Re: [time-nuts] US export regulations for TICs
Moin, On 07/07/2015 03:28 PM, Attila Kinali wrote: Moin, As we need a need a proper TIC here to do our research, we are going to buy one from ebay form a seller in the US and let a friend who is in the US at the approriate time and can pick it up to bring it back in the plane. Now the big question is, are there any export regulations regarding such equipment and if yes, where do I find it? (my search didnt show up anything approriate). Yes I know it's a boat anchor and that takeing it in a plane is kind of iffy, but it's better than shipping it. To the best of my knowledge no. It's just that many don't bother to fill in all the forms. There is commercial service to be used for that kind of stuff, and I got one of those myself. At one time I even got a fellow time-nut do the work for me. The benefit of doing that is naturally you have someone competent to fire it up and do basic checks before any expensive shipments. So, what are you getting? 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] New wrist watch
D W watsondani...@gmail.com writes: I had some features I was looking for and settled on a Casio Wave Ceptor. I have a Casio Pathfinder PAW-2000, which syncs to WWVB (and in theory to 5 other reference stations). As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. In ~Boston, mine syncs at night, and I have been unable to get it to manually sync. At a pub in downton Fort Collins at 1700, it synced just fine :-) Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... I would hope that the watch would self-calibrate from the daily syncs, and adjust the free run rate accordingly, but it doesn't seem to. I find that when I travel (to anywhere but near CO) it doesn't sync at night. My watch ends up slow pretty reliably, on the order of about a second per week. I haven't measured it precisely, mostly because I don't have a good way to measure from the display. Perhaps I should use audio from the on-hour chime. On mine, syncing can be turned off, but in most places, I suspect you don't need much of a Faraday cage. pgpsBiJCWDiD0.pgp Description: PGP signature ___ 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] US export regulations for TICs
On 7/7/15 6:28 AM, Attila Kinali wrote: Moin, As we need a need a proper TIC here to do our research, we are going to buy one from ebay form a seller in the US and let a friend who is in the US at the approriate time and can pick it up to bring it back in the plane. Now the big question is, are there any export regulations regarding such equipment and if yes, where do I find it? (my search didnt show up anything approriate). Yes I know it's a boat anchor and that takeing it in a plane is kind of iffy, but it's better than shipping it. Ah, the complexities of Export Controls, with which I deal every other day. I'll summarize a bit here, for the benefit of other list members who might contemplate this. If it's straying too far off the list topics, let me know... Ebay sellers in general don't know anything about export controls, other than some just don't sell to foreigners (which they think neatly solves that problem it doesn't). In export control, there are US Persons and non-US persons. The former are US Citizens and legal permanent residents (green card holders), who are NOT representatives of a foreign entity. You can be a US citizen, but work for, say, Thales-Alenia Space Italia, and be a non-US person. If you are transferring export controlled goods (or information!) to a non-US person, you *may* need an export license, depending on what the goods are. Where the transfer takes place is immaterial (so if your friend going to do the pickup isn't a US person, the export would occur when he or she put their hands on the goods). Now to whether you need a license. There are two kinds of export controls in the US: US Munitions List (ITAR), run by the department of state, and Commerce Control Regulations (CCR) run by the Department of Commerce. USML stuff almost always needs a license, a non-trivial process requiring, typically, an end user certificate describing who the ultimate recipient is (e.g. you can't say I'm buying it for myself, when, really, you're transferring that 17-axis milling machine to a designated country) You can easily google the USML (the version at fas.org is a bit out of date): it's fairly straightforward, and MOST of the stuff will say specially designed for military purposes, so a piece of test equipment that has multiple uses probably won't be controlled, unless it's designed to be bolted into a fighter or ship or carried by an infantry soldier. There are some no conceiveable dual use things on the USML: GPS receivers that work at more than some high altitude or at Mach 5 are a nice example. For USML/ITAR stuff ALL exports need a license. Then, there's the EAR/Commerce rules. For these, which are much broader and cover more commodities and things, there's a which country is it going to distinction. Shipping fast CPUs to the UK, no problem; Shipping to North Korea, can't do it. USML is here https://www.pmddtc.state.gov/regulations_laws/itar.html I would suggest looking at Category 11 (Military Electronics) for which there was a recent amendment: https://www.pmddtc.state.gov/FR/2014/79FR37536.pdf the Export Administration Regulations (EAR) are here https://www.bis.doc.gov/index.php/regulations/export-administration-regulations-ear Chapter 3 might be of interest. It has rules on RF amplifiers, arbitrary waveform generator, signal analyzers, etc. I've never looked for counters or TICs. Thanks in advance Attila Kinali ___ 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] 53230A noise floor
Anders, Beware that there is both lambda and omega filterings on counters to enhance their performance over pi counters, and that this relates to frequency output. However, for propper ADEV and friends you have to be careful. TI-mode is to be used in order to avoid the lambda or omega properties. Enrico Rubiola and Francois Vernotte has made a number of publications on that subject. Cheers, Magnus On 06/24/2015 07:39 PM, Anders Wallin wrote: I finally had time to compare the 53230A CONT (resolution-enhanced, aka lambda-counting) and RCON (undocumented! reciprocal continuous counting, aka pi-counting) modes, and wrote down some notes: http://www.anderswallin.net/2015/06/cont-vs-rcon-mode-on-the-53230a-frequency-counter/ comments on my notes, here or in the blog, are welcome. enjoy! Anders On Tue, Apr 7, 2015 at 9:42 PM, Mod Mix mod...@t-online.de wrote: Ole Petter Ronningen: Tangetially relevant; I made a patch for TimeLab to use the gap-free frequency measurement-mode for the 53230A, if anyone is interested. Thanks for this great support! Ulli ___ 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] New wrist watch
I too have a Wave Ceptor. If you put it in a metal box every night (it tries to sync from 12midnight to 2AM) you may get it to run unlocked from WWVB. Mine gets off by a few seconds every month when it runs unlocked, but is never off by more than a fifth of a second when it locks every night. Tim N3QE On Mon, Jul 6, 2015 at 6:45 PM, D W watsondani...@gmail.com wrote: With my new found interest in time nuttiness I thought I should upgrade to a decently accurate watch. I had some features I was looking for and settled on a Casio Wave Ceptor. My second choice was an Eco Drive, but the Casio had the right mix of features at a good price. As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... Dan ___ 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] New wrist watch
Two data points for one watch: When I bought a Casio PAW-1300, it was about 20 seconds fast. It said that it had last synced on September 24, but that information does not include the year. It was now June 10, so it had been running without a radio sync for at least 9 months (though it could have been 9 months plus 1 year, or plus 2 years...). If we assume the delay is only 9 months for 20 seconds of error, that's a error of about 2.8 seconds/month or about 1 PPM. A year later, the same watch got stored in a drawer where there was no light and poor radio reception. After 26 days without a successful radio sync, it had gained 2 seconds. (On the other hand, the watch does *not* handle a leap second when the leap second actually occurs. It simply keeps counting, so it ended up being 1 second fast after the recent June 30 leap second. It was correct the next morning, after its usual overnight sync to Colorado.) I normally leave the watch on the window ledge of a window approximately facing Colorado (I'm near Toronto). It gets lots of light to keep the battery charged, and reliably syncs every night. It has become my master time source that I sync all my other watches to when adjusting them. (Someday I need to build a time display for one of my GPS receivers, but the Casio works well enough). - Dave On Mon, Jul 6, 2015 at 6:45 PM, D W watsondani...@gmail.com wrote: With my new found interest in time nuttiness I thought I should upgrade to a decently accurate watch. I had some features I was looking for and settled on a Casio Wave Ceptor. My second choice was an Eco Drive, but the Casio had the right mix of features at a good price. As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... Dan ___ 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] US export regulations for TICs
Moin, As we need a need a proper TIC here to do our research, we are going to buy one from ebay form a seller in the US and let a friend who is in the US at the approriate time and can pick it up to bring it back in the plane. Now the big question is, are there any export regulations regarding such equipment and if yes, where do I find it? (my search didnt show up anything approriate). Yes I know it's a boat anchor and that takeing it in a plane is kind of iffy, but it's better than shipping it. Thanks in advance 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] New wrist watch
On Tue, Jul 7, 2015 at 12:45 AM, D W watsondani...@gmail.com wrote: With my new found interest in time nuttiness I thought I should upgrade to a decently accurate watch. I had some features I was looking for and settled on a Casio Wave Ceptor. My second choice was an Eco Drive, but the Casio had the right mix of features at a good price. As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... I have a similar watch (the G-Shock GWM850-1 [1]) and have found it to keep within one second (compared visually to synchronized railway clocks in the UK and Switzerland) after 2 weeks of no signal. For reference, I take off the watch when showering but otherwise wear it continuously so the temperature of the watch is fairly consistent. They're pretty solid watches, though I find it to be a bit finicky when signal is marginal during the day: after locking to the signal it will switch between L1 (the lowest signal strength) and L3 (the highest) with a period of 20-30 seconds, which means it never syncs. At night it's much better, and typically syncs after only two minutes. Still, considering the whole thing fits on one's wrist and runs on a solar-charged battery, it's remarkably advanced and I recommend it. Cheers! -Pete [1] http://www.casio.com/products/Watches/G-Shock/GWM850-1/ -- Pete 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] New wrist watch
I did much the same thing, but settled on the Seiko astron due to the lack of LF time sync in Sydney. GPS for the win and satisfying the closet horologist in me. J On 7 Jul 2015 3:22 pm, D W watsondani...@gmail.com wrote: With my new found interest in time nuttiness I thought I should upgrade to a decently accurate watch. I had some features I was looking for and settled on a Casio Wave Ceptor. My second choice was an Eco Drive, but the Casio had the right mix of features at a good price. As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... Dan ___ 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] beaglebones, time, web services
A small task queue or message queue would serve the purpose of tying the webserver to the other external tasks: 1) Web server queues job; 2) polls via ajax for status or they could run syncronously. Python is not my forte but there are a number that look like they integrate very well with python. A couple that look like they might be suitable from a quick google are huey or celery. John On Tue, Jul 7, 2015 at 6:13 AM, Bob Camp kb...@n1k.org wrote: Hi Having done this on *very* small machines with cgi before, the lag has never been an issue. Yes, the things I do are “tweaks” to variables, or data requests. I do not try to spawn a piece of code to compute PI to 800 places and wait for the result. Bob On Jul 6, 2015, at 10:24 PM, Jim Lux jim...@earthlink.net wrote: On 7/6/15 3:19 PM, Tom Harris wrote: Since you want simple just use a CGI script written in your language of choice. Very easy technology to learn, Python has support libraries out of the box if you want. You have a webpge with carious simple controls on it like buttons etc, you click a special button that posts a request to a URL, the webserver runs a script that generates the response, the webserver serves it out, your browser displays it. Why bother with learning a framework? Messing about with mechanics is far more fun! The only hiccup with the cgi approach (and with directly code the action in the guts of the server like with flask) is that the subprocess that's spawned has to complete before control returns (e.g. to serve stdout to the user). So if you want to fire off a task that will run in parallel with the webserver's other stuff, you need to have some sort of interprocess communication (e.g. a named pipe, socket, file, MPI communicator, etc.). (or you do something like run at or batch, which is basically using a file as a interprocess communication, and the at daemon watches the file) ___ 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] US export regulations for TICs
Hi ….. and that’s just the quick brief summary. If you are buying the product from the original manufacturer, the simple thing to do is to ask them if a certificate is required. That’s not definitive, but it’s probably a good start. If they are making controlled items and are not aware of it, that’s pretty unusual. Bob On Jul 7, 2015, at 3:06 PM, Jim Lux jim...@earthlink.net wrote: On 7/7/15 6:28 AM, Attila Kinali wrote: Moin, As we need a need a proper TIC here to do our research, we are going to buy one from ebay form a seller in the US and let a friend who is in the US at the approriate time and can pick it up to bring it back in the plane. Now the big question is, are there any export regulations regarding such equipment and if yes, where do I find it? (my search didnt show up anything approriate). Yes I know it's a boat anchor and that takeing it in a plane is kind of iffy, but it's better than shipping it. Ah, the complexities of Export Controls, with which I deal every other day. I'll summarize a bit here, for the benefit of other list members who might contemplate this. If it's straying too far off the list topics, let me know... Ebay sellers in general don't know anything about export controls, other than some just don't sell to foreigners (which they think neatly solves that problem it doesn't). In export control, there are US Persons and non-US persons. The former are US Citizens and legal permanent residents (green card holders), who are NOT representatives of a foreign entity. You can be a US citizen, but work for, say, Thales-Alenia Space Italia, and be a non-US person. If you are transferring export controlled goods (or information!) to a non-US person, you *may* need an export license, depending on what the goods are. Where the transfer takes place is immaterial (so if your friend going to do the pickup isn't a US person, the export would occur when he or she put their hands on the goods). Now to whether you need a license. There are two kinds of export controls in the US: US Munitions List (ITAR), run by the department of state, and Commerce Control Regulations (CCR) run by the Department of Commerce. USML stuff almost always needs a license, a non-trivial process requiring, typically, an end user certificate describing who the ultimate recipient is (e.g. you can't say I'm buying it for myself, when, really, you're transferring that 17-axis milling machine to a designated country) You can easily google the USML (the version at fas.org is a bit out of date): it's fairly straightforward, and MOST of the stuff will say specially designed for military purposes, so a piece of test equipment that has multiple uses probably won't be controlled, unless it's designed to be bolted into a fighter or ship or carried by an infantry soldier. There are some no conceiveable dual use things on the USML: GPS receivers that work at more than some high altitude or at Mach 5 are a nice example. For USML/ITAR stuff ALL exports need a license. Then, there's the EAR/Commerce rules. For these, which are much broader and cover more commodities and things, there's a which country is it going to distinction. Shipping fast CPUs to the UK, no problem; Shipping to North Korea, can't do it. USML is here https://www.pmddtc.state.gov/regulations_laws/itar.html I would suggest looking at Category 11 (Military Electronics) for which there was a recent amendment: https://www.pmddtc.state.gov/FR/2014/79FR37536.pdf the Export Administration Regulations (EAR) are here https://www.bis.doc.gov/index.php/regulations/export-administration-regulations-ear Chapter 3 might be of interest. It has rules on RF amplifiers, arbitrary waveform generator, signal analyzers, etc. I've never looked for counters or TICs. Thanks in advance Attila Kinali ___ 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] US export regulations for TICs
Chapter 3 might be of interest. It has rules on RF amplifiers, arbitrary waveform generator, signal analyzers, etc. I've never looked for counters or TICs. It's been a couple of years since I had to look into this stuff myself, but from what I've seen, frequency/TI counters aren't covered by State Department ITAR/USML rules unless they're part of a dedicated weapons system. For everything else, you need to search the Commerce Control List _carefully_ to be sure of the item's classification. When in doubt consult an attorney who specializes in export law. The cost of making a mistake can be out of all proportion to common sense, and relying on random advice found on the Internet (including mine) is a bad idea. That being said, you'll find a lot of hits on the CCL for terms like analyzer, oscilloscope, and digitizer, but not for counter. As Jim suggests, commercial electronic equipment generally falls into CCL category 3. The catchall classification for test equipment not otherwise listed is 3A992, which requires you to apply for an export license for items destined for Sudan. (Of course, some other countries such as Cuba, North Korea, and Iran will require more paperwork regardless of the item in question.) So as far as I'm aware, unless (a) the specific item is controlled as an ITAR munition, (b) you are shipping it to a questionable destination (or knowingly causing it to end up there), or (c) or you are transferring it to someone on various official sh!t lists (http://export.gov/ecr/eg_main_023148.asp), you're OK. -- john, KE5FX Miles Design LLC ___ 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] beaglebones, time, web services
Hi Having done this on *very* small machines with cgi before, the lag has never been an issue. Yes, the things I do are “tweaks” to variables, or data requests. I do not try to spawn a piece of code to compute PI to 800 places and wait for the result. Bob On Jul 6, 2015, at 10:24 PM, Jim Lux jim...@earthlink.net wrote: On 7/6/15 3:19 PM, Tom Harris wrote: Since you want simple just use a CGI script written in your language of choice. Very easy technology to learn, Python has support libraries out of the box if you want. You have a webpge with carious simple controls on it like buttons etc, you click a special button that posts a request to a URL, the webserver runs a script that generates the response, the webserver serves it out, your browser displays it. Why bother with learning a framework? Messing about with mechanics is far more fun! The only hiccup with the cgi approach (and with directly code the action in the guts of the server like with flask) is that the subprocess that's spawned has to complete before control returns (e.g. to serve stdout to the user). So if you want to fire off a task that will run in parallel with the webserver's other stuff, you need to have some sort of interprocess communication (e.g. a named pipe, socket, file, MPI communicator, etc.). (or you do something like run at or batch, which is basically using a file as a interprocess communication, and the at daemon watches the file) ___ 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] New wrist watch
Last night I put it by a window with 12 o'clock facing out as suggested in the manual. It says that it synced this morning at 12:04, so I can only assume it started at midnight and took four minutes. Spot checking it against the NIST website throughout the day, I can't visually see any difference in the edge of the second. Very happy with it so far. But I probably will do a no sync test some time. Leaving it in a metal box away from a window at night sounds quite reasonable and easy to set up. I'll do it for a week and see what happens. Dan On Jul 7, 2015, at 6:19 AM, Dave Martindale dave.martind...@gmail.com wrote: Two data points for one watch: When I bought a Casio PAW-1300, it was about 20 seconds fast. It said that it had last synced on September 24, but that information does not include the year. It was now June 10, so it had been running without a radio sync for at least 9 months (though it could have been 9 months plus 1 year, or plus 2 years...). If we assume the delay is only 9 months for 20 seconds of error, that's a error of about 2.8 seconds/month or about 1 PPM. A year later, the same watch got stored in a drawer where there was no light and poor radio reception. After 26 days without a successful radio sync, it had gained 2 seconds. (On the other hand, the watch does *not* handle a leap second when the leap second actually occurs. It simply keeps counting, so it ended up being 1 second fast after the recent June 30 leap second. It was correct the next morning, after its usual overnight sync to Colorado.) I normally leave the watch on the window ledge of a window approximately facing Colorado (I'm near Toronto). It gets lots of light to keep the battery charged, and reliably syncs every night. It has become my master time source that I sync all my other watches to when adjusting them. (Someday I need to build a time display for one of my GPS receivers, but the Casio works well enough). - Dave On Mon, Jul 6, 2015 at 6:45 PM, D W watsondani...@gmail.com wrote: With my new found interest in time nuttiness I thought I should upgrade to a decently accurate watch. I had some features I was looking for and settled on a Casio Wave Ceptor. My second choice was an Eco Drive, but the Casio had the right mix of features at a good price. As I was sitting outside reading the manual after buying it, I laid it flat on the table and started a manual sync to WWVB. The UI is pretty intuitive for having so few buttons and indicators. It quickly told me that it had found a stable signal, and about six minutes later it was synced. Pretty cool. Anyone know what the drift is like in this watch if it can't find the signal for several days/weeks? I would hope that actual performance is a little better than the +/- 15 sec per month stated in the manual. I should trap it in a faraday bag for a while to test it... Dan ___ 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.
