Hi John, Thanks for the response. I don't think my unit is the same as that one. The instructions I got did not mention any +5V. Also, this is not a 10MHz unit, it is only a timing unit. The internal frequency is 8.38860798/9 (last digit jitter) MHz.
Bob >________________________________ > From: jmfranke <jmfra...@cox.net> >To: Bob Stewart <b...@evoria.net>; Discussion of precise time and frequency >measurement <time-nuts@febo.com> >Sent: Saturday, September 21, 2013 10:45 AM >Subject: Re: [time-nuts] FE-5680A Loop Lock Indicator > > >Are you applying +5V to pin as well? See: > >http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:fe5680a_faq > > "Within 5 minutes after powering up (apply +15V on DB9 pin 1 and +5V >on pin 4) the unit should indicate lock (pin 3 voltage drops low)." > >John WA4WDL > >-------------------------------------------------- >From: "Bob Stewart" <b...@evoria.net> >Sent: Saturday, September 21, 2013 10:55 AM >To: "Bob Stewart" <b...@evoria.net>; "Discussion of precise time and frequency >measurement" <time-nuts@febo.com> >Subject: [time-nuts] FE-5680A Loop Lock Indicator > >> 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 -- 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.
