[time-nuts] Z3816A repair or purchase

I have a non-working Z3816A. Looking at the unit from the front, on the right-hand side near the front are two status LEDs. One is green, the other red. Is this a fault indication? Not much happening with the the RS-232 either. I am open to suggestions for repair or would also consider purchasing

Re: [time-nuts] NTP apps on Windows question

Only tangentially related, but for keeping a Windows PC synced, I'm rather partial to NetTime. It's a tiny tray app, quite flexible, and otherwise unobtrusive.  It's a freeware app, though donations are accepted http://www.timesynctool.com/ On 9/24/2019 19:44 PM, Tim Shoppa wrote: My

Re: [time-nuts] NTP apps on Windows question

My feeling is that if you do not have competing applications fighting for control of the clock, and your clock time is visibly correct to a second, that your problem is not the system time. Meinberg ntpd by default disables w32time but it may not disable other applications (you mentioned a few of

[time-nuts] Trimble Thunderbolt

I see that a used Trimble Thunderbolt is listed on eBay # 143392114973 . This Trimble GPSDO is one year older (mfg. date), than my current Trimble reference. This 24 Volt model has experienced its 1024 week rollover. Lady Heather corrects this on display. greg Sent from iPad Air

Re: [time-nuts] Am I doing something wrong?

Hi Bill, Thanks for the note! I leave the Trimble Thunderbolt powered up all the time because since the last rollover in April it takes a long time to find the satellites and it doesn't give 10 MHz output until it has found the satellites for the first time, so none of my gear that is fed by

Re: [time-nuts] NTP apps on Windows question

Yes you definitely need to disable and stop windows builtin ntp client. -- Fio Cattaneo Universal AC, can Entropy be reversed? -- "THERE IS AS YET INSUFFICIENT DATA FOR A MEANINGFUL ANSWER." > On Sep 24, 2019, at 14:35, Chris Burford wrote: > > Yes, > > You want to disable Windows Time

Re: [time-nuts] Am I doing something wrong?

How long has unit been powered on? GPS looks ok but osc is not locked, osc error is high at 500K ppt, should be below 50ppt. DAC shows no activity. Give it time (maybe an hour) to see if it goes from 'Power-up' to 'Normal" On Tue, 24 Sep 2019 13:32:18 -0400, Roger Rehr W3SZ wrote: >HI All,

Re: [time-nuts] NTP apps on Windows question

Yes, You want to disable Windows Time service (w32time) if running the client from Meinberg. If you scroll down about 1/3 from the top of this document you will see where it makes mention to disable win32time. Chris On 09/24/19 14:08:12, Chris

Re: [time-nuts] Distributing GPS L1 signal to many GPS devices

Oh, yes.  For "production" GPS (one I actually use in lab), there is ONE and only one GPSDO.  I then distribute the 10MHz.  I have a master distribution amp then from there, I have more dist-amp hanging off. I have a separate rack where I have lots of time related equipment.  This is an

Re: [time-nuts] Distributing GPS L1 signal to many GPS devices

You could minimize problems with accumulated differential delays by *not* daisy chaining- rather arrange the splitters in a hierarchical fashion so that all your outputs have an equal number of splitters in the path. I think your problem is that you started with more than one GPSDO. You need to

Re: [time-nuts] Distributing GPS L1 signal to many GPS devices

Hi There are a number of MiniCircuits passive multiport splitters that show up on eBay at reasonable (< $40) sort of prices. You can get eight port versions with SMA connectors on them fairly quickly. Other connector types or higher port counts may take a bit of shopping and added cost. There

[time-nuts] NTP apps on Windows question

24/09/2019 19:58 I have used Meinberg NTP and also Thinking Man's Dimension 4 as NTP applications on Windows 7 64 bit OS's on 3 PC's. I use them to sync the PC time for WSJT-X WSPR (a low power digital amateur radio mode) which requires an accurate time on the PC's for successful decoding

[time-nuts] Distributing GPS L1 signal to many GPS devices

Currently, I have a symetricom antenna outside that feeds an HP58536A (4 port).  One of the output port daisy chains to another HP58536A's antenna port.  That gives me 7 ports total. Well, I need more.  I can simply daisy chain another one but it doesn't look like an elegant solution.  Besides,

[time-nuts] Am I doing something wrong?

HI All, I am wondering if I have set up my Trimble Thunderbolt wrong. I have corrected for roll-over and everything looks good in Lady Heather but the Thunderbolt stays in Power-up mode according to Lady Heather, and is always "doing fixes" even though I have entered the lat and lon for a

Re: [time-nuts] (newbie alert) hints on tweaking IEEE1588 on embedded systems

I also have an STM32 port of the ptpd code that seems to work reasonably well -- it runs on an STM32F407 board. I'll hack up some code to see what the actual error is -- the ptp master is another board deriving time from GPS and I could add another gps to the second board to use as a source of