I ground one side of the tuning diode and use the 2 to 12 V as the external OCXO for my FRK's along with increasing the time constant. I have not verified it but I think removing the zener Voltage should also improve ADEV. Bert Kehren In a message dated 11/17/2014 8:46:34 P.M. Eastern Standard Time, kb...@n1k.org writes:
Hi The 10811 is a leaded part pc board construction. If you don’t mind tearing it down to pieces, you can make the EFC do just about anything you wish. Bob > On Nov 17, 2014, at 8:32 PM, S. Jackson via time-nuts <time-nuts@febo.com> wrote: > > On the PSTI message fields question, I am checking into it, will get back > soon with an answer. > > On the 10811, that OCXO can typically be mechanically tuned to have a 1.5V > nominal EFC set voltage. The LTE-Lite can drive from 0V to 3.0V EFC, so > that should be more than required on a good (well aged and good thermal > stability) 10811. We have not tried driving a 10811 with it yet though, so can't > say for sure. One requirement is that the OCXO has a positive EFC slope. > > Bye, > Said > > > In a message dated 11/17/2014 16:28:51 Pacific Standard Time, > bill.ric...@verizon.net writes: > > Said, > > Patiently waiting for my 10 mhz unit. What are your ideas on using it to > control a 10811 instead of the built in 10 mhz osc? Will there be enough > control voltage for the 10811? > > Regards, > > Bill Riches > Cape May, NJ > > -----Original Message----- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of S. Jackson > via time-nuts > Sent: Monday, November 17, 2014 6:40 PM > To: j...@jtmiller.com; time-nuts@febo.com > Subject: Re: [time-nuts] LTE Lite Came!! > > Hi Jim, > > thanks for your question. The reason we put that note in there is > two-fold: > > 1) On these 20MHz units the TCXO output in fact can drive 50 Ohms inputs as > we put a strong buffer on the board, but the synthesized RF output and the > 1PPS output cannot drive 50 Ohms. Those two are CMOS 1M Ohms input only. > > Using 50 Ohms impedance on the TCXO output will however heavily tax the > internal power supply and CMOS buffer, and create heating on the board > right next to the TCXO which will affect stability somewhat. So can it be > done? > Yes. Should it be done? That's up to the user to decide. > > 2) On the next batch of 10MHz DIP-14 TCXO units the external TCXO itself > drives the output directly without a buffer. That TCXO is not capable of > driving 50 Ohms inputs, only CMOS 1M Ohms inputs. So a buffer is required > on these 10MHz units if 50 Ohms test equipment is to be used. > > Hope that explains it, > bye, > Said > > > In a message dated 11/17/2014 15:27:21 Pacific Standard Time, > j...@jtmiller.com writes: > > > Hello Said > > > I got a nice surprise in my mail today: LTE-Lite! > > > There was a note with it that said (in effect) none of the outputs are > 50ohm capable. So it looks like I should build up a little board with the > divide by two and incorporate on that a 50ohm capable buffer for clock > transmission to the rest of my system? > > > BTW, you're welcome to answer via Timenuts as I'm sure others will have > the same question. > > > Thanks! > > > Jim AB3CV > > > _______________________________________________ > 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. > > > --- > This email has been checked for viruses by Avast antivirus software. > http://www.avast.com > > > _______________________________________________ > 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. _______________________________________________ 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.