[time-nuts] Fwd: Fwd: HP5061B Ion Current
https://www.febo.com/pipermail/time-nuts/2017-March/104374.html The -2500 supply is nearly identical to the +3500 supply. We will post some photos on the disassembly process. We also had to disassemble the +3,500 supply because the 200 Meg resistor had gone up in value. It showed only 1,900 V with no load when it should have shown 3,200 V. We replaced the 47 uFd electrolytic with a tantalum as a preventive measure. After we repaired the -2,500 supply we measured the output voltage versus beam current as set by front panel adjustment. Note that about a 10% increase in electron multiplier voltage will double beam current. beam current High Voltage 30 -1,755 20 -1,658 10 -1,507 On our freshly repaired HP5061B, we ran it four hours with no voltage on the ion pump. It maintained lock when voltage was reapplied. Ion current and voltage were unchanged at 76 uA and 2500 V. You apparently can operate for some time with no ion pump. Really good pix on the inside of the 3500V module. So the opening of the can is the typical lots of heat and pry it open approach right? How about a good pix of the 2500 Volt module? Thanks Paul WB8TSL ___ 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] TAPR Oncore M12+ kit
Hi That’s a very good price for what it is !! Bob > On Mar 27, 2017, at 9:31 AM, Gregory Beat wrote: > > The TAPR offering is a "partial kit" from the Synergy's SynPaQ/E product. > Here is that data sheet: > http://www.synergy-gps.com/images/stories/pdf/synpaq%20product%20data%20sheet%20040110.pdf > Blank aluminum end-plates can be fabricated, or purchased from the OEM > supplier. > > w9gb > > Sent from iPad Air > ___ > 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.
Re: [time-nuts] Timelab, GPIB-USB-B in a VM
I don't know how they're done in VMWare, but in VirtualBox, you have to setup the USB configuration for the VM before you start it. You just click the machine, settings, then USB, then add a device, then select from what's available. Which means you have to have it plugged in and enumerated first. Bob From: Bob Bownes To: Discussion of precise time and frequency measurement Sent: Monday, March 27, 2017 8:03 PM Subject: Re: [time-nuts] Timelab, GPIB-USB-B in a VM John, Thanks for the reply. I'm obviously missing something as I can't see the GPIB-USB-B or the ethernet connected GPIB-ENET. It's really as simple as going to aquire->HP5371/5372 and the interfaces should be in the list, correct? Thanks, Bob On Mon, Mar 27, 2017 at 6:42 PM, John Miles wrote: > Try running the 32-bit version (timelab.exe) instead of timelab64.exe, > even if the VM supports 64-bit execution. That can sometimes help with > compatibility. > > -- john, KE5FX > Miles Design LLC > > > -Original Message- > > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob > > Bownes > > Sent: Monday, March 27, 2017 2:49 PM > > To: Discussion of precise time and frequency measurement > > Subject: [time-nuts] Timelab, GPIB-USB-B in a VM > > > > So I'm trying to run timelab in a windows 7 VM with a GPIB-USB-B > interface. > > > > Anyone ever tried such a thing? > > > > The NI explorer sees the interface but nothing else does. > > > > Pointers welcome! > > > > Data on a bunch of oscillators as soon as I get it to work...:) > > > > Thanks, > > Bob > > ___ > > 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/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.
Re: [time-nuts] Single ended or differential input to TDC chip
Hi Eventually you will want multiple inputs to any chip like this. The more I/o the more crosstalk. Properly done, differential inputs will reduce your crosstalk quite a bit. You might as well debug that part of it now. Bob > On Mar 27, 2017, at 9:05 AM, Attila Kinali wrote: > > Hi, > > We (the group I am with and a group at TU Vienna) are currently designing > an ASIC (digital 65nm process) that will contain a TDC part. The TDC will > be a simple delay line TDC design using differential buffers, which we > expect to give us something in the order of 20ps of resolution (hopefully > better, but we will not know until we get post-layout simulation data). > We are loosely following the design CERN came up with for their new TDC > chip[1]. > > > Now, the TDC expects a differential input, but the system gets single-ended > pulses as input (50R coax input, level likely to be CMOS 3.3V, but level not > fixed yet, ie can be freely choosen). I can either convert these single-ended > signals into differential off-chip or on-chip. Unfortunately, I lack knowledge > and experience to judge either approach. The issues I see are: > > * Single-ended input in a chip might lead to shifting ground potential > on the chip and thus to measurment jitter. > * There are different architectures to preform the single-ended to > differential > conversion on-chip, but I have no clue which one to choose or even how > to judge them without extensive simulations for which we do not have the > time, know-how and probably not even the tools. > * Conversion to differential off-chip means another component off-chip > that might introduce additional delay uncertainty (our application is > very sensitive to that) and an unknown amount of jitter. > > My google foo has been so far not strong enough to find answers to these > questions. > > I would appreciate if someone could give me some hints in this matter > or tell me where I could find appropriate literature and maybe even > tell me whether I am missing anything. > > Thanks in advance > > Attila Kinali > > [1] > https://indico.cern.ch/event/228972/contributions/1539621/attachments/378552/526492/TDC_TWEPP_2013.pdf > > -- > It is upon moral qualities that a society is ultimately founded. All > the prosperity and technological sophistication in the world is of no > use without that foundation. > -- Miss Matheson, The Diamond Age, Neil Stephenson > ___ > 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.
Re: [time-nuts] Single ended or differential input to TDC chip
Hi, Attila! Somewhere you'll have to produce sharp differential edges and this semi-analogue stuff is probably hard on a chip shared with thousands of other gates and a digital process. Going differentially into the chip will reduce the effects of ground bounce etc a lot. This is what you can expect from an ADCMP580 on a homebrew board and soldered-in semi rigid cable: < https://www.flickr.com/photos/137684711@N07/33305853110/in/album-72157662535945536/ > Some will cry: eeek - a comparator, and an ECL or CML one at that, but in the end it is just a differential amplifier like that Wenzel design, made by people who know their SiGe process. If you have a slowly rising source, you'll need multi-stage slope amplification and low pass filtering in Collins style anyway which will be safer to do off-chip. If you can specify the interface, go for something speedy, then the guys who do the the signal source have the hard time and can be pointed at. :-)) regards, Gerhard Am 27.03.2017 um 18:05 schrieb Attila Kinali: Hi, We (the group I am with and a group at TU Vienna) are currently designing an ASIC (digital 65nm process) that will contain a TDC part. The TDC will be a simple delay line TDC design using differential buffers, which we expect to give us something in the order of 20ps of resolution (hopefully better, but we will not know until we get post-layout simulation data). We are loosely following the design CERN came up with for their new TDC chip[1]. Now, the TDC expects a differential input, but the system gets single-ended pulses as input (50R coax input, level likely to be CMOS 3.3V, but level not fixed yet, ie can be freely choosen). I can either convert these single-ended signals into differential off-chip or on-chip. Unfortunately, I lack knowledge and experience to judge either approach. The issues I see are: * Single-ended input in a chip might lead to shifting ground potential on the chip and thus to measurment jitter. * There are different architectures to preform the single-ended to differential conversion on-chip, but I have no clue which one to choose or even how to judge them without extensive simulations for which we do not have the time, know-how and probably not even the tools. * Conversion to differential off-chip means another component off-chip that might introduce additional delay uncertainty (our application is very sensitive to that) and an unknown amount of jitter. My google foo has been so far not strong enough to find answers to these questions. I would appreciate if someone could give me some hints in this matter or tell me where I could find appropriate literature and maybe even tell me whether I am missing anything. Thanks in advance Attila Kinali [1] https://indico.cern.ch/event/228972/contributions/1539621/attachments/378552/526492/TDC_TWEPP_2013.pdf ___ 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] Timelab, GPIB-USB-B in a VM
John, Thanks for the reply. I'm obviously missing something as I can't see the GPIB-USB-B or the ethernet connected GPIB-ENET. It's really as simple as going to aquire->HP5371/5372 and the interfaces should be in the list, correct? Thanks, Bob On Mon, Mar 27, 2017 at 6:42 PM, John Miles wrote: > Try running the 32-bit version (timelab.exe) instead of timelab64.exe, > even if the VM supports 64-bit execution. That can sometimes help with > compatibility. > > -- john, KE5FX > Miles Design LLC > > > -Original Message- > > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob > > Bownes > > Sent: Monday, March 27, 2017 2:49 PM > > To: Discussion of precise time and frequency measurement > > Subject: [time-nuts] Timelab, GPIB-USB-B in a VM > > > > So I'm trying to run timelab in a windows 7 VM with a GPIB-USB-B > interface. > > > > Anyone ever tried such a thing? > > > > The NI explorer sees the interface but nothing else does. > > > > Pointers welcome! > > > > Data on a bunch of oscillators as soon as I get it to work...:) > > > > Thanks, > > Bob > > ___ > > 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/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Timelab, GPIB-USB-B in a VM
On Mon, Mar 27, 2017 at 2:48 PM, Bob Bownes wrote: > So I'm trying to run timelab in a windows 7 VM with a GPIB-USB-B interface. > > Anyone ever tried such a thing? > > The NI explorer sees the interface but nothing else does. > > Pointers welcome! I believe you have to configure the Virtual Machine hosting software to allow USB passthrough to the host OS. I cam across this recently in a Youtube video (https://www.youtube.com/watch?v=xJ0Mfuj0KUQ) which was getting an ADF4351 board's Windows software working under Linux - unfortunately I don't have a stream pointer as to how far in it was but I think it was towards the early-middle > > Data on a bunch of oscillators as soon as I get it to work...:) > > Thanks, > Bob Cheers, Tim ___ 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] Timelab, GPIB-USB-B in a VM
Try running the 32-bit version (timelab.exe) instead of timelab64.exe, even if the VM supports 64-bit execution. That can sometimes help with compatibility. -- john, KE5FX Miles Design LLC > -Original Message- > From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob > Bownes > Sent: Monday, March 27, 2017 2:49 PM > To: Discussion of precise time and frequency measurement > Subject: [time-nuts] Timelab, GPIB-USB-B in a VM > > So I'm trying to run timelab in a windows 7 VM with a GPIB-USB-B interface. > > Anyone ever tried such a thing? > > The NI explorer sees the interface but nothing else does. > > Pointers welcome! > > Data on a bunch of oscillators as soon as I get it to work...:) > > Thanks, > Bob > ___ > 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] Timelab, GPIB-USB-B in a VM
So I'm trying to run timelab in a windows 7 VM with a GPIB-USB-B interface. Anyone ever tried such a thing? The NI explorer sees the interface but nothing else does. Pointers welcome! Data on a bunch of oscillators as soon as I get it to work...:) Thanks, Bob ___ 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] Single ended or differential input to TDC chip
Hi, On 03/27/2017 06:05 PM, Attila Kinali wrote: Hi, We (the group I am with and a group at TU Vienna) are currently designing an ASIC (digital 65nm process) that will contain a TDC part. The TDC will be a simple delay line TDC design using differential buffers, which we expect to give us something in the order of 20ps of resolution (hopefully better, but we will not know until we get post-layout simulation data). We are loosely following the design CERN came up with for their new TDC chip[1]. Now, the TDC expects a differential input, but the system gets single-ended pulses as input (50R coax input, level likely to be CMOS 3.3V, but level not fixed yet, ie can be freely choosen). I can either convert these single-ended signals into differential off-chip or on-chip. Unfortunately, I lack knowledge and experience to judge either approach. The issues I see are: * Single-ended input in a chip might lead to shifting ground potential on the chip and thus to measurment jitter. * There are different architectures to preform the single-ended to differential conversion on-chip, but I have no clue which one to choose or even how to judge them without extensive simulations for which we do not have the time, know-how and probably not even the tools. * Conversion to differential off-chip means another component off-chip that might introduce additional delay uncertainty (our application is very sensitive to that) and an unknown amount of jitter. My google foo has been so far not strong enough to find answers to these questions. I would appreciate if someone could give me some hints in this matter or tell me where I could find appropriate literature and maybe even tell me whether I am missing anything. There is benefit of going diffrential over the chip border, and there is plenty of examples where it has been used for great benefit. Make sure to keep ground attached to neighbor pins/balls. When we run 10 Gb/s with low jitter (7 ps RMS max), then we need and use differential signals. Single-mode to differential mode conversion can be done off-chip if needed, and it may suffice with very simple setups, allowing for passive components. What you might want to look at iis if you have a good CMRR of your differential input or if you should have a inputstage to get better margin. Cheers, Magnus ___ 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] Single ended or differential input to TDC chip
In message <20170327180513.307125ed395c80e4e6490...@kinali.ch>, Attila Kinali w rites: >Now, the TDC expects a differential input, but the system gets single-ended >pulses as input (50R coax input, level likely to be CMOS 3.3V, but level not >fixed yet, ie can be freely choosen). I can either convert these single-ended >signals into differential off-chip or on-chip. Unfortunately, I lack knowledge >and experience to judge either approach. The issues I see are: I would give the chip differential inputs, because that way it can also be used, without loss of performance, on future differential signals. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ 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] Restoring HP 3048A software: converting TDO files
Adrian, Thanks for the links to the links to software. I'm posting this in the hopes someone might find it useful either here, or for anyone who googles looking at how to deal with TELEDISK TDO format archives. I likewise have components of the 3048A Phase Noise Measurement system that I am restoring. The archives of this group are great. The HP site is really a terrific resource. Those TDO archives are pesky though. I was searching for the HPIB.SYS MS/DOS driver for the HP 82355A ISA card. Here is the link: http://www.hpmuseum.net/display_item.php?hw=879 and under software: http://www.hpmuseum.net/display_item.php?sw=57 which leads us to HPIBTOOL.TDO Here is how to use it: I created a very small VirtualBox client that I name "DOS" with 1 CPU held to 10%, 4mb RAM, 10Mb disk of type "Windows 98". All acceleration turned off. I then installed DOS 6.22 by mounting the *.img files as floppies (it comes as a 3 floppy set). I then created another floppy using the command: $ dd if=/dev/zero of=myfloppy.img bs=1024 count=1440 Mounted this in the DOS client and formatted it: C:\> FORMAT A: I then mounted the floppy on my Mac and copies both the HPIBTOOL.TDO file as well as the Teledisk software TELEDISK.EXE obtained from: http://www.classiccmp.org/dunfield/img54306/teledisk.htm mounted this "floppy" in DOS, and then ran TELEDISK.EXE to extract the TDO file into a second floppy, created the same way as the first. This creates an installation floppy for the HPIB driver. Now only if there were a virtualization tool that allowed us to attach one of the USB<->GPIB converters *as if* they were an 82355A ... oh well In any case this is a general way to extract a TDO archive to a "floppy" .img in the comfort of your laptop while sipping espresso. Jonathan ___ 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] Single ended or differential input to TDC chip
Attila Differential inputs, either LVDS or PECL compatible, together with a fast single supply comparator for the CMOS to PECL to LVDS/differential PECL would be the conservative approach. Ultra fast comparators with aaa delay belo 2ns are readilyy available. Alternatively a CMOS to LVDS converter like: http://www.analog.com/media/en/technical-documentation/data-sheets/ADN4661.pdf could be used. There are commercial TDCs that claim similar resolution that use CMOS inputs. One could provide both CMOS and differential inputs so that if the CMOS inputs prove problematic one could just use the differential inputs. Bruce > > On 28 March 2017 at 05:05 Attila Kinali wrote: > > Hi, > > We (the group I am with and a group at TU Vienna) are currently designing > an ASIC (digital 65nm process) that will contain a TDC part. The TDC will > be a simple delay line TDC design using differential buffers, which we > expect to give us something in the order of 20ps of resolution (hopefully > better, but we will not know until we get post-layout simulation data). > We are loosely following the design CERN came up with for their new TDC > chip[1]. > > Now, the TDC expects a differential input, but the system gets > single-ended > pulses as input (50R coax input, level likely to be CMOS 3.3V, but level > not > fixed yet, ie can be freely choosen). I can either convert these > single-ended > signals into differential off-chip or on-chip. Unfortunately, I lack > knowledge > and experience to judge either approach. The issues I see are: > > * Single-ended input in a chip might lead to shifting ground potential > on the chip and thus to measurment jitter. > * There are different architectures to preform the single-ended to > differential > conversion on-chip, but I have no clue which one to choose or even > how > to judge them without extensive simulations for which we do not > have the > time, know-how and probably not even the tools. > * Conversion to differential off-chip means another component off-chip > that might introduce additional delay uncertainty (our application > is > very sensitive to that) and an unknown amount of jitter. > > My google foo has been so far not strong enough to find answers to these > questions. > > I would appreciate if someone could give me some hints in this matter > or tell me where I could find appropriate literature and maybe even > tell me whether I am missing anything. > > Thanks in advance > > Attila Kinali > > [1] > https://indico.cern.ch/event/228972/contributions/1539621/attachments/378552/526492/TDC_TWEPP_2013.pdf > -- > It is upon moral qualities that a society is ultimately founded. All > the prosperity and technological sophistication in the world is of no > use without that foundation. > -- Miss Matheson, The Diamond Age, Neil Stephenson > > ___ > 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.
Re: [time-nuts] TAPR Oncore M12+ kit
The TAPR offering is a "partial kit" from the Synergy's SynPaQ/E product. Here is that data sheet: http://www.synergy-gps.com/images/stories/pdf/synpaq%20product%20data%20sheet%20040110.pdf Blank aluminum end-plates can be fabricated, or purchased from the OEM supplier. w9gb Sent from iPad Air ___ 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] Smart Phone time display accuracy...? (shouldbe q931)
I believe some of the cell phone protocols actually provide time to the phone as part of the authentication process. ___ 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] Single ended or differential input to TDC chip
Hi, We (the group I am with and a group at TU Vienna) are currently designing an ASIC (digital 65nm process) that will contain a TDC part. The TDC will be a simple delay line TDC design using differential buffers, which we expect to give us something in the order of 20ps of resolution (hopefully better, but we will not know until we get post-layout simulation data). We are loosely following the design CERN came up with for their new TDC chip[1]. Now, the TDC expects a differential input, but the system gets single-ended pulses as input (50R coax input, level likely to be CMOS 3.3V, but level not fixed yet, ie can be freely choosen). I can either convert these single-ended signals into differential off-chip or on-chip. Unfortunately, I lack knowledge and experience to judge either approach. The issues I see are: * Single-ended input in a chip might lead to shifting ground potential on the chip and thus to measurment jitter. * There are different architectures to preform the single-ended to differential conversion on-chip, but I have no clue which one to choose or even how to judge them without extensive simulations for which we do not have the time, know-how and probably not even the tools. * Conversion to differential off-chip means another component off-chip that might introduce additional delay uncertainty (our application is very sensitive to that) and an unknown amount of jitter. My google foo has been so far not strong enough to find answers to these questions. I would appreciate if someone could give me some hints in this matter or tell me where I could find appropriate literature and maybe even tell me whether I am missing anything. Thanks in advance Attila Kinali [1] https://indico.cern.ch/event/228972/contributions/1539621/attachments/378552/526492/TDC_TWEPP_2013.pdf -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Stephenson ___ 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] Smart Phone time display accuracy...?
On Sun, 26 Mar 2017 16:29:10 +0100 shouldbe q931 wrote: > Not all phone networks provide time, I was quite surprised in the 90s > when I crossed the English channel going to France and the time on my > (GSM) phone automatically updated, and just as disappointed when I > returned and the clock did not update, this was of course long before > "smartphones" with GPS or NTP clients... Ok.. to get this back on a bit more time-nutty things: Modern cell phone protocols either require or contain provisions to diseminate local (and UTC) time to the cellphones. This is also being used as a timing standard for situations where LF stations (WWVB/DCF/..) are not good enough, but no GPS antenna can be used for whatever reason. I most civilized countries this timing code will be quite accurate, down to the µs level. But there are a lot countries where you cannot expect the time code to be anywhere close to reality. E.g. Networks in India are known for transmitting time codes that are multiple minutes off and nobody cares about correcting that. Attila Kinali -- It is upon moral qualities that a society is ultimately founded. All the prosperity and technological sophistication in the world is of no use without that foundation. -- Miss Matheson, The Diamond Age, Neil Stephenson ___ 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] TAPR Oncore M12+ kit
M12+ or M12+T? There are two different versions of firmware, same hardware. The M12+ does NMEA and Moto bin, the +T does Moto Bin only. Norm n3ykf On Mon, Mar 27, 2017 at 9:17 AM, Majdi S. Abbas wrote: > TAPR has announced a new kit that may be of some interest here: > > https://www.tapr.org/gps_exp-kit.html > > It's certainly well worth the $30. > > --msa > ___ > 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] TAPR Oncore M12+ kit
TAPR has announced a new kit that may be of some interest here: https://www.tapr.org/gps_exp-kit.html It's certainly well worth the $30. --msa ___ 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.
