Re: [time-nuts] LeoNTP PPS output to PC DB9 input

I don’t have one of these but I wouldn’t connect anything to anything without knowing the specs. I went to their site but could not find any specs on the outputs on the BNC connector. I should mail them at ord...@uputronics.com for the details. It could be a simple BNC to DB9 soldering job.

Re: [time-nuts] imprecise but adequate time

> Le 28 mai 2019 à 16:38, Eric Scace a écrit : > > Hi fellow time nuts — > > I’m looking for a sanity check or alternative suggestions for the problem > and tentative solution described below. You have a situation where the application in any one system is unaware of the validity of the

Re: [time-nuts] Updating the unit of,time: the second.

> Le 27 mai 2019 à 11:13, Dave B via time-nuts a > écrit : > > Hi. > > This from the recent ShortWave Radiogram broadcast, may be of interest. > > ~ ~ ~ > > (Snipped stuff about other SI units undergoing a revamp...) > > Scientists now have their sights set on updating the unit of > time:

[time-nuts] GPS rollover repair???

Hi, Yesterday, pre-rollover, I reported that my Emap nav device had rolled over once: "I checked my Garmin Emap, 1999 vintage IIRC. That is telling me that it is 20/05/2014. " I left it out over the rollover this morning and surprise surprise the date has switched back to the correct date.

Re: [time-nuts] GPS 50 bps recording today

Ok. I have a bin file recording going via winoncore12 of the Raw data from an M12 . I hope that it is OK. Mike > Le 6 avr. 2019 à 21:14, Tom Van Baak a écrit : > > Would someone be a hero and record the raw subframe data from GPS today? It's > only 50 bits per second (that's about 8

Re: [time-nuts] GPS week rollover

> Le 6 avr. 2019 à 17:53, jimlux a écrit : > > On 4/6/19 12:53 AM, Mike Cook wrote: >> The OP doesn’t state where he got the « quote » from, but IMHO it is wrong. >> As I understand it. >> The GPS epoch started at 0h 1st June 1980 > > 6 Jan 1980 00:00:0

Re: [time-nuts] GPS week rollover

The OP doesn’t state where he got the « quote » from, but IMHO it is wrong. As I understand it. The GPS epoch started at 0h 1st June 1980 and the week number roles at 1024 week intervals at 0h GPS time. When a leap second is added its as if the clock stops for a second so GPS time will be in

Re: [time-nuts] GPS week rollover

I checked my Garmin Emap, 1999 vintage IIRC. That is telling me that it is 20/05/2014. I found this for Trimble which shows a number of devices affected by this which are commonly used bt timenuts. Have a nice day

Re: [time-nuts] GPS week rollover

Hi, I just got a heads up fro TomTom, saying my Go Live 825 bought 2012 « may » have WNRO problems after the April 6 rollover and invited me to update the firmware. I wouldn’t think it would affect the navigation, but it might brick the device. Unfortunately I can’t test it as it went to

Re: [time-nuts] Frequency Ensemble

> Le 17 mars 2019 à 02:16, Anton Moehammad via time-nuts > a écrit : > > Hi Everyone,I like to know if it possible to run let say 10 GPSDO, 16 Rb > clock together and take the average to control 1 "master clock" and have > better stability ?like what BIPM or NIST doing. I think the answer

Re: [time-nuts] Bricked Garmin GPS 18x LVC

Hi, I don’t know if you saw, but on the same page it is mentioned that it may un-brick itself after being left powered off for a long time - weeks. Hope you get it back. > Le 23 févr. 2019 à 09:41, Anthony Dunne a écrit : > > Hi everyone > > I am hoping someone will have some information

Re: [time-nuts] GN-GGB0710 GPS Antenna Mounting Thread

The doc from a Chinese site says （Mounting Method） 5/8-11 Threaded installation > Le 14 févr. 2019 à 21:09, Skip Withrow a écrit : > > Hello Time-Nuts, > As I have been playing with some dual-band GPS receivers, I decided to > order a dual-band antenna to replace my permanent L1

Re: [time-nuts] Ublox F9P multi-band GPS receiver

So the ultimate question is: Do you need a F9P in order to find the precise position of your F9T Antenna so that you can set up the F9T or is the F9T’s survey mode as accurate ( I doubt it as the doc gives position accuracy 2m ). Come to think of it, do you need three positioning receivers to

Re: [time-nuts] leapseconds, converting between GPS time (week, second) and UTC

AFIK no programming systems professing POSIX compliance implements Leap Seconds. There is however a timezone UTCLeapSeconds will allow this apparently. >> t1.TimeZone = ‘UTCLeapSeconds' Obviously youR TZ data base needs to have it and your Python needs to be at the required level; My test

Re: [time-nuts] Trimble NetRS PPS output

This doesn’t surprise me. Some years back I thought I could get better PPS resolution from a survey grade receiver but was disappointed to find on looking at specs of those available that PPS performance was generally worse than timing receivers, which of couse were much cheaper. It’s a no

Re: [time-nuts] RF isolation requirements for multiple GPS receivers

Hi, I am using Mini-Circuits ZN4PD1-50+. They are about 30dB in the GPS frequency band. I hang 4 receivers each off three of these mixing Motorola, Ublox, Trimble and Navspark and never had an issue. Mike > Le 27 nov. 2018 à 14:44, Dana Whitlow a écrit : > > I want to run about 4

Re: [time-nuts] Adoption of revision of the SI at CGPM #26

Also, looks like Leap Seconds are with us for the forceable future if resolution B is adopted as is. > Le 17 nov. 2018 à 22:13, Poul-Henning Kamp a écrit : > > > In message <2b84b23d-b2b3-d9b6-d312-2585248cf...@rubidium.dyndns.org>, Magnus > Danielson writes: > >> The Draft

Re: [time-nuts] 1PPS for the beginner

> Le 14 août 2018 à 09:29, Mike Cook a écrit : > > Sorry about the previous blank mail. Finger jitter. > > > >> Le 14 août 2018 à 04:29, Chris Caudle a écrit : >> >> On Mon, August 13, 2018 9:16 pm, Chris Burford wrote: >>> I have a (generic?)

Re: [time-nuts] 1PPS for the beginner

Sorry about the previous blank mail. Finger jitter. > Le 14 août 2018 à 04:29, Chris Caudle a écrit : > > On Mon, August 13, 2018 9:16 pm, Chris Burford wrote: >> I have a (generic?) GPSDO which contains an Oscilloquartz STAR 4+ OCXO >> that I am using to steer a PRS10 RFS. I'm a little

Re: [time-nuts] 1PPS for the beginner

> Le 14 août 2018 à 04:29, Chris Caudle a écrit : > > On Mon, August 13, 2018 9:16 pm, Chris Burford wrote: >> I have a (generic?) GPSDO which contains an Oscilloquartz STAR 4+ OCXO >> that I am using to steer a PRS10 RFS. I'm a little confused on where the >> 1PPS is coming from with respect

Re: [time-nuts] NIST

> Le 13 août 2018 à 11:09, Dana Whitlow a écrit : > > Craig, > > The original main reason for WWVB had nothing to do with syncing our > "atomic" > wristwatches and clocks. It was for keeping local frequency standards > honest, for > which continuous coverage throughout the day and night was

Re: [time-nuts] Looking for PZT3904T1G transistors

Newark.com 869 in stock , min 1, must 1 > Le 4 juil. 2018 à 14:25, John Ackermann N8UR a écrit : > > Dear Friends -- > > I need to find 150+ pieces of transistor type PZT3904T1G, SOT223 package > (with heatsink tab), equivalent to Digikey PZT3904T1G0SCT-ND. > > These are used in the