Re: [time-nuts] Bodnar "Precision Frequency Reference (GPS Clock)" AND LeoNTP Networked Time NTP Server Questions

Leo and I are already discussing it off list and he is trying to duplicate my measurements. Regards, Mark On Fri, May 18, 2018, 10:08 AM Denny Page wrote: > Have you considered asking Leo? In my experience, he is very helpful. > > Denny > > > > On May 17, 2018, at 19:19,

Re: [time-nuts] Bodnar "Precision Frequency Reference (GPS Clock)" AND LeoNTP Networked Time NTP Server Questions

Have you considered asking Leo? In my experience, he is very helpful. Denny > On May 17, 2018, at 19:19, Clay Autery 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

Re: [time-nuts] Bodnar "Precision Frequency Reference (GPS Clock)" AND LeoNTP Networked Time NTP Server Questions

On Thu, May 17, 2018 at 7:19 PM, Clay Autery wrote: > Anyone who is using one (or both) of these, and/or folks who have a > logical opinion: > - 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

Re: [time-nuts] Bodnar "Precision Frequency Reference (GPS Clock)" AND LeoNTP Networked Time NTP Server Questions

On 5/18/18 6:09 AM, Clint Jay wrote: Interested to know how much noise would be from USB signalling and how much is " machine noise" from the PC as my understanding of USB signalling is that it's differential so such should be low noise? Every device I've worked with that had a USB interface

Re: [time-nuts] Bodnar "Precision Frequency Reference (GPS Clock)" AND LeoNTP Networked Time NTP Server Questions

A shield will definitely help with differential mode noise (the USB communication signal) but has little effect on common mode noise (the digital stuff coming from other parts of the circuit), a choke is the fix for common mode (if you can't get rid of the noise at the source, or otherwise return

Re: [time-nuts] Bodnar "Precision Frequency Reference (GPS Clock)" AND LeoNTP Networked Time NTP Server Questions

Interested to know how much noise would be from USB signalling and how much is " machine noise" from the PC as my understanding of USB signalling is that it's differential so such should be low noise? I'm also not sure I've ever seen a non screened usb cable? On Fri, 18 May 2018 1:17 pm Dana

Re: [time-nuts] Bodnar "Precision Frequency Reference (GPS Clock)" AND LeoNTP Networked Time NTP Server Questions

Hi, On 05/18/2018 02:16 PM, Dana Whitlow wrote: > Caution, folks, about USB cable radiation. While the intended signals > flowing through the > cable presumably contribute a bit to the overall picture, common-mode > currents on the cable > are the most likely cause of severe radiation problems.

Re: [time-nuts] Bodnar "Precision Frequency Reference (GPS Clock)" AND LeoNTP Networked Time NTP Server Questions

Caution, folks, about USB cable radiation. While the intended signals flowing through the cable presumably contribute a bit to the overall picture, common-mode currents on the cable are the most likely cause of severe radiation problems. These currents arise not merely from intended USB signals,

Re: [time-nuts] Bodnar "Precision Frequency Reference (GPS Clock)" AND LeoNTP Networked Time NTP Server Questions

Anyone who is using one (or both) of these, and/or folks who have a logical opinion: [] 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