Re: [time-nuts] Raspberry PI 3 NTP server with GPS time data.

In my own experience, using the PA6H (AdaFruit) with GPSD as an NTP source doesn’t work. By contrast, the PPS using the kernel module PPS timestamp driver works exceptionally well. The issue with gpsd with this module is that the time reported in the NMEA sentences always has 0s for the

[time-nuts] Oncore battery

Can anyone recommend a rechargeable lithium coin cell that is a direct replacement for the ones that come on some Oncore receivers? Something I can order from Mouser or Digikey, if possible. Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com

Re: [time-nuts] RG6 or LMR400 for GPS Antenna (Symmetricom 58532A and T-bolt)

All, So, went digging into my crawlspace just now, and found my RG6 that I thought was Belden. It’s actually Coleman 92003, which isn’t quad shield, but has a spec sheet that actually shows attenuation at 1500Mhz! https://www.platt.com/CutSheets/Coleman%20Cable/92003.pdf Interesting that

[time-nuts] Western Electric O-451A/U double-oven XO

Hi — I have finally retrieved from my parents’ home my original time & frequency standards lab, to which will be added my more recent HP Z3805A. The assembly contains: HP-113BR frequency divider/clock homebrew WWVB receiver & frequency comparator, with its own internal OCXO standard, that

Re: [time-nuts] Raspberry PI 3 NTP server with GPS time data.

Did you see the notice on the adafruit 2324 web page that reads "Does not work with the Pi 3 at this time". OK assume they have fixed the problem... Try using the #20 reference clock. It works with any generic GPS that outputs NMEA sentences and PPS. Set the Flag1 to enable PPS. What you have

Re: [time-nuts] Raspberry PI 3 NTP server with GPS time data.

Jan IS the GPS antenna "outside" with a clear view of the sky say at least down to 20 degrees elevation or is it "inside" the building? Dave On 4/24/2016 2:51 PM, jan hugo prins wrote: Hi, To get a more stable NTP source into our production network I have started exprerimenting with a

[time-nuts] Raspberry PI 3 NTP server with GPS time data.

Hi, To get a more stable NTP source into our production network I have started exprerimenting with a Raspberry PI 3 with a GPS head. GPS data is coming in fine, but the time is jumping around like a wild horse. The result is that the only thing I get out of this experiment so far is a more stable

Re: [time-nuts] [Announce] Simulation software for powerlaw noise and PTP clock synchronization

Hi, On 04/19/2016 07:46 AM, Wolfgang Wallner wrote: Hello Anders, Do you get agreement between PLN time-series and calcluated ADEVs, as per IEEE1139-2008 table B.2 ? Yes, I explicitly cite IEEE1139-2008 table B.2 in my thesis. I will write a more detailed reply with example data later when

Re: [time-nuts] suitable statistics for measurements with gaps

On 4/23/16 6:28 PM, Michael Wouters wrote: The technique used for dealing with gaps is really about handling random gaps in an otherwise uniformly sampled sequence. The idea is that you take your sequence, pad it out with the missing data (tagging those points with a NaN or whatever) and then

[time-nuts] Calculated ADEV does not match expectation

Hello Anders, hello timenuts, This is in reply to the thread "[Announce] Simulation software for powerlaw noise and PTP clock synchronization" [1]. I have changed the mail subject as the discussion has moved quite far from the initial message. [1]

Re: [time-nuts] HP OCXO warmup graphs

Hi The conjecture has always been that all of the 5334B’s with 10544’s were a field swap out. Why would you do such a thing? That’s never been explained. One *might* wonder if the fact that the 5334B sells for about the price of a 10811 and few would notice a (lower value) 10544 is involved

Re: [time-nuts] HP OCXO warmup graphs

csteinm...@yandex.com said: > And, of course, it's still a matter of interpretation. I look at your plot > and say, Yep, it should be mostly sorted in a month. Someone else might > look at it and say, Looks like 3 days to me. Based on your plot, what do > you say? It still has ~1 more PPB

Re: [time-nuts] Agilent Data logger3 info request

Ok Thank you all you, I will try these solutions and I will ask also to Keysight. Luciano www.timeok.it On Sun 24/04/16 00:10 , jimlux wrote: > On 4/23/16 12:15 PM, DaveH wrote: > > .csv (comma seperated values) is a text format, .gif (graphical > interchange > >

Re: [time-nuts] Convert ADEV specs to MDEV?

Hi, Well, there is differences in level, there is tables for it, so while on the large scale they are close, they are not the same. Vernotte have a table of it in one of the PVAR articles for instance. Cheers, Magnus On 04/23/2016 02:15 PM, Bob Camp wrote: Hi The intended purpose of MDEV

Re: [time-nuts] HP OCXO warmup graphs

Hal wrote: I remember seeing comments that were roughly "it takes a month" and that seemed like a long time. This was a convenient opportunity to collect some hard data. And, of course, it's still a matter of interpretation. I look at your plot and say, Yep, it should be mostly sorted in a