Hi Some numbers:
C field tuning on a Rb like an FRS or an LPRO is about 2 to 6 ppb DDS tuning on the "new" FE's is in the 1 to 10 ppm range (1000x larger) DDS tuning on the "old" FE's was about 10% without mods, much wider with minor tuning. Bob On Feb 13, 2012, at 2:16 PM, Erno Peres <erniepe...@aol.com> wrote: > > Hi Chris, > > thanks for the info. My second problem is that the unit is in locked position > after powering up.... but after about 5-8min the freq goes down slowly about > 9.999.997.3 Hz and the lock ind level is still low..... > Also noticed that during the sweep the max freq is 10.000.004 Hz and the min > freq is 9.999.750 Hz.. > I assume that I have to open up the unit and try to re tune the 10Mhz sweep > osci...... let say from 9.999.900 to 10.000.100 at least. > Any suggestion???? > > Thanks and regards, > Ernie. > > > > > -----Original Message----- > From: Chris Albertson <albertson.ch...@gmail.com> > To: Discussion of precise time and frequency measurement <time-nuts@febo.com> > Sent: Mon, Feb 13, 2012 7:32 pm > Subject: Re: [time-nuts] FE-5680A Question > > >> From the label I can see it requires +5 Volt but no info about the > S232....... > Can I adjust the " C " field from the DB9 connector....???? > On the units that require 5V you can adjust the frequency using rs-232 > ut only within a very small range around 10MHz. Some of the > ocumentation applies to other types of this same model oscillator. > Chris Albertson > edondo Beach, California > _______________________________________________ > ime-nuts mailing list -- time-nuts@febo.com > o unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > nd 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.