Regarding the NTP server another option is to buy a stand alone NTP server that can accept a 1pps and or 10 Mhz input, and feed it the GPS or other reference of your chosing. I picked up a Datum unit from ebay which is currently fed 1pps from a Jackson Labs Fury. It also accepts 10 Mhz as well which it will use in lieu of it's built in VCXO.
I agree with the comments about the Fury being a nice plug and play GPSDO solution. I thought long and hard about going the ebay route and acquring a used HP GPSDO to supplement my Thunderbolt and ended up buying the Fury. That being said the price differnce between the Fury and a typical used Thunderbolt is signficant. I would steer clear of the typical combined NTP, GPS units with TCXO's or VCXO's if you are interested in a using them as a source of a highly accurate 10 Mhz reference signal. The VCXO in my datum NTP server is orders of magnitude less stable than a typical OCXO. Installing a GPS antenna in a location with a clear view of the sky is also helpfull. > > Message: 7 > Date: Fri, 17 Aug 2012 21:35:52 -0500 > From: Bill Dailey <[email protected]> > To: Frank Hughes <[email protected]>, > Discussion of precise time > andfrequency measurement <[email protected]> > Subject: Re: [time-nuts] new member with questions NTP, PRS, > GPS, ocxo > Message-ID: <[email protected]> > Content-Type: text/plain; > charset=us-ascii > > On a budget get a thunderbolt... If you want plug and play > get a Jackson labs Fury. I have my fury hooked up to > small Ubuntu box and have a nice ntp server as well as a > great reference. Also, read, read, and read some > more. > > Doc > KX0O > > Sent from my iPad > > On Aug 17, 2012, at 8:12 PM, Frank Hughes <[email protected]> > wrote: > > > Hi, > > New guy here, seeking Oracular pronouncements for my > time/frequency quest! > > > > I recently acquired an HP 3336B, and subsequently > converted it to a "C" model, > > as all the HAM and related equipment here is 50 ohms. > > > > The 3336 has "Option 004: High stability frequency > reference". > > Operates at about 6Mhz.... > > > > I am trying to decide whether to fix the 3336 ocxo, or > just use the other working > > ocxo in the Agilent E8285A Spectrum Analyzer. > > OR > > It would really be fun to provision some type of > Primary Reference and accurate 10Mhz source, and distribute > the signal. > > > > I found a bunch of them on ebay, but they are almost > all in China....what is going on here? > > > > Anyone ever had a good buying experience for this type > of equipent from China? > > > > While decending through this particular > worm-hole, I realized that it would be great to have > > my own NTP server via GPS too. > > Found a bunch of GPS receivers w/ Ethernet and NTP > server features, but none w/ ocxo, only vcxo and tcxo. > > Possibly it does not matter if the reference is the > Stratum-1 GPS? > > Not sure what I am looking at here (obviously) > > > > I only know a little about these topics, as where I > work we have an Agilent_5071A, paired with a > > Symmetricom GPS PRS system. > > But as we have moved out of the old TDM and ATM > technologies, we no longer need a Stratum-1 source, > > (and the 5071A has used up all it's Cesium anyway). But > it was fun and I learned many things. > > > > > > So what I am trying to come up with now for home/shack > is: > > - An NTP server for our LAN > > - A very high quality 10Mhz source to distribute to all > the HP and Agilent equipment here. > > > > I have read enough forums to become dizzy, and would be > glad to buy an HP Z3815A, or > > an HP Z3816A or an HP Z3801A or... > > I even found an HP 55300A, but w/o the shelf it is > useless, > > (100 edge connector pinouts to decipher and wire > manually???) > > > > Advice much appreciated! > > 73 > > Frank > > KJ4OLL > > _______________________________________________ > > 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] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > End of time-nuts Digest, Vol 97, Issue 42 > ***************************************** > _______________________________________________ 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.
