Re: [time-nuts] Suggestion for a timing GPS receiver (Trimble / Ublox / other?)
Why not consider a more recent current UBlox module? e.g. the M8T https://www.u-blox.com/en/product/neolea-m8t-series A quick internet search will find several suppliers of ready made boards/modules... On 22/01/2018 15:38, Paride Legovini via time-nuts wrote: > Dear fellow nuts, > > I plan to build a decent GPS/GNSS-based Stratum 1 NTP server, and I'm > looking for a good and possibly affordable timing GPS receiver. > > As far as I can tell there are a few common options. One is the Trimble > Resolution T (or SMT), that should be good and proven. The major > annoyance is converting the 3.3V TTL serial logic-level to RS232, but > should be doable with a MAX3232 and a few capacitors. > > Another option is this UBLOX LEA-5T: > > https://www.ebay.it/itm/291769145465 > > The seller advertises an RS232 output pin, but I'm not sure it's > actually available, and I'd need at least lines, one for the NMEA > strings and one for the 1PPS signal. So, even if a RS232 TX pin is > actually there, it is probably not enough to build a good reference > clock, and I'd still need to convert some TTL levels to RS232... > > Does anybody have experience with this receiver? > How does it compare to the Resolution T/SMT? > > Another option is the Trimble Thunderbolt. This seems to do exactly what > I need, but it costs at least ten times more than the other modules. > Beside coming with a ready to use RS232 port and a nice case, does it > have other advantages? > > Am I overlooking something or missing interesting options? > > Cheers, > > Paride IZ3SUS > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] HP 3048 question: how to export graphs?
How about PrintCapture with a Prologix interface? On 15/10/2017 20:03, Richard (Rick) Karlquist wrote: > I am running an HP 3048 under HTBasic and I > have a nice looking phase noise graph on the > screen. I want to export the graph to the > world outside of RMB. Using the "Hard Copy" or "Plot" > function keys does nothing, probably because > I don't have an HP-IB printer or plotter > connected. (I actually have the extremely > rare HP-IB printer on hand, but I don't want a paper > copy, I want a .bmp or something like that). > > I see that HTBasic has a Win-Print driver, > so I loaded that FWIW. I don't see how to > make the RMB software connect to it. The > HTBasic manual discusses how to print text > using this driver, but I want to print (or > plot) graphics. > > The HTBasic site also shows a Microsoft > supplied HPGL filter that sounds like it > might emulate a pen plotter. The HTBasic > manual says that you can write "PLOTTER IS > ". Maybe that will work. I see > in the existing RMB code the program calls > line 25148 PLOTTER IS CRT and elsewhere > PLOTTER IS HPGL. The 3048 help file says > holding down the shift key while pushing > the Plot button redirects to the HPGL plotter. > Can I simply replace "HPGL" with " > or something? > > Then there are the Result (RESU) files. Does > anyone know how to translate them into > anything readable? > > As a last resort, I am using the keyboard's > "Print Screen" key to copy the screen to the > Windows 7 clipboard. It is then available > to any Windows program. That's clumsy but > better than nothing. > > As a hardware engineer, even this simple software > stuff is above my pay grade. Any help would > be appreciated. > > When I first got the 3048, I tried PN3048. > I realize it can effortlessly export graphs. > According to the author, it does not support > various features that I need (and apparently > never will). So I am stuck in the RMB world. > > Rick N6RK > _______ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Bad TBolt Crashing LH?
pps(sec) osc( ppb) >>> dac(V) temp(C) sats >>> >>> 09:39:47 225605 -8.1407e-008 0.110356 >>> 1.196165 42.3623777 >>> >>> # >>> >>> # 14:39:50.000 UTC 29 Aug 2017 - interval 1 seconds >>> >>> # >>> >>> # towpps(sec) osc( ppb) >>> dac(V) temp(C) sats >>> >>> 14:39:50 225608 -8.08732e-0080.106356 >>> 1.196165 83.500 >>> >>> #! time stamp skipped. t=181406392001.000 last=18140639.000 >>> err:2001 ms >>> >>> >>> >>> Then it goes into 'new receiver mode' and then 'new discipline mode' >>> while >>> 3-7 Sats are visible. This goes on for another few minutes until >>> finally it shows a series of further corruptions, with minor alarms >> ending : >>> #! year error: 60404 >>> >>> #! time stamp skipped. t=1601332636481001.000 >>> last=181406509000.000 >>> err:1601151229972001 ms >>> >>> # >>> >>> # 13:14:41.001 GPS 15 Feb 52756 - interval 1 seconds >>> >>> # >>> >>> # towpps(sec) osc( ppb) >>> dac(V) temp(C) sats >>> >>> 13:14:41 225728 -6.68514e-0080.141315 >>> 1.196117 42.5886695 >>> >>> # >>> >>> # 14:41:58.001 UTC 29 Aug 2017 - interval 1 seconds >>> >>> # >>> >>> # towpps(sec) osc( ppb) >>> dac(V) temp(C) sats >>> >>> 14:41:58 225736 -6.60375e-0080.094983 >>> 1.185647 42.5886690 >>> >>> #! year error: 1814 >>> >>> #! time stamp skipped. t=-6224635078999.000 last=181406518001.000 >>> err:-6406041597000 ms >>> >>> 14:42:01 5898563-1.49314e+006 -0.00 >> 1.196108 >>> 42.2786180 >>> >>> #! new gps status: TRAIM rejected fix: at tow 5898563 >>> >>> #! new discipline state: ?0B?: at tow 5898563 >>> >>> #! new minor alarm state 00E7: OSC age alarm Antenna open Survey >>> started No saved posn LEAP PENDING!: at tow 5898563 >>> >>> ... >>> >>> .. >>> >>> ... >>> >>> 14:43:27 225825 -5.45551e-0080.064319 >>> 1.196070 40.0716255 >>> >>> #! new critical alarm state AC00: : at tow 225825 >>> >>> #! new minor alarm state : OSC age normal Antenna OK Discipline >> OK >>> Normal op mode Saved posn OKEEPROM data OK Almanac OK: at tow >>> 225825 >>> >>> 14:43:27 225825 -5.44649e-0080.071280 >>> 1.196070 44.1315385 >>> >>> #! new critical alarm state B375:ROM:BAD Power:BAD OSC: BAD: at tow >>> 225825 >>> >>> #! year error: 21719 >>> >>> #! year error: 45931 >>> >>> #! year error: 45932 >>> >>> #! year error: 11276 >>> >>> >>> >>> >>> >>> Thanks in advance for any help >>> >>> >>> >>> Jerry NY2KW >>> >>> >>> >>> ___ >>> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >> ___ >> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> >> ___ >> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to >> https://www.febo.com/cgi-bin/m ailman/listinfo/time-nuts and follow >> the instructions there. >> > ___ > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Halcyon OFS
It's a Friday afternoon job! On 19/06/2017 18:26, Clint Jay wrote: > It seems I have a hybrid, on the front panel it's an OFS-1, on the serial > number label it's an OFS-1A and on the PCB it's an OFS-2. > > http://imgur.com/a/brRou > > On 19 June 2017 at 17:40, Ole Stender Nielsen <ols...@mail.tele.dk> wrote: > >> I got a Halcyon OFS-1 a while back, and found it was virtually impossible >> to use here in Denmark, which seems to be located too far away from the >> Allouis (162 kHz) or Droitwich (198 kHz) transmitter sites. One major >> design flaw of the OFS-1 is the digital divider used to divide an analog >> signal. >> You can find more information about an experimental modification to >> increase the robustness and usefulness of the OFS-1 here: >> http://dabbledoo.weebly.com/halcyon-ofs-1.html >> >> Best regards >> Ole >> >> >> >> Den 19-06-2017 kl. 17:15 skrev Clint Jay: >> >>> Mine is somewhat different to that model, the case is the same as the >>> leftmost one but the board is quite different to the middle picture. >>> >>> I'll post some links to pictures of the internals and start drawing out >>> the >>> circuit over the coming few days. >>> >>> >>> >>> >>> On 19 June 2017 at 14:29, paul swed <paulsw...@gmail.com> wrote: >>> >>> Great pix can be found here and absolutely can easily be reverse >>>> engineered. >>>> https://www.vintage-radio.net/forum/showthread.php?t=97999 >>>> Very simple straight forward design. >>>> Regards >>>> Paul >>>> WB8TSL >>>> >>>> On Mon, Jun 19, 2017 at 9:25 AM, paul swed <paulsw...@gmail.com> wrote: >>>> >>>> Hello to the group. I suspect I will never see such a unit in the states. >>>>> Also it wouldn't be useful. >>>>> But that said its sounds as though its a traditional simple receiver >>>>> that >>>>> should be able to be reverse engineered. At least for the signal and >>>>> locking chain. If a micro is involved then things get fuzzy fast. Anyhow >>>>> good luck with you digging in. >>>>> Regards >>>>> Paul >>>>> WB8TSL >>>>> >>>>> On Mon, Jun 19, 2017 at 8:27 AM, Clint Jay <cjaysh...@gmail.com> wrote: >>>>> >>>>> Thank you Stephen, Nigel, I'll take some pictures of the board in my >>>>> OFS-1 >>>>> but it doesn't match any of the pictures I've tracked down so far. >>>>>> Interesting that the board mounted on the rear of the enclosure with >>>>>> the >>>>>> trimmers appears to be Vero or perf board of some description... >>>>>> >>>>>> On 19 June 2017 at 11:54, Stephen Tompsett (G8LYB) < >>>>>> >>>>> step...@tompsett.net> >>>>> wrote: >>>>>> I have a little Halcyon information I managed to find a few years ago >>>>>>> when I acquired a couple of PFS units. It includes a brief document on >>>>>>> OFS alignment. >>>>>>> >>>>>>> I'll mail the documentation to you directly... >>>>>>> >>>>>>> >>>>>>> On 19/06/2017 10:17, Clint Jay wrote: >>>>>>> >>>>>>>> I have been given a Halcyon Electronics OFS1 standard which seems to >>>>>>>> >>>>>>> work, >>>>>>> >>>>>>>> it's a version that has 198KHz and 162KHz selector on the fron and >>>>>>>> >>>>>>> after >>>>>>> a >>>>>>> >>>>>>>> reasonable period of time it displays 'lock' and gives a nicely >>>>>>>> >>>>>>> stable >>>>> 1,10 >>>>>>>> and 10 MHz output on the front panel BNCs, (I know, it should be 1,5 >>>>>>>> >>>>>>> and >>>>>>> 10MHz out, read on) >>>>>>>> Does anyone know of a PDF manual? This version has two KHz crystals >>>>>>>> >>>>>>> inside >>>>>>> >>>>>>>> it and I'd like to see how/if it's been modified so a manual with a >>>>>>>> schematic would be even more useful. >>>>>&
Re: [time-nuts] HP5090A Off Air Standard Receiver
How about building a frequency converter to produce 200KHz; mixing the incoming RF (198KHz) with 2KHz derived from the output of the unit, On 18/06/2017 21:17, GandalfG8--- via time-nuts wrote: > Hi Pete > > That's quite good timing, if you'll pardon the expression:-), as I uploaded > a pdf version of the 5090A manual to mediafire a couple of months ago > > http://www.mediafire.com/file/u0bf1eips89uo3h/HP_5090A_Ops_and_Service.pdf > > I know a few others have considered converting the 5090A to 198KHz but it's > not straightforward and I believe the general consensus has been that it's > not really worth the effort. > > I have a 5090B which I'm hoping to get up and running when it finally > reaches the top of the to do list and my view is that it would be much better > to > leave the original electronics undisturbed and to drive it with a 200 KHz > signal divided down from a from a GPSDO or a rubidium module, although > having one of the latter already running at 800KHz does leave me a bit > biased:-) > > Regards > > Nigel, GM8PZR > > Does anyone happen to have an electronic copy of the user / technical > manual they would share with me?All expenses covered. > This rather unusual unit was produced in the UK in the days or the rather > sensible 200kHz Droitwich transmissions. > Im considering reworking the unit to the newer 198kHz standard. > PeteG4GJL > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Halcyon OFS
I have a little Halcyon information I managed to find a few years ago when I acquired a couple of PFS units. It includes a brief document on OFS alignment. I'll mail the documentation to you directly... On 19/06/2017 10:17, Clint Jay wrote: > I have been given a Halcyon Electronics OFS1 standard which seems to work, > it's a version that has 198KHz and 162KHz selector on the fron and after a > reasonable period of time it displays 'lock' and gives a nicely stable 1,10 > and 10 MHz output on the front panel BNCs, (I know, it should be 1,5 and > 10MHz out, read on) > > Does anyone know of a PDF manual? This version has two KHz crystals inside > it and I'd like to see how/if it's been modified so a manual with a > schematic would be even more useful. > > -- Stephen Tompsett (G8LYB) Tel: 01788 578940 Mob: 07956 855816 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Poor man's oven
Not quite as simple as the PTC, an alternative may be: http://shop.kuhne-electronic.de/kuhne/en/shop/accessoires/crystal-heater/Precision+crystal+heater+40%C2%B0+QH40A/?card=724 No it probably doesn't hold the crystal at it's optimum turn over temperature, but it will keep the temperature of a crystal approximately constant especially on a windswept hilltop. On 05/06/2017 09:35, Ulf Kylenfall via time-nuts wrote: > The Crystal heater clip wasa Murata "Posistor" soldered onto a clipand they > were marketed by Murata. > I once purchased a small amount of theseand used them as "poor man's ovens". > Although not perfect by far, they did theirjob and kept my UHF gear stable. > Murata dropped that product many yearsago and I have not been able to findany > similar product. The Posistors arelisted by eg. Digi-key but they do not > stock them. > Ulf - SM6GXV > > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A good GPS-Receiver with 1PPS output...
How about ebay item 251785217093 ? On 09/05/2017 20:52, Ulf Kylenfall via time-nuts wrote: > > Gentlemen. > I am sure this has been asked before... > I am looking to purchase a GPS receiver modulethat supplies a good/stable > 1PPS outputwith as little (internally) generated jitter as possible. > PCB-style is OK. It is to be usedfor GPS-locking a HP 105B in aseparate box. > Miniaturization not necessary at all. > Can someone suggest a suitable product(eBay ?) > BR > Ulf KylenfallSM6GXV > > > > > > > > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Survey plot as art.
This might be of use/interest for a GPS distribution amplifier: http://huprf.com/huprf/wp-content/uploads/2016/03/DA1-4-Manual-V2_03.pdf On 09/01/2017 23:27, Bob kb8tq wrote: > Hi > > >> On Jan 9, 2017, at 6:06 PM, Jay Grizzard <elfchief-timen...@lupine.org> >> wrote: >> >> Does anyone know of any schematics for amplified GPS splitters floating >> around out there? I looked a while back and couldn't find anything. I use a >> 58536A right now, but it's big and I hate having to have N to SMA cables. >> It would be awesome to be able to roll my own with all the connectors I want >> on it… > The standard design is pretty simple: > > 1) DC bias coupler on the input > 2) Protection on the input > 3) Saw filter on the input (say -3 db) > 4) Fairly normal (Mini Circuits) low noise amp with appropriate gain (say 12 > to 18 db) > 5) two way splitter for the two banks of outputs (-3db) > 6) two way splitter to each output (-3db) > (obviously a 4 output device) > 7) 3 db (to 9 db) pads on each output > 8) DC blocks on all but one output. > 9) DC bias coupler on the one “magic” output. > > Some designs put a second filter after the amp. Some designs use ceramic > filters rather than SAW’s. > Some designs go up to quite a few (like a dozen) outputs. Some have external > power rather than > the bias pickoff / pass thru. > > Bob > >> -j >> >> On 1/9/2017 12:43 PM, Hal Murray wrote: >>> The other is a "real" GPS splitter such as the HP.Symmetricom 58535A or >>> 58536A. They usually have N connectors. They usually include an amplifier >>> so you don't see the 3 dB loss. (They get power from the coax the same way >>> the antenna does.) >>> >> ___ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] 10khz gps board
I believe there are several Ublox modules that may do what you want e.g.
LEA-6T LEA-M8T
But I find the "Precision Frequency Reference (GPS Clock)" a useful tool
for generating GPS locked signals it's programmable over a far wider
range than you require (450Hz-800MHz), but is very simple to program and
use.
http://www.leobodnar.com/shop/index.php?main_page=product_info=107_id=234
On 16/05/2016 07:17, Ilia Platone wrote:
> Can anybody here advice me a gps module breakout board with 10KHz
> output? I read on some web page that there are some jupiter receivers
> that can do this but I can't find any board or receiver with these
> modules.
>
> I need an output in lower decades than 10MHz, for a test project.
> ("cheap" if possible)
> Thanks in advance
> Ilia.
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to
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> and follow the instructions there.
>
--
Stephen Tompsett
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Re: [time-nuts] How to run Lady Heather under Windows10
No problems with Windows 10. * If you are using USB-serial adapters use FTDI based devices and turn off 'Serial Enumeration' in the advanced properties in Device Manger - stops the data being used by Windows as Mouse data. This is also a good idea for Win7 and earlier. * Use a short-cut to run the program e.g. with the device attached to COM7 I use: "C:\Program Files (x86)\Heather\heather.exe" /gb /7 This will also work happily from a command line. On 17/03/2016 13:56, David J Taylor wrote: > NEville > > Thoughts > > 1)Get rid of WIN10 ...and instal WIN7 on the new laptop > > 2) Are you running a USB to COM port adapter? Could be a WIN 10 driver > problem > > 3) as far as I know Windows in any version wont allow SLASH in a file > name. I am not familiar with Lady Heather so I do not understand the use > of "file name" and "send command" in the same sentence in this context? > IS the file name embedded in the command? > > I am so fed up with WIN 10 that I may finally breakdown and go through > the learning curve on LINUX > > Dave > manu...@artekmanuals.com > www.ArtekManuals.com > == > > Dave, > > Agreed on (3). > > I've put together a page of notes on Win-10 here: > > http://www.satsignal.eu/software/Win-10-notes.html > > Yes, there are a few issues, but I've seen nothing major with hardware > or software. You're welcome to ask in case I have seen the same issue. > > Cheers, > David -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Tait reference
The T801 units I have seen in the UK contained a rubidium 10MHz reference (FRS form factor) and a synthesizer that could produce several outputs of a nominal 12,8MHz, but which could be individually offset slightly to allow for precise offsetting of the transmitter frequencies by a few Hz for use in a quasi-synch PMR system. On 11 January 2016 at 11:18, Charles Steinmetz <csteinm...@yandex.com> wrote: > Adrian wrote: > > Are these the references with a rubidium oscillator ? They seem to have >> similar models with OCXOs etc. >> > > Tait is a manufacturer of mobile communications gear in New Zealand. The > T801 was part of a discontinued "quasi-synchronous communications system" > -- a form of simulcasting on the same frequency by transmitters at > different locations, to fill in dead spots. Tait's application was utility > and public service mobile radios (not radio broadcasting, where this scheme > has also been used). Here is Tait's basic description: > > The Tait Quasi-Synchronous Communication System works by broadcasting >> simultaneously from several transmitters on the same frequency. The >> transmitters then operate as a single transmitter giving superior coverage. >> >> A Tait T801 Frequency Referenct Module acurately maintains the frequency >> of the transmitters at each site. >> >> Where required, the T801 allows small frequency offsets to prevent the >> occurrence of static nulls in the overlap area. >> >> The T801 module may be driven from one of a number of frequency >> references, such as: >> -- Rubidium frequency standard >> -- Broadcast frequency standard >> -- Oven Controlled Crystal Oscillators (OCXOs) >> -- GPS Caesium Clock >> > > This suggests that the T801 does not have an internal frequency reference, > but rather requires a precision external reference to function. (It has a > jack labeled "INTERNAL STD OUTPUT," but that may simply be a reference that > is derived from the external standard, or a backup crystal oscillator to > keep the transmitter more or less on frequency if the external reference > signal is lost.) > > Best regards, > > Charles > > > > _______ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PRS10 time to lock
Use the RbMon utility to monitor the unit's operation as it starts up to confirm that the lamp is started and the photocell is detecting a signal. Not long ago there were a number of units available for sale on Ebay that appeared to have a lamp problem. On 23/08/2013 02:10, Paul wrote: As I patiently wait for my PRS10 to lock I'm curious if there's a limit beyond which I should assume the unit is faulty. It does produce abount 10MHz (+- .2 Hz) and the oven current dropped at what I assume is operating temperature. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Stephen Tompsett (G8LYB) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] inch/mm conversion
FYI http://www.npl.co.uk/reference/faqs/on-what-basis-is-one-inch-exactly-equal-to-25.4-mm-has-the-imperial-inch-been-adjusted-to-give-this-exact-fit-and-if-so-when-%28faq-length%29 -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] inch/mm conversion
Something strange happens when copying the URL of the page, sorry. Visit npl.co.uk and use the 'Search NPL' using the terms 'inch mm' On 26/06/2013 11:01, Nic McLean wrote: I get error 404 page not found on that link. Nic VK2KXN -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of Stephen Tompsett Sent: Wednesday, 26 June 2013 6:20 PM To: time-nuts@febo.com Subject: [time-nuts] inch/mm conversion FYI http://www.npl.co.uk/reference/faqs/on-what-basis-is-one-inch-exactly-equal- to-25.4-mm-has-the-imperial-inch-been-adjusted-to-give-this-exact-fit-and-if -so-when-%28faq-length%29 -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Atomic Watch.
http://www.theregister.co.uk/2013/05/01/hoptroff_shows_first_atomic_watch_movement/ -- Stephen Tompsett (G8LYB) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] T-Bolt Mon and Windows 7
I run T-Bolt mon and Lady Heather successfully on Windows-7 64-bit using FDTI USB to serial converters. With the FDTI USB converters you can disable 'Serial Enumerator' in the advanced device properties to stop the port being assumed to be a mouse by Windows. On 21/04/2013 12:19, gandal...@aol.com wrote: Hi Dick I've tried it via a Prolific USB to serial adapter, running as COM4, and as far as I can tell, the answer is yes---ish:-) Both TboltMon version 2.60 and Trimble GPS monitor 1.60, seem to be ok monitoring a Thunderbolt under Win7 Ultimate 32 bit, until Windows pulls its old trick and decides the data is coming from a serial mouse, in this case a serial ballpoint mouse. Disabling the mouse restores operation, and I can once more switch between the two Trimble programs ok, but online comments suggest that a permanent fix for this problem, which has been around for years, seems to be far more elusive under Win7 than with previous versions. Although I'm using a USB to serial converter, as this Win7 laptop has no actual serial ports, previous experience with the WinXP rackmount kit I normally use, where I have fixed it permanently, suggests the problem is just as likely to occur with proper serial ports. Just checked Lady Heather and she's also running fine under Win7 using the same setup. Regards Nigel GM8PZR In a message dated 21/04/2013 03:49:40 GMT Daylight Time, w1...@earthlink.net writes: Will T-Bolt Mon work in Windows 7 ? Thanks, Dick, W1KSZ ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Stephen Tompsett (G8LYB) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port / Mouse issue (was mentioned inThunderbolt Monitor)
A method that does work (for me) on Windows XP and Windows 7 to tame the wild mouse. 1. Use a FTDI USB to serial port converter 2. Disable 'Serial Enumerator' in the advanced device settings properties. I've used both single port adapters based on FT232 chips and 4 port FT4232 devices. N.B. This option does not appear to be available for standard COM ports, or USB to Serial devices from other manufacturers. On 27/01/2013 06:42, David J Taylor wrote: -Original Message- From: Sarah White [] Whatever works for you though I guess. I was just explaining the officially supported method *shrugs* = It seems from Tom's comments that the various fixes don't work for everyone. I count myself lucky that I've not needed any fixes for either my Win-7/64 and my Win-8/64 PCs. Win-7/64 is from a Sure Electronics evaluation board running at the default 9600 baud with several sentences, and Win-8/64 from a Garmin GPS 18x LVC at 38400 baud, emitting just $GPRMC if I recall correctly. I wasn't originally aware of the more recent Microsoft article, not having needed it myself, so thanks for the pointer. I hope the information we both presented will be helpful to someone. Cheers, David -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port / Mouse issue (was mentionedinThunderbolt Monitor)
You've been lucky, or maybe not connected your GPS module until after the system has booted and enumerated all the mice that it thinks are connected. The real problem is that Microsoft by default assumes that if you are a communications device gratuitously sending data then you must be a mouse! At least you will know what the problem is if it does occur. On 27/01/2013 09:17, dlewis6767 wrote: I am interfacing all my various GPS modules (NMEA, TSIP, TEP, UBX, etc...) to my XP machine through a virtual com port Prolific 2303 chipset/drivers (sold all over eBay for about $2.00). The Silicon Labs 2102 chipset works as well. Not sure if this is germane to this thread, ...but I have never seen such a serial port issue you'all are describing. -Don ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Serial port / Mouse issue (was mentioned inThunderbolt Monitor)
Tom, agreed by no means a perfect solution but one that does work well in practice if all you want is the serial communications for a moderate number of connections (I'm currently up to COM25). If you need precision timing then you need an alternative solution to USB. The real underlying problem is that Microsoft assumes that any communications device gratuitously supplying data at boot time, is a mouse, without an easy/reliable method of disabling this behaviour. FTDI devices with their device driver should remember the COM port they have been assigned on an individual system even if they get plugged into a different port/hub, and this greatly reduces reconfiguration effort if you change any USB connections - Other manufacturer's devices have a tendency to use a new COM port number each time they are plugged into a different physical USB port connected to the same computer. If you need a large number of serial connections from a single system, I think you should look at RS232-Ethernet terminal/communications servers. The timing problem will be even worse than a locally connected USB device. On 27/01/2013 12:18, Tom Van Baak wrote: Hi Stephen, Your work-around is one often used. But it's not a clean solution. For example, it is not possible to disable 'Serial Enumerator' until you first know the com port number and have regained control of your bouncing-mouse-crazy machine. This requires that you physically remove the plug in order to use the device manager to hunt down the port in question. This cannot be done remotely. It cannot be done without a human present to pull USB connectors in and out. It cannot be done on a headless or embedded system. It doesn't scale well if there are dozens of USB ports or dozens of machines. In my experience it also doesn't work reliably over months and years worth of crashes and reboots; eventually the system finds a way to reset the PnP configuration and then all the USB ports need the work-around again. What I'm searching for is a clean, robust way to solve the problem. The goal is that an end-user can just plug in a fast talking serial timing gizmo and it just works all the time, every time, especially the first time, without any kind of human intervention. /tvb - Original Message - From: Stephen Tompsett step...@tompsett.net To: time-nuts@febo.com Sent: Sunday, January 27, 2013 1:13 AM Subject: Re: [time-nuts] Serial port / Mouse issue (was mentioned inThunderbolt Monitor) A method that does work (for me) on Windows XP and Windows 7 to tame the wild mouse. 1. Use a FTDI USB to serial port converter 2. Disable 'Serial Enumerator' in the advanced device settings properties. I've used both single port adapters based on FT232 chips and 4 port FT4232 devices. N.B. This option does not appear to be available for standard COM ports, or USB to Serial devices from other manufacturers. On 27/01/2013 06:42, David J Taylor wrote: -Original Message- From: Sarah White [] Whatever works for you though I guess. I was just explaining the officially supported method *shrugs* = It seems from Tom's comments that the various fixes don't work for everyone. I count myself lucky that I've not needed any fixes for either my Win-7/64 and my Win-8/64 PCs. Win-7/64 is from a Sure Electronics evaluation board running at the default 9600 baud with several sentences, and Win-8/64 from a Garmin GPS 18x LVC at 38400 baud, emitting just $GPRMC if I recall correctly. I wasn't originally aware of the more recent Microsoft article, not having needed it myself, so thanks for the pointer. I hope the information we both presented will be helpful to someone. Cheers, David -- Stephen Tompsett -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] OT: UK's atomic clock 'is world's most accurate'
So now following previous historical precedent, we should give it to the Americans, destroy the original and burn the plans... On 26/08/2011 15:20, Rob Kimberley wrote: Come now, it's British, it's got to be better! :-) Rob K -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed Sent: 26 August 2011 3:17 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] OT: UK's atomic clock 'is world's most accurate' Hmmm would seem that its the same as NIST. By the way I have one of those in the garage. Or is it that my garage looks like that? Will say that the BBC tech info/editorial is quite good as compared to the watered down stuff we normally see. Regards Paul. On Fri, Aug 26, 2011 at 5:46 AM, David J Taylor david-tay...@blueyonder.co.uk wrote: From the BBC: UK's atomic clock 'is world's most accurate', see: http://www.bbc.co.uk/news/**science-environment-14657002http://www.bb c.co.uk/news/science-environment-14657002 Cheers, David -- SatSignal software - quality software written to your requirements Web: http://www.satsignal.eu Email: david-tay...@blueyonder.co.uk __**_ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/** mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listin fo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] A Symposium on Time
FYI: An inter-disciplinary forum on the subject of 'Time' University of Warwick, UK 24th August , 2011 http://www2.warwick.ac.uk/fac/cross_fac/ias/earlycareer/events/time/ -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] EFRATOM FRT Manual?
My local radio Society has recently been donated a couple of EFRATOM FRT Rubidium Frequency Standards. They contain a FRK-H Rubidium Module, and both appear to be working. I have the documentation for the Rubidium module, but do not have any circuit details for the support circuitry Does anyone have a manual or any further information about these units? -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Tboltmon Serial Port Selection...??
I followed up a hunch after browsing through the sample code they supply for TBCHAT. John Miles wrote: Thanks! How'd you find that option? -- john, KE5FX -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Stephen Tompsett Sent: Friday, March 28, 2008 1:12 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Tboltmon Serial Port Selection...?? My version of Tboltmon (version 2.60)accepts a command line argument which bypasses the selection menu e.g. TBOLTMON.EXE -c1 This does not appear to be documented. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Tboltmon Serial Port Selection...??
My version of Tboltmon (version 2.60)accepts a command line argument which bypasses the selection menu e.g. TBOLTMON.EXE -c1 This does not appear to be documented. Michael Baker wrote: Hello, All-- Can anyone tell me why, when I click on the Tboltmon icon associated with my Trimble Thunderbolt, that a little Serial Port Selecton window pops up and why does my T-bolt only run after selecting COM-4? Why can't this be selected once and then forgotten about? It seems like an un-necessary step. Thanks!! Mike Baker WA4HFR Micanopy, FL ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Stephen Tompsett ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
