3ja2o3eethz5qjowtpp07tte7vc7ynovmfwnadqa...@mail.gmail.com> > <cadhrwpc3ja2o3eethz5qjowtpp07tte7vc7ynovmfwnadqa...@mail.gmail.com> > Content-Type: text/plain; charset="UTF-8" > > Gordon, > > Out of curiosity, what variety of standard is it? > > Dana > > > On Tue, May 5, 2020 at 10:18 AM Gordon Batey <mailto:[email protected]> > <[email protected]> wrote: > > > Greeting to the timekeepers, > > I have just acquired a Frequency Electronics FE2040B Frequency Standard. > It has been off for a long time. It is mounted on a small chassis > with a power supply And BNC connectors. Has outputs labeled 10 Mhz. 5 > Mhz, 1 Mhz and 500Khz. > One BNC is labeled 5 Mhz IN. It is operational and the 10 Mhz is high > but coming down. > It has SMA connectors with short cables going to the BNC outputs. > Some SMA connectors are not connected. > It has been on for about 12 hours now and does not seem to have an oven. > > I am seeking a manual or schematic for this unit. > > Any thoughts appreciated. > > 73 Gordon WA4FJC > [email protected] <mailto:[email protected]> > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > <mailto:[email protected]> To unsubscribe, go > to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. > > > > > ------------------------------ > > Message: 2 > Date: Tue, 5 May 2020 22:00:04 +0000 (UTC) > From: [email protected] <mailto:[email protected]> > To: <mailto:[email protected]> "[email protected]" > <mailto:[email protected]> <[email protected]> > Subject: Re: [time-nuts] Model # FE2040B > Message-ID: <mailto:[email protected]> > <[email protected]> > Content-Type: text/plain; charset=UTF-8 > > Just a thought, and it is just a thought never having come across one of > these before.... > > > > If it doesn't seem to have an oven, does it seem to have any obvious > enclosed oscillator module? > > > > If it's "only" the 10MHz is high, I'm making an assumption here, is it > possible that the 5MHz input is used to condition a 10MHz oscillator > > that's taking time to settle, whilst the other outputs are taken either > directly from the 5MHz input or divided down from it? > > > > Nigel GM8PZR > > > > Greeting to the timekeepers, > > I have just acquired a Frequency Electronics FE2040B Frequency Standard. > It has been off for a long time. It is mounted on a small chassis with a > power supply > And BNC connectors. Has outputs labeled 10 Mhz. 5 Mhz, 1 Mhz and 500Khz. > One BNC is labeled 5 Mhz IN. It is operational and the 10 Mhz is high but > coming down. > It has SMA connectors with short cables going to the BNC outputs. Some > SMA connectors are not connected. > It has been on for about 12 hours now and does not seem to have an oven. > > I am seeking a manual or schematic for this unit. > > Any thoughts appreciated. > > 73 Gordon WA4FJC > gpbatey at wildblue.net > > ------------------------------ > > > > <top2-640x480.jpg><side-640x480.jpg><terminal1-480x640.jpg>_______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
