There is a problem introduced if you sink too much current off the lock pin. An LED draws enough current to cause the issue, I think to do with not going into lock or PPS output. If I could just remember what the issue is...
Anyway, this guy has it nailed: http://www.ka7oei.com/10_MHz_Rubidium_FE-5680A.html Except, the ones that I have that need a +5V supply are programmable. Go figure.. --marki -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Azelio Boriani Sent: Sunday, 22 September 2013 1:25 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] FE-5680A Loop Lock Indicator If the lock output comes from the micro or a logic port with a maximum output of 3.3 or 5V, a LED connected to it from +15 will be always ON. On Sat, Sep 21, 2013 at 4:55 PM, Bob Stewart <[email protected]> wrote: > The instructions I got with this Rb said that you could hook an LED through a > 5-10K resistor to the +15 supply and get a lock indication. I'm using a 10K > resistor and the LED lights as soon as it's powered up from cold. Is the > loop lock indicator circuit broken or is it just another strange option for > these things? I saw on one site that if you do it this way it prevents lock, > but mine seems to lock OK with or without the voltage. > > > 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.
