[time-nuts] Bodnar "Precision Frequency Reference (GPS Clock)" AND LeoNTP Networked Time NTP Server Questions
marklgoldberg at gmail.com
Fri May 18 15:26:06 EDT 2018
Leo and I are already discussing it off list and he is trying to duplicate
On Fri, May 18, 2018, 10:08 AM Denny Page <denny at cococafe.com> wrote:
> Have you considered asking Leo? In my experience, he is very helpful.
> > On May 17, 2018, at 19:19, Clay Autery <cautery at montac.com> wrote:
> > Anyone who is using one (or both) of these, and/or folks who have a
> logical opinion:
> > *"GPSDO"* - Once configured, unit can run on an external DC source
> (5-15VDC). I am NOT using it to power the mast mounted timing antenna. I
> don't anticipate leaving unit connected to a computer when not configuring
> UNLESS I can figure out how to grab data from the unit via the USB port for
> > Questions:
> > 1) What are the specs of the DC plug on the back? If I use an external
> supply, I want to eliminate the addition of yet another SMPS/wall wart to
> the clutter.
> > 2) IF you were choosing a voltage to run JUST this unit on
> big/short/twisted/ferited leads, what voltage would you choose (regulating
> down from 13.8VDC or so). Anything above the required minimum will be
> converted to heat in either the unit or at the regulator. Considering this
> uses a TXCO (I think) and not an OXCO or DOXCO, is running it hotter to try
> and achieve a more consistent internal temp worth the tradeoff in
> potentially shortened life of the unit. (Bottom Line: What voltage will
> make it run most accurately/consistently?)
> > *LeoNTP Networked Time NTP Server* - Can be powered via USB or PoE
> according to website. Detailed specs are seriously lacking. Trying to
> wade through how to power it. USB is obviously 5vdc or a bit less.... But
> the PoE could be much higher with an internal regulator(s)
> > - I haven't bought my new switch yet, so I can buy one with PoE
> capability or otherwise inject PoE on the Ethernet cable from the NTP
> Server to the Gbit switch.
> > - All Ethernet cables in my network are CAT-7 STP (shielded twisted
> pair) or better. (Yeah, yeah, I know, wired Ethernet can be noisy, but you
> do the best you can. IF wired Ethernet becomes an issue, I can back up to
> the wireless network.)
> > - Not sure how much I plan to have the unit connected via USB. Beyond
> curiosity data gathering for a while, I'm thinking at some point I want it
> to be disco'd and forgotten. One less potential USB cable radiating or
> needing ferrites.
> > There's more... but this is a good start. Just want to try and get
> parts on the way. Have to build a separate outboard regulator for the
> timing GPS antenna, too.
> > Thanks!
> > --
> > *Clay Autery
> > (318) 518-1389
> > MONTAC Enterprises*
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