Hi The PPS is fed by a (weak) gate that has a goofy supply arrangement. It will drive a CMOS load, but not a lot else. On some units it only comes on once the Rb locks up.
Bob On Sep 17, 2013, at 7:00 PM, Bob Stewart <[email protected]> wrote: > Hi Nigel, > > All I know is what's on the ebay listing. It's number 270851051022. There > is a tiny RF connector on the top board of the 3 that are stacked inside the > package that correlates with other modded boards I've seen online. It looks > like people generally tap into that. Mine is supposed to have a 1PPS signal > on pin-6, which I do not see. Also, there is a flashing LED inside that is > not synced to 1PPS. I dunno whether that means it's not synced up yet, or > that it is. Funny that it's just blinking, and not a 1PPS heartbeat. > > Bob > > > > >> ________________________________ >> From: "[email protected]" <[email protected]> >> To: [email protected] >> Sent: Tuesday, September 17, 2013 5:46 PM >> Subject: Re: [time-nuts] My FE-5680A Came In Today >> >> >> >> Hi Bob >> >> Do you know what version of the FE5680A you've bought, and where are > you measuring the frequency? >> >> Regards >> >> Nigel >> GM8PZR >> >> In a message dated 17/09/2013 23:22:03 GMT Daylight Time, [email protected] > writes: >> My FE-5680A Rb standard came in today. After the usual inspections etc, I >> fired it up and I have the purple haze. The native output is 8.38860798/9 >> (last digit jitter) as read on my 5335A using my GPSDO as an external >> standard. I've got a ways to go before it's all setup, but this is looking >> good. Does it warmup and change frequency at all, or can I retune it to >> 10MHz and use it as a reference without any further ado? >>> >>> Can someone tell me what type of socket that is where you tap off > the RF? It looks sort of like a uFL connector, but a bit bigger. > I'd rather avoid hacking and soldering on this if I can. >>> >>> Bob - > AE6RV >>> _______________________________________________ >>> time-nuts mailing > list -- [email protected] >>> To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the > instructions there. >> >> > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
