Re: [time-nuts] NMEA reader?
Hyper-term is free and gives a window with lat, long, time and the usual other stuff. VisualGPS (http://www.visualgps.net/) is free and provides a nice gui wrapper around above info. Jamie --- On Thu, 1/7/10, Jim Mandaville z...@dakotacom.net wrote: From: Jim Mandaville z...@dakotacom.net Subject: [time-nuts] NMEA reader? To: Discussion of precise time and frequency measurement time-nuts@febo.com Date: Thursday, January 7, 2010, 6:42 PM I'm totally new to this semi-DIY gps stuff. Can anyone recommend any NMEA packet reader software that will work on my old Windows 98 laptop (using data through the RS-232 serial)?. Searching online I find a lot of rather expensive software that does much more than I want to do. Any shareware or cheapware that just gives a window with lat, long, time and the usual other stuff? Jim ___ 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] thunderbolts not seeing satellites
It took some time, but I got both to work when connected directly to the antenna. So I would have to think that the antenna (or the LNA) has degraded over time and is producing very marginal signal strength, barely enough for the Tbolts to operate. I am happy my Tbols are fine! The Lucent antenna I am using is the one Björn posted a photo of. I do have an HP 53582A and a Motorola antenna (I think the Motorola antenna only has 26db of gain like the Lucent). I guess the Tbolts just require a little more signal strength to operate properly. Thanks Said for the gentle pointer to the recent discussion. With the baby I don't get as much time to keep up with the list and I missed the whole thread. I will make a new mount for my HP antenna and get it up on the roof. I don't have the snow issues in Las Vegas that others might have. :-) Jamie --- On Sun, 1/3/10, saidj...@aol.com saidj...@aol.com wrote: From: saidj...@aol.com saidj...@aol.com Subject: Re: [time-nuts] thunderbolts not seeing satellites To: time-nuts@febo.com Date: Sunday, January 3, 2010, 5:56 PM Hello Jamie, about a month ago there was a long thread that thoroughly discussed the problems folks have been seeing when running Thunderbolts through splitters. You may want to search the archive, and take a look.. bye, Said In a message dated 1/3/2010 17:42:07 Pacific Standard Time, jlt...@worldnet.att.net writes: Have you tried running it directly to the antenna, minus the splitter? Joe -Original Message- From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf Of James R. Gorr Sent: Sunday, January 03, 2010 2:14 PM To: time-nuts@febo.com Subject: [time-nuts] thunderbolts not seeing satellites Hello everyone! Hope your new year is going well so far. I have two Tbolts (one from TAPR and one from another guy), and neither one is locking on satellites. ___ 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] thunderbolts not seeing satellites
Hello everyone! Hope your new year is going well so far. I have two Tbolts (one from TAPR and one from another guy), and neither one is locking on satellites. My set up is a Lucent antenna, about 12 feet of LMR400, a Symmetricom 4 way Active SmartSplitter, then about 3 feet of LMR 195 to my non-TAPR Tbolt. I have another GPS (non Tbolt) on the SmartSplitter also (that works fine, ie: is RX satellites). This set up has worked for a couple years. I originally powered my non-TAPR Tbolt with three wall warts. When I got this GPS, I was told it took non-standard power of +12/+5/-7. A while ago I noticed my Tbolt stopped working. I took it offline and replaced it with one I bought from TAPR a year previous. Additionally, I powered my new Tbolt with an HP 6236B, and everything worked fine. Now, this morning I noticed my Tbolt is not working again! It powers up, draws expected current on start up (then backs down after oven warms up) and I can monitor it with tboltmon.exe. I did a factory reset then manually input my position. No critical alarms are showing (all green) and minor alarms are all green except for: Satellite Tracking, Oscillator Disciplining, and Almanac, which are yellow. I have all 0.0 AMUs under Signal Levels. I think because the other GPS (non-Tbolt) works, my antenna and splitter is fine. I have also tried switching ports on the splitter. I have tested my jumper cable for shorts and continuity. Interestingly enough, if I power my original Tbolt (the +12/+5/-7 one) from the wall warts, it will see 2 satellites, but with very poor signal strength. It will not see anything powered with +12/+5/-12 from the HP PS. Both Tbolts have the same symptoms. Anyone ever see issues like this? Or have any suggestions? Jamie ___ 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] delete
Reading and comprehension skills skills aside, Helmut is an ubber cool name! ++ Helmut! To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. --- On Sat, 3/7/09, gandal...@aol.com gandal...@aol.com wrote: From: gandal...@aol.com gandal...@aol.com Subject: Re: [time-nuts] delete To: time-nuts@febo.com Date: Saturday, March 7, 2009, 8:33 AM In a message dated 07/03/2009 16:32:31 GMT Standard Time, helmut.im...@t-online.de writes: Please delete me from the email distribution list. Thanks! Helmut ___ 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. --- Makes yer wonder don't it? ___ 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] perl and GPS time
It is not Slashdot, but leapsecond.com got a mention on perlmonks.com: http://perlmonks.com/?node_id=735502 Jamie ___ 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] TB PS/Antenna recommendations
Here is some information on different power-supplies for the tbolt and their performance: http://www.leapsecond.com/pages/tbolt/noise.htm My tbolt is a little different, it uses: +12/+5/-7 volts. The only thing I had on hand was a box for of wall-warts, so I grabbed three out and configured them as such: http://n3toy.net/images/power_supply.png Not sure of the quality of power, but it works. Jamie --- On Wed, 1/7/09, Richard Moore rich...@hughes.net wrote: From: Richard Moore rich...@hughes.net Subject: Re: [time-nuts] TBolt antenna To: time-nuts@febo.com Date: Wednesday, January 7, 2009, 8:54 PM On Jan 7, 2009, at 2:43 PM, time-nuts-requ...@febo.com wrote: Message: 6 Date: Wed, 7 Jan 2009 17:08:22 -0500 From: Ronald Held ronaldh...@gmail.com Subject: [time-nuts] TB PS/Antenna recommendations To: time-nuts@febo.com Message-ID: 9a86fb0e0901071408r4a205518mc346d7694f9af...@mail.gmail.com Content-Type: text/plain; charset=ISO-8859-1 I have not following all of discussions for a while, so perhaps I missed out on some of this. What do people suggest for a power supply and from where? The harder request is for an indoor antenna probable placed up against the window. Reliable dealers or stores would be very helpful. Ronald I'm using a fairly crappy triple-output open-frame Autec supply from Marlin P. Jones that was $13. I'm not recommending it, but it works. My antenna is an active patch type by Hawk that runs off +5V from the TBolt. It has a magnetic base for top of vehicle use. I've got it feeding two GPSDOs thru a splitter and it's working great. I got it from Synergy for $35 if I remember correctly -- been a while. I've got it duct taped to a 2x4 sticking our from under the eave of my lab. Most any active antenna will likely work OK outdoors, but I don't know about indoors -- think you'll want some higher gain version. Dick Moore ___ 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] WWV / WWVH / WWVB
http://dkc3.digikey.com/PDF/T091/P0529.pdf When I look at the catalogue, the description says: | UTC Receiver Module, 60kHz, no CPU | 561-1014-ND | 10.70 | CMMR-6P-60 | I have looked at modules like this before but what I saw was much more expensive. So I'd like to get one at $11.00. Have you been able to RX WWVB with it (even if you haven't written anything to decode it)? I wonder what the no CPU means? Jamie --- On Tue, 1/6/09, Scott Newell new...@cei.net wrote: From: Scott Newell new...@cei.net Subject: Re: [time-nuts] WWV / WWVH / WWVB To: Discussion of precise time and frequency measurement time-nuts@febo.com Date: Tuesday, January 6, 2009, 5:40 PM At 07:31 PM 1/6/2009, David M. Witten II wrote: I was confused by their description too. It does include the antenna. I bought two to play with. It seems pretty complete, but I haven't written any code to read it yet. Thanks--appreciate the confirmation! -- newell N5TNL ___ 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] How are you going to spend your extra second?
As simple as it is, time.gov shows the leap second. A screen capture from there is probably one of the easiest ways to see the leap second. Would be interested in seeing her leap second art. Jamie --- On Mon, 12/29/08, Magnus Danielson mag...@rubidium.dyndns.org wrote: I was just contacted by an artist that wants to capture the leap-second for a project she does. I think it very well matches the topic of this thread. It brings on the discussion on how to best observe the leap-second. For her part, getting the 23:59:60 reading would be the ideal. I came to realize that few computer clocks would report that even with propper NTP. So, ideas, knowledge, update since the last leap-second? I would sure like to see it in various forms. I would like to have a computer (UNIX/LINUX) clock that provides propper UTC... I would not mind seeing it popping out of my GPS clocks either. I don't think I will have DCF77, MSF or LORAN-C capability on new years eve, otherwise those should be possible to receive here too. 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. ___ 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] altitude difference between two gps
It does appear to be a datum issue. Although I never got the two GPS to match exactly, they are still a few meters apart. I did find an older thread on the topic from March also. Thanks for the replies! Jamie --- On Sat, 12/27/08, Ed, k1ggi k1...@arrl.net wrote: From: Ed, k1ggi k1...@arrl.net Subject: Re: [time-nuts] altitude difference between two gps To: 'Discussion of precise time and frequency measurement' time-nuts@febo.com Date: Saturday, December 27, 2008, 11:12 PM On the thunderbolt, what datum do you have selected in Setup Packet Masks and Options? If it is 0 (WGS-84), try 2 (NAD-27). -30m is about right for the geoid height around Las Vegas. Ed, k1ggi -Original Message- From: James R. Gorr [mailto:n3...@yahoo.com] Sent: Saturday, December 27, 2008 9:26 PM To: time-nuts@febo.com Subject: [time-nuts] altitude difference between two gps Hello everyone! I have a tbolt that I am monitoring with tboltmon.exe and some off-brand 12 channel GPS (I bought from Sure Electronics on eBay) that I am monitoring with VisualGPS. Both are fed from the same GPS antenna through a symmetricom splitter. There is a 30 meter difference in the altitude readings between the two. My tbolt says my altitude (after a self-survey) is ~761 meters and the 12 channel Sure Electronics GPS says my altitude is ~791 meters after 7,500+ readings. I took my hand held Garmin 12XL outside and it says my altitude is ~790 meters at street level. Anyone have an idea why my tbolt might be reading different from the other two devices? I am assuming the tbolt is reading low. Jamie ___ 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] altitude difference between two gps
Hello everyone! I have a tbolt that I am monitoring with tboltmon.exe and some off-brand 12 channel GPS (I bought from Sure Electronics on eBay) that I am monitoring with VisualGPS. Both are fed from the same GPS antenna through a symmetricom splitter. There is a 30 meter difference in the altitude readings between the two. My tbolt says my altitude (after a self-survey) is ~761 meters and the 12 channel Sure Electronics GPS says my altitude is ~791 meters after 7,500+ readings. I took my hand held Garmin 12XL outside and it says my altitude is ~790 meters at street level. Anyone have an idea why my tbolt might be reading different from the other two devices? I am assuming the tbolt is reading low. Jamie ___ 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] altitude difference between two gps
Yes. The pending leap second has me very scared. It is the Y2k bug of 2008. :-) Sorry, that is a tilde, not a negative sign. Meant as approximately 791 meters, although I may be using it completely wrong. The real value (mean average) is 790.83 meters for the Sure Electronics GPS. Sorry for the confusion. --- On Sat, 12/27/08, Richard W. Solomon w1...@earthlink.net wrote: From: Richard W. Solomon w1...@earthlink.net Subject: Re: [time-nuts] altitude difference between two gps To: Discussion of precise time and frequency measurement time-nuts@febo.com Date: Saturday, December 27, 2008, 7:24 PM -800 meters ?? Live in a mine ?? How can that be ? 73, Dick, W1KSZ -Original Message- From: James R. Gorr n3...@yahoo.com Sent: Dec 27, 2008 9:26 PM To: time-nuts@febo.com Subject: [time-nuts] altitude difference between two gps Hello everyone! I have a tbolt that I am monitoring with tboltmon.exe and some off-brand 12 channel GPS (I bought from Sure Electronics on eBay) that I am monitoring with VisualGPS. Both are fed from the same GPS antenna through a symmetricom splitter. There is a 30 meter difference in the altitude readings between the two. My tbolt says my altitude (after a self-survey) is ~761 meters and the 12 channel Sure Electronics GPS says my altitude is ~791 meters after 7,500+ readings. I took my hand held Garmin 12XL outside and it says my altitude is ~790 meters at street level. Anyone have an idea why my tbolt might be reading different from the other two devices? I am assuming the tbolt is reading low. Jamie ___ 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] How are you going to spend your extra second?
Not sure what your post has to do with time. But thanks for your anti-gun political commentary. I am going to spend my extra second making up for the time it took me to delete your post. --- On Wed, 12/24/08, Mark Sims hol...@hotmail.com wrote: From: Mark Sims hol...@hotmail.com Subject: [time-nuts] How are you going to spend your extra second? To: time-nuts@febo.com Date: Wednesday, December 24, 2008, 1:22 PM Unfortunately, in many US cities, getting shot on New Years is an all too common occurance. Knuckle dragging idiots celebrate with lots of booze, ammunition, and firearms. At the stoke of midnight they unleash a hail of gunfire into the air... and what goes up tends to come back down. Inevitably somebody (more often than not, a child) will be in the exact place where something comes down.-In swedish leap-second translates to skott-sekund, and skott translates back to shot, so recalling the recent thread on fire-arms, don't get shot on the leap-second. _ Send e-mail anywhere. No map, no compass. http://windowslive.com/oneline/hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_anywhere_122008 ___ 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] How are you going to spend your extra second?
Maybe I jumped the gun... (no pun intended). My apologies, I must not have gone back far enough. Ok, maybe the pun was intended. :-) --- On Wed, 12/24/08, Mark Sims hol...@hotmail.com wrote: From: Mark Sims hol...@hotmail.com Subject: [time-nuts] How are you going to spend your extra second? To: time-nuts@febo.com Date: Wednesday, December 24, 2008, 5:11 PM James, If you had read my previous post you would have realized I am far from an anti-gun political nut. I have an arsenal that would make Sadaam blush (over 100 pieces, mostly military models from .17 cal to .50BMG). I paid for the HP45 calculator that put me through engineering school by shooting rabbits for ranchers. I was seventh in the nation in a Naval postal match. What I am against is nutcases that spoil the fun for the rest of us by doing things like unloading a few magazines of ammo into the sky in the middle of a crowded city. _ It’s the same Hotmail®. If by “same” you mean up to 70% faster. http://windowslive.com/online/hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_broad1_122008 ___ 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] spectracom line taps
I have a Spectracom 8140 frequency distribution amp. I see on ebay there are line taps for this device. Do I need the line taps? Or can I just use the 8140 as is? What are the line taps supposed to do? Jamie Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ ___ 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] Best choice for house 10MHz reference...??
Hi George, What are you asking for a Thunderbolt? Jamie --- George [EMAIL PROTECTED] wrote: John Miles wrote: As unhappy as you may be to hear it, Mike, you're done upgrading, at least for now. Thunderbolts are about as good as they get. Yes, some units like the HP and Jackson Labs clocks can do somewhat better, and with entirely-different equipment, you might be able to tell. Not with the 49xP analyzer, though. Your 497P is limited by its 1-Hz counter LSD, not the Thunderbolt. 1E-10 accuracy from the Thunderbolt is 1 Hz at 10 GHz, and that's about what the Thunderbolt does at tau=1s, even though the spec sheet shows it closer to 1E-9 at t=1s. That means that there is no conceivable benefit to further upgrading the 10 MHz reference beyond where you already are. I know, I know, that's the worst news of all. :) Focus on giving the Thunderbolt the best signal you can, via antenna mounting. -- john, KE5FX And, if anyone out there still need a Thunderbolt (for less than the ebay price), I have a few more OEM units available. 73, geo - n4ua ___ 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. Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs ___ 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] Best choice for house 10MHz reference...??
Sorry for the noise! --Jamie --- James R. Gorr [EMAIL PROTECTED] wrote: Hi George, What are you asking for a Thunderbolt? Jamie --- George [EMAIL PROTECTED] wrote: John Miles wrote: As unhappy as you may be to hear it, Mike, you're done upgrading, at least for now. Thunderbolts are about as good as they get. Yes, some units like the HP and Jackson Labs clocks can do somewhat better, and with entirely-different equipment, you might be able to tell. Not with the 49xP analyzer, though. Your 497P is limited by its 1-Hz counter LSD, not the Thunderbolt. 1E-10 accuracy from the Thunderbolt is 1 Hz at 10 GHz, and that's about what the Thunderbolt does at tau=1s, even though the spec sheet shows it closer to 1E-9 at t=1s. That means that there is no conceivable benefit to further upgrading the 10 MHz reference beyond where you already are. I know, I know, that's the worst news of all. :) Focus on giving the Thunderbolt the best signal you can, via antenna mounting. -- john, KE5FX And, if anyone out there still need a Thunderbolt (for less than the ebay price), I have a few more OEM units available. 73, geo - n4ua ___ 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. Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs ___ 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. Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ ___ 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] RFTG-m-RB
Attached is a photo of the output of my RFTG-m-RB J2 (10 MHz REF OUT). Is this the expected shape? J4 (15 MHz OUT) is a nice clean sine wave. Can I safely use this 10 MHz signal as a reference for other gear that takes a 10 MHz input? Thanks in advance! Jamie Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hsinline: IMG_1366.JPG___ 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] RFTG-m-RB
My scope was set for 2 volts / div, terminated right in to the scope. Arguably not the best way to view it... Here is another photo, terminated with 50 Ohms and amplitude set at 1 volt per division. I guess it looks a lot cleaner. Not sure what the impedance is supposed to be. I always assumed frequency references should be sine waves. If that is not the case, I guess I can use this for a reference for other equipment? And if a square wave is just fine, could I use a clock-block to divide the 15 MHz of the XO down to 10 MHz? If not, what other alternatives are there to get 10 MHz out the the 15 MHz? I have seen discussion on the reflector about this, I will go back and search for any circuits someone might have posted. Sorry to unload so many questions! Thanks! --Jamie --- Rob Kimberley [EMAIL PROTECTED] wrote: James, Not played with one of these units, but looks like a very useable 10 MHz square wave. What impedance are you terminating with? What is the amplitude scale on the 'scope? Rob Kimberley -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of James R. Gorr Sent: 19 January 2008 19:15 To: time-nuts@febo.com Subject: [time-nuts] RFTG-m-RB Attached is a photo of the output of my RFTG-m-RB J2 (10 MHz REF OUT). Is this the expected shape? J4 (15 MHz OUT) is a nice clean sine wave. Can I safely use this 10 MHz signal as a reference for other gear that takes a 10 MHz input? Thanks in advance! Jamie Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs ___ 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. Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shoppinginline: IMG_1371.JPG___ 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] RFTG-m-RB
What I am trying to accomplish is provide a reference for my HP 3586C. I want to try my hand at the FMT in February. I have a set of the Lucent RFTG-m-XO and RFTG-m-RB. My options are use the RB as stand alone or use the XO with the GPS, or combine the two. (I believe I have the matched set that should work together). Either way, they both output 15 MHz sine wave and the RB outputs 10 MHz square wave. Is there an advantage using one over the other? I would like to set them up together as the matched set they are supposed to be, although I don't think there is any advantage to that for me really. So, for starters I was just going to use the Rb's 10 MHz output. But the more I think about it, the more questions I have. From reading all the previous posts about these the GPS does not disciplines the Rb. The Rb unit is there to take over in the even the GPS fails. So that leads me to believe that the XO is more accurate in the short term as long as it has something to steer it like a GPS or the Rb. So my guess is that the XO would really be a better choice, but I am back to dividing the 15 MHz down to 10 MHz. I understand about dividing by 3 and multiplying by 2. Could someone please provide a circuit? Am I right in my logic and am I going down the right path with my project? Thanks for all the expert support. Jamie --- John Ackermann N8UR [EMAIL PROTECTED] wrote: Bruce Griffiths said the following on 01/19/2008 05:20 PM: James R. Gorr wrote: I always assumed frequency references should be sine waves. If that is not the case, I guess I can use this for a reference for other equipment? And if a square wave is just fine, could I use a clock-block to divide the 15 MHz of the XO down to 10 MHz? If you ever have to do this, the clock block is an unnecessarily complex solution. Actually, the Clock-Block is about the worst possible solution to this problem (since I designed it, I don't have to worry about offending anyone in saying that!). The synthesizer used in the Clock-Block has very, very bad phase noise; that's the price of very wide frequency coverage in a single chip. I haven't done it to my unit yet, but from tracing the circuitry of the RFTG, it doesn't look like it would be hard to bypass the 10 to 15 MHz conversion circuitry and feed 10 MHz from the oscillator directly to the primary output. That would be a much better solution. John ___ 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. Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ ___ 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 phase-noise measurement seminar coursebook
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Thanks for the scan! As someone not in the industry or having a background in metrology, a lot of stuff on this list is *way* over my head, but I enjoy reading the dialog. And scans like this are a big help to me. I have heard the term phase-noise used often here but never really understood what it meant. Hopefully this scan will help. Thanks again. Jamie --- John Miles [EMAIL PROTECTED] wrote: This seminar was given June 14, 1985 at Red Bank, NJ. Its handout covered pretty much every bit of information and lore HP had to impart on phase-noise measurement. Anyone interested in PN measurement with 80s-era hardware (8566/8568/3585A, 11729B/C, 3047A, etc.) may want to download a copy of the course notes that I just scanned. http://www.ke5fx.com/HP_PN_seminar.pdf (124 pages, 7 MB) -- john, KE5FX ___ 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. Be a better Heartthrob. Get better relationship answers from someone who knows. Yahoo! Answers - Check it out. http://answers.yahoo.com/dir/?link=listsid=396545433 ___ 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] austron 2201A antenna
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hello all, I have an Austron 2201A GPS receiver, but no antenna. I know it does not take a standard antenna and I have not been able to find an original on ebay since I got the receiver. Anyone have any suggestions on where to locate one? Is it possible to make or purchase a down-converter and maintain the original specifications? I did not realize when I bought the unit it took something special. Anyone know why they decided to go with something non-standard? Maybe to lessen the loss in the coax for an extended run? Jamie Tonight's top picks. What will you watch tonight? Preview the hottest shows on Yahoo! TV. http://tv.yahoo.com/ ___ 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] Bush Accepts Pentagon Position on GPS
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Not a technical link, just FYI: WASHINGTON President Bush on Tuesday accepted the Pentagon's decision to stop buying Global Positioning System satellites that can intentionally degrade the accuracy of civil signals used for a myriad of purposes _ from tracking aircraft to finding missing skiers. http://www.foxnews.com/wires/2007Sep18/0,4670,BushGlobalPositioning,00.html Luggage? GPS? Comic books? Check out fitting gifts for grads at Yahoo! Search http://search.yahoo.com/search?fr=oni_on_mailp=graduation+giftscs=bz ___ 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: You know your getting old when...
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY It does seem perfectly acceptable when working HF to *say* KCs (I'll be listening around x MHz, plus or minus 10 KCs). Writing it does sort of date a person though, which simply shows a level of experience. Re: [time-nuts] OT: You know your getting old when... Does OT mean off topic or old timer? :-) --- Jack Hudler [EMAIL PROTECTED] wrote: When you find yourself writing 80 KC instead of 80 KHz. Jack Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. http://tv.yahoo.com/ ___ 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] great advice from the list
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY It has been removed already. I thought it was amazing that 6 people bid on it the last time I saw it. --- [EMAIL PROTECTED] wrote: Hi Jamie, hopefully you flagged this as a fraudulent listing to Ebay, they usually react quickly to these. bye, Said ** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour ___ 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. Fedora Core 4 Linux Sick sense of humor? Visit Yahoo! TV's Comedy with an Edge to see what's on, when. http://tv.yahoo.com/collections/222 ___ 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] great advice from the list
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Was looking around ebay this weekend and came across a nice IFR-1900 service monitor. Item number: 160146014702 So many red flags popped up when I read the description. Starting bid was 300 and something, WAY too cheap for such a clean unit... The seller has a 0 (zero) feedback score... Only been a registered user since August 6th... Seller only takes money order... Bad English for someone from Canada... So, taking a hint from this group, I emailed the guy and asked if it had the NTSC option installed. Told him to look in the rear for the NTSC input. Here is the reply I got back: Yes, it have the NTSC option installed. It's a great IFR. Let me know, Pete --Jamie Boardwalk for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for today's economy) at Yahoo! Games. http://get.games.yahoo.com/proddesc?gamekey=monopolyherenow ___ 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] manual request: Austron 2201A
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Thanks, Rob! My unit has: 23411437-2 Time Code (IRIG-B) 23411900 Sine Output I also have a 23412342 LORAN MODULE, not sure if it is for this unit. Thanks for checking. Jamie --- Rob Kimberley [EMAIL PROTECTED] wrote: Jamie, I believe I have one in the store. Will take a look tonight when I get back. May also be some of the module manuals. What plug-ins does it have? Rob Kimberley -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of James R. Gorr Sent: 18 July 2007 23:30 To: time-nuts@febo.com Subject: [time-nuts] manual request: Austron 2201A ); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] om Looking for a manual for an Austron 2201A GPS receiver. Thanks! --Jamie Building a website is a piece of cake. Yahoo! Small Business gives you all the tools to get online. http://smallbusiness.yahoo.com/webhosting ___ 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] manual request: Austron 2201A
); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Looking for a manual for an Austron 2201A GPS receiver. Thanks! --Jamie Fedora Core 4 Linux Ready for the edge of your seat? Check out tonight's top picks on Yahoo! TV. http://tv.yahoo.com/ ___ 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] SMB-F to SMA-F Cable
If no one stepped up yet, let me see what connectors I have. I know I got LMR-100 but not sure if I have the connectors, but this will be the excuse I need to run to the supply house and stock up... Jamie --- Jason Rabel [EMAIL PROTECTED] wrote: I figured I would make the request to you guys before I hit fleabay (they have some but I don't need a dozen - just one). Does anyone have a short SMB-F to SMA-F cable I could buy? This is to connect to a Trimble ACE-III receiver. I have some extra receivers too if someone would rather do a swap. Jason ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts Fedora Core 4 Linux __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] HP59309A HP-IB Digital Clock Operating and Service Manual
I would like a copy of the manual also. Could it be put it on the wiki? --- Norman J McSweyn [EMAIL PROTECTED] wrote: Martin, Stupid question. Is the front panel switch set to ext? I have a manual. I'd be willing to scan it if I somone would be willing to host it. Norm ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts Fedora Core 4 Linux __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Any you Nuts going to NAB?
I am, but I live here... --- [EMAIL PROTECTED] wrote: Well who is in Vegas next week? ** See what's free at http://www.aol.com. ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts Never miss an email again! Yahoo! Toolbar alerts you the instant new Mail arrives. http://tools.search.yahoo.com/toolbar/features/mail/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Hello
Here is a link to a photo of an HP 10811 http://www.slack.com/images/TE/HP10811A.jpg Jamie --- Neville Michie [EMAIL PROTECTED] wrote: Hi I am new to this group, my background; electronics, amateur radio and clocks. I am developing a free pendulum and to analyse its operation I compare it to WWV on 5 or 10 MHz, the only available radio frequency standard on air in Australia. To examine the phase drift and jitter I compare it with a 1MHz rock in an oven. I have a HP 5328A which is not stable. It is marked as having option 010 but when I look inside there is only one crystal, 10mhz, which looks like an el cheapo, and no sign of an oven. Can anyone tell me what option 010 looks like? I intend to buy a $20, better than average, 10mhz rock and put it in an oven. Any advice would be appreciated, Neville Michie ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts Fedora Core 4 Linux 8:00? 8:25? 8:40? Find a flick in no time with the Yahoo! Search movie showtime shortcut. http://tools.search.yahoo.com/shortcuts/#news ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] HP-58532A antenna
I actually bought one of each of the antennas, just haven't gotten to mount them outside yet. I plan to do some simple tests against each other but do not have the expertise or equipment to run any in-depth measurement. --- Jose V. Gavila [EMAIL PROTECTED] wrote: Hi Colin, I just purchased a GPS antenna on eBay that was listed as an HP-58532A. It does not have the look or dimensions of the 58532A. It is marked as a Lucent KS- 24019L112A. The case is marked with 26dB gain and comes with a type N connector. The seller is accelium. Does anyone know if this is in fact a 58532A or did someone other than HP/Symmetricom produced it? I got one at eBay and got an HP-58832A manufactured by Symmetricom. Here you have the link, as item has a picture: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemitem=330076238344 If it is not that kind, I guess you have got another thing :-(! Regards, JOSE -- 73 EB5AGV / EC5AAU - JOSE V. GAVILA La Canyada - Valencia (SPAIN) - Loc: IM99SM Vintage Radio: http://jvgavila.com Vintage Test Equipment: http://jvgavila.com/testeq.htm European Boatanchors List: http://groups.yahoo.com/group/euro_ba_swap ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts Fedora Core 4 Linux Need Mail bonding? Go to the Yahoo! Mail QA for great tips from Yahoo! Answers users. http://answers.yahoo.com/dir/?link=listsid=396546091 ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Concern over Daylight Saving Time
I know there is an issue with Java, and I also noticed a new Micro$oft patch (KB928388: 2007 Time Zone update for Windows XP) that has to do with time, but I am not sure if it has to do with Daylight Saving Time. Jamie --- Bob Kupiec [EMAIL PROTECTED] wrote: March 11 at 02:00 The beginning of Daylight Saving Time in 2007. Or the end of the world? I work in an IT department and I'm finding that many of my colleagues aren't concerned about this at all. There hasn't been much concern about correcting the issue by patching systems and applications. Is this just my inner time-nut talking, who will be concerned that the clock will be off an hour on various devices? Here is one URL I've found with some details on various problems, fixes, and workarounds: http://www.reganfamily.ca/dst/ ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta. http://advision.webevents.yahoo.com/mailbeta/newmail_tools.html ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] Some Lucent RFTG-m-RB data
I have a '97 box and the disassembly is as you described for the '96 box, except I only have 9 screws on the bottom. --- Bill Hawkins [EMAIL PROTECTED] wrote: Received two of the subject units, one built in 96 and one in 97. The dates are the first two numbers in the serial number. Took the 96 apart and learned that the LPRO-101 is not physically connected to the main board, except through a pin connector. When the unit is turned upside down, you can see a pattern of 6 screws in two rows of three. These secure the LPRO. The rest of the screws hold the main board. Do not turn the unit upside down but stand it on its rear fins as you remove the screws. This keeps the LPRO from dropping away and bending the pins. The LPRO has a thermal plate that provides good conductivity to the case, so it can dissipate about 15 watts. There is no thermal goo between the plate and the box, but the plate may be stuck to the box. Put a screw in a hole and push on it to release the LPRO. Then, if you have removed the 10 screws that hold the panel to the box, it should all lift out easily, with the LPRO hanging by its connector. I'd recommend laying the box down in its normal position and sliding the innards out horizontally. Imagine my surprise when what I'd learned didn't work on the 97 box. That assembly has a clamp that holds the LPRO in place, so pushing on a screw doesn't work. There are four screws on the back, between the fins. Loosen them to loosen the clamp, but don't remove them. Reassembled both - you don't want to run the LPRO without a heat sink. The 97 unit drew 1.4 amps at 24 VDC at startup. The NO GPS and Fault lights were lit. The current dropped to .7 amp but the Fault light was still lit. Got 10 MHz at the J1 test point but nothing at the 10 MHz output. Went away for an hour, came back to find the ON light, got 10 MHz at J2, didn't check 15 MHz. The 96 unit had the same behavior, but the 10 MHz was more accurate. The box got quite warm, but you could keep your hand on it. (How's that for quantitative?) I have two Z3801s and two Racal-Dana model 1992 counters set to Phase A-B. One counter has been measuring a 4040 cesium box against one of the GPS receivers. The other counter measures the phase difference between the Z3801s. With the 96 unit in place of the 4040, phase rotation was 220 degrees in 20 minutes. The GPS comparison doesn't rotate, but varies between 50 and 70 degrees. I consider that an indication that the receivers are OK. The holdover accuracy varies between 0.5 and 5 microseconds, depending on when the crystal last cracked. If I did the math right, a 360 rotation will take 2000 seconds. This means the LPRO is about 5x10E-11 off from GPS, no? Two other questions: What is the BITE pin on the LPRO? Some Built-In Test? What is the protocol for the data at J6? Can it be the same as the Z3801? Bill Hawkins ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts Fedora Core 4 Linux __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] LUCENT RFTG-m-RB
I'm hopeful that either the RB can lock onto a PPS via the DB9, or a 10 MHz input. If you can put a 1PPS from a GPS in it to discipline it, that would be cool. But what do you have that outputs 10 MHZ that would be better than the Rb to discipline the Rb? Maybe I got this all wrong, but I thought the idea was you would put in a 1PPS to the Rb and get a really clean 10 MHz out? Jamie --- Jason Rabel [EMAIL PROTECTED] wrote: Here are two GPS disciplined standards, not sure if they are Rb. Those are the XO units, but they do have the GPS in them, as you can see the antenna connector (looks like a TNC). The other person selling all the RBs is also selling the RFTG-M-XO (same as you linked to) only about 5 popped up recently and I think only 1 is currently left, for like $180 BIN. I was thinking about getting one of the XO's, but I'm going to hold out until I get my RB and see what can be done with it by itself. I'm hopeful that either the RB can lock onto a PPS via the DB9, or a 10 MHz input. Worst case it could be removed from the lucent module and used by itself. Also to reply to someone else in this thread - I've signed up on the Lucent website but waiting for verification (manual process) before I can do anything. If I get any documentation I will be sure to let you guys know. Jason ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts Fedora Core 4 Linux __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] LUCENT RFTG-m-RB
Here are two GPS disciplined standards, not sure if they are Rb. http://cgi.ebay.com/GPS-FREQUENCY-STANDARD-RFTG-LUCENT_W0QQitemZ290065147621QQihZ019QQcategoryZ25399QQrdZ1QQcmdZViewItem http://cgi.ebay.com/GPS-FREQUENCY-STANDARD-RFTG-LUCENT_W0QQitemZ290065149913QQihZ019QQcategoryZ25399QQrdZ1QQcmdZViewItem Jamie __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Re: [time-nuts] motorola oncore descriptions
Wow, thanks! You answered all my questions, and very quickly. -- Jamie --- Jason Rabel [EMAIL PROTECTED] wrote: Hi Jamie, The VP is the top of the line model. I bought one of the VP models from midnight_seller on eBay, it is running the latest firmware (10), has an onboard battery, right angle MCX, and has all the features enabled (IBC), position hold, 1PPS and all that jazz. I asked Randy @ Synergy what that code meant and he said the following: The options go like this: I: TRAIM B: Basic plain vanilla receiver C: Carrier phase The UT+ is the timing model, it uses a subset of the VP commands. It also only works in the Motorola Binary format, it can not switch to NMEA mode. It also has TRAIM and position hold. Besides the 1PPS output, it can also do a 100PPS output. I bought a couple of these from sales3600 on eBay, they do NOT have a battery, have a straight MCX connector, and they were running firmware 3.1, which the latest is 3.2, I again asked Randy @ Synergy what the difference was and he said 3.2 had a fix for 100PPS. He would update a receiver for $25 each, but since I'm not using 100PPS I have no real reason to upgrade it since it works fine as-is. The GT models are more for navigation, not timing. They do not have position hold or TRAIM. They do have 1PPS but it is not as accurate as the VP or UT+ models. For the prices on eBay I would get the VP receiver, unless you specifically want/need the 100PPS, which you would still have to update the firmware. Once you start considering costs for everything else you will need, i.e. adapter for power RS232 signals, antenna, etc... You could just also spend a little more and get a M12M Timing (newer model) Starter Kit from Synergy Systems. Now, about the Rockwell Jupiter 8 boards... The TU30D140 is 5V powered (Antenna can be passive, 5V or 12V) The TU30D160 is 3.3V powered (Antenna can be passive, 5V or 12V) Both boards have 10 KHz output. That's about it... Any of the above units will work with NTP, in their native binary modes. I know with the Jupiter 8 if you switch it to nmea mode then the time will be 1-2 seconds behind always in the nmea sentences. I've experienced the same issue with an old sirf receiver, and a superstar II. I haven't tried my motorola in nmea mode so I don't know what it would do. As far as support goes, the motorola has the most options in NTP. I'm listing a couple jupiter boards on eBay, and I would be willing to sell them direct for less than what I'm listing them. If you dig around in the time-nuts archives, you can a discussion on these boards within the past couple months I believe. I have loads of PDFs for all the above Motorola Rockwell stuff. Too much to email but I can throw it online and you can download whatever you need or want. If you want a frequency reference, someone has been selling Brandywine GPS-4 units on eBay for $355, I don't know how many he has left or when the next batch will be listed. You can go to their website for more info, but it's a GPS unit with an OCXO and everything. Jason Hello all I am looking for information on the different Motorola Oncore GPS's. Would like to know what the difference is between the UT+ and VP, and the differences between the different model numbers. Advantages of one over the other? Stuff like that. The links from TAPRs page to Motorola is no longer valid. Can anyone point me to a good source of basic information like that? Maybe someone had an e-version of the specs for these? Looking at different ones on ebay and not sure which one to get for building a frequency reference like the one by Brooks Shera. Also, I found some Rockwell Jupiter's, models TU30D140 and TU30D160. What is the difference between them? I believe the TU30D140 has the 10KHz output. Is that true? Thanks in advance! --Jamie ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts Fedora Core 4 Linux Do you Yahoo!? Everyone is raving about the all-new Yahoo! Mail beta. http://new.mail.yahoo.com ___ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
