[time-nuts] Absolute Time Model 300
All, I recently acquired an Absolute Time Model 300 GPSDO. It is a very old unit (late 1990s vintage). I have been unable to find any information online about it, besides eBay listings. It does power on, and the digital stuff seems to be working. I have tried connecting an antenna but it does not find satellites, or give any indication that it's looking really. There is an unknown fault code on the screen (0B00). I've done some troubleshooting around the inside, checked voltages etc, and can't find anything obvious that is wrong. Does anyone have any information or documentation on this model? I'd like to give it one last shot at working again before I strip it and re-use the enclosure for another project. Thanks 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.
Re: [time-nuts] KS-24361 REF-0 standalone
Nigel, this is very useful. Thanks. I don't particularly like how the 10MHz test point signal is generated. I made my modification easily reversible so that I could change it when I found a better way. I will explore the area you describe in your notes. Best regards Dan On Aug 15, 2015, at 8:48 AM, GandalfG8--- via time-nuts time-nuts@febo.com wrote: I also did a quick write up recently about how I added the 10MHz test point output to my REF-1. Hi Daniel Many thanks for your 10Mhz write up for the REF-1, that's very interesting and a nice bit of detective work. Back in January I took a quick look at the underside of a REF-1 board in the area beneath the oscillator and identified what seemed to be a pick off point very close to the output of the 10MHz doubler. I'm pretty sure it was sinusoidal but can't remember for sure now and I never did find the time to get back to it and check it properly. I'll attach a copy of my very brief notes just in case it might give you a starting point for your search for a cleaner signal but if it doesn't get through to the list I'll send you a copy direct. Regards Nigel GM8PZR 10MHz Pick Off.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. ___ 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] KS-24361 REF-0 standalone
exactly my thinking. I will guess it wants the string that says I have a 3d position lock. Something like @@ and 30-40 characters that would be fixed.I think there is a CRC at the end. But all of the message can be copied from a real oncore or simply monitor what comes out of the KS GPS unit. Hard to say whats needed but a good discussion. Be it any number of uProcs they can all easily do a fixed string. Regards Paul WB8TSL On Fri, Aug 7, 2015 at 5:13 PM, D W watsondani...@gmail.com wrote: Yes, I'm hoping that it just wants a dummy string to say GPS is ok, and doesn't actually use any information in it. If that's the case, code can be developed for PIC and AVR that will work for just about anyone, using a ~$1 chip. Even if the string does need to contain real GPS info, it should still be quite easy to do. A while back I wrote some code to parse the serial string from a Jupiter-T and display the information on a 4 line LCD display. It worked very nicely but I never did anything useful with it. I think I'll take Bob's notes and incorporate the REF-0. That would make for a very compact setup. Dan On Aug 7, 2015, at 2:06 PM, paul swed paulsw...@gmail.com wrote: Looking forward to the notes. Yes it could be fairly simple if what ref 0 wants is a string that essentially says the system is fixed with 3 d accuracy. Perhaps after that the ref 0 makes no checks other then the string keeps coming with the correct quality. Not to push a particular proc but any of the low end ones will do that stunt very easily. That would be pretty sweet. Paul WB8TSL On Fri, Aug 7, 2015 at 10:13 AM, Bob Camp kb...@n1k.org wrote: Hi Ok, I will write something up and post it here. It will probably take a few days to get it all into a form that answers most of the questions. What you will need: 1) A working REF-0 2) A PIC or other micro to get things going 3) A GPS with a PPS output (any will do) 4) Code specific to your GPS and the needs of the REF-0 Since the Oncore needs to be set up each time its booted, there is no real advantage to using one. You still need an MCU in the mix. More to follow. Bob On Aug 7, 2015, at 5:24 AM, Graham planoph...@aei.ca wrote: Bob, I would like that information too please and thank you. I have a pair that is working quite well and I also have a second REF-0 that I want to start testing but just haven't got round to it yet to figure out what is needed. cheers, Graham ve3gtc On 2015-08-07 02:39, Bob Camp wrote: Hi You need to get the Oncore running with the correct position locked in and spitting out the right strings. Thats all done by the CPU in the REF-1 unit. The REF-0 simply grabs the data off of the string as it comes by. Ill see if I can dig out the information and send it to you off list. Its buried around here somewhere. Bob On Aug 6, 2015, at 10:02 PM, Edesio Costa e Silva time-n...@tardis.net.br wrote: Thanks. I have some Motorola Oncore available. Can you detail this fairly simple manipulation of the signal lines? Regards, Edésio On Thu, Aug 06, 2015 at 09:57:20PM -0400, Bob Camp wrote: Hi People got a bit ???excited??? about the level of KS box discussions. All of the work decoding the 15 pin connector and how to drive the REF-0 was taken off list. Simple answer: Yes you can run a REF-0 by it???s self. It needs a dummy string that looks like the output of a Motorola Oncore to feed it and some fairly simple manipulation of the signal lines. It will then quite happily discipline to the pps you feed it. Bob On Aug 6, 2015, at 7:27 PM, Edesio Costa e Silva time-n...@tardis.net.br wrote: Hello Fellows! Had anyone managed to run the KS-24361 REF-0, the one without GPS, as a standalone unit? If so, can you provide some links on how to configure it? The reason to try this is cost. The REF-0 unit costs USD 25 + USD 52.30 (shipping to Brazil) and I have to pay the same amount as custom taxes. Right now the REF-0/REF-1 pair would be too expensive. Regards, Edésio ___ 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
Re: [time-nuts] KS-24361 REF-0 standalone
Yes, I'm hoping that it just wants a dummy string to say GPS is ok, and doesn't actually use any information in it. If that's the case, code can be developed for PIC and AVR that will work for just about anyone, using a ~$1 chip. Even if the string does need to contain real GPS info, it should still be quite easy to do. A while back I wrote some code to parse the serial string from a Jupiter-T and display the information on a 4 line LCD display. It worked very nicely but I never did anything useful with it. I think I'll take Bob's notes and incorporate the REF-0. That would make for a very compact setup. Dan On Aug 7, 2015, at 2:06 PM, paul swed paulsw...@gmail.com wrote: Looking forward to the notes. Yes it could be fairly simple if what ref 0 wants is a string that essentially says the system is fixed with 3 d accuracy. Perhaps after that the ref 0 makes no checks other then the string keeps coming with the correct quality. Not to push a particular proc but any of the low end ones will do that stunt very easily. That would be pretty sweet. Paul WB8TSL On Fri, Aug 7, 2015 at 10:13 AM, Bob Camp kb...@n1k.org wrote: Hi Ok, I will write something up and post it here. It will probably take a few days to get it all into a form that answers most of the questions. What you will need: 1) A working REF-0 2) A PIC or other micro to get things going 3) A GPS with a PPS output (any will do) 4) Code specific to your GPS and the needs of the REF-0 Since the Oncore needs to be set up each time it’s booted, there is no real advantage to using one. You still need an MCU in the mix. More to follow. Bob On Aug 7, 2015, at 5:24 AM, Graham planoph...@aei.ca wrote: Bob, I would like that information too please and thank you. I have a pair that is working quite well and I also have a second REF-0 that I want to start testing but just haven't got round to it yet to figure out what is needed. cheers, Graham ve3gtc On 2015-08-07 02:39, Bob Camp wrote: Hi You need to get the Oncore running with the correct position locked in and spitting out the right strings. That’s all done by the CPU in the REF-1 unit. The REF-0 simply grabs the data off of the string as it comes by. I’ll see if I can dig out the information and send it to you off list. It’s buried around here somewhere. Bob On Aug 6, 2015, at 10:02 PM, Edesio Costa e Silva time-n...@tardis.net.br wrote: Thanks. I have some Motorola Oncore available. Can you detail this fairly simple manipulation of the signal lines? Regards, Edésio On Thu, Aug 06, 2015 at 09:57:20PM -0400, Bob Camp wrote: Hi People got a bit ???excited??? about the level of KS box discussions. All of the work decoding the 15 pin connector and how to drive the REF-0 was taken off list. Simple answer: Yes you can run a REF-0 by it???s self. It needs a dummy string that looks like the output of a Motorola Oncore to feed it and some fairly simple manipulation of the signal lines. It will then quite happily discipline to the pps you feed it. Bob On Aug 6, 2015, at 7:27 PM, Edesio Costa e Silva time-n...@tardis.net.br wrote: Hello Fellows! Had anyone managed to run the KS-24361 REF-0, the one without GPS, as a standalone unit? If so, can you provide some links on how to configure it? The reason to try this is cost. The REF-0 unit costs USD 25 + USD 52.30 (shipping to Brazil) and I have to pay the same amount as custom taxes. Right now the REF-0/REF-1 pair would be too expensive. Regards, Edésio ___ 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. ___ 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] Flashback to 1988 (Austron Catalog)
Just to follow up, the catalog is now available for download on KO4BB. It is listed under Misc Test Equipment - Austron. Happy reading. Dan On Jul 26, 2015, at 4:23 PM, paul swed paulsw...@gmail.com wrote: I don't think there is one. Watch out there is one located I believe on a Chinese site. I was told its actually malware. On Sun, Jul 26, 2015 at 9:49 AM, Dan Watson watsondani...@gmail.com wrote: Sure. I uploaded a scan of the catalog parts to KO4BB. It's listed in Recent Uploads awaiting sorting. As for the 2100F manual, is there a scan available online already? Dan On Sun, Jul 26, 2015 at 2:03 AM, Poul-Henning Kamp p...@phk.freebsd.dk wrote: In message cac2_fprrd0hpwbrqbejvwsiuaq8afrmn1be25wtdqnh+pxy...@mail.gmail.com , Dan Watson writes: The serial-numbered original manual was also included. Inside the plastic wrapping was an Austron catalog from 1988, complete with vintage smell! It is very interesting to look through. Attached is a picture of the spread for you Austron fans. Can we persuade you to all that stuff and uploade it to KO4BB or similar ? I'd love to get a chance to read it... -- 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 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] eLORAN test 6 Aug. Both Dana In. and wildwood nj
Picking up a strong signal here in North Carolina. My 2100F has been locked to Wildwood all morning. I'm using a 5' wire whip and a home brew preamp. Not hearing Dana yet. Dan On Aug 4, 2015, at 2:34 PM, paul swed paulsw...@gmail.com wrote: The Wildwood, NJ Transmitter will be on air from 0900 (EDT) 06 August until 1800 (EDT) 07 August. Wildwood will be broadcasting as 8970 Master and Secondary. The Dana, IN transmitter will also be on air intermittently during this time period. Dana will be broadcasting as 9960 Master and possibly other rates and stations as well. So at least 2 GRIs and at different locations. That will make it pretty interesting. Regards 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. ___ 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] 10MHz Square to Sine Wave Conversion
Hi, A while back I ordered an item of equipment from a very excellent eBay seller, johnkw40. He may be a member of the list, I'm not sure. He included a schematic for a low pass filter circuit to filter a 10 MHz square wave to a sine wave. A quick analysis shows that it is a 5th order chebyshev filter with a cutoff frequency of about 14MHz. You could do better, but this filter can be built with only five standard value passives, which is quite convenient. I made a little SMT version of it and ordered the boards on OshPark. It seems to work pretty well. The circuit schematic and a screen shot of the response is attached. Any comments from the list on how that looks would be welcome. Dan On Jul 16, 2015, at 10:49 AM, skipp Isaham via time-nuts time-nuts@febo.com wrote: re: 10MHz Square to Sine Wave Conversion The GPSDO I recently acquired outputs a 10 MHz square wave. I'd like to convert it to a sine wave and I am looking for suggestions and info re any reasonable pre-made circuits and/or boards. No sense reinventing the wheel if I can avoid it. Otherwise I will start Sent from my iPhone Thank you in advance for your replies. Regards, skipp skipp025 at yahoo dot 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 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] UrsaNav LORAN next test date
Paul, thanks for that info. Very interesting. I've been enjoying all of the Loran talk on the mailing list recently. I just picked up a NOS 2100F on eBay to play around with. Maybe I'll be able to do something useful with it one day if they continue with eLoran tests. Dan On Jul 15, 2015, at 1:17 PM, paul swed paulsw...@gmail.com wrote: I reached out to UrsaNav and asked when the next test would be. They were very responsive. Wildwood, NJ will be on air from 0900 (local) on 20 July until 0900 (local) on 23 July for an eLoran test. So fire up your Austrons and SRS units. There will be additional tests and they may be from different sites. UrsaNav plans to post the schedules on their site when it firms up. Regards 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. ___ 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] Any other useful purpose for Austron 2100F or SRS FS700 receivers in US
I saw in an article that there is an eLoran site online in NJ. Is that true? And if so, is there any backwards compatibility for the old Loran-C units? Dan On Jul 11, 2015, at 8:14 AM, James Robbins jsrobb...@earthlink.net wrote: Does anyone know of any other genuinely useful purpose to which the Austron 2100F, SRS FS700, etc receivers can be put in the US since the demise of Loran? Inquiring minds would like to know. Jim Robbins, N1JR ___ 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.
[time-nuts] New wrist watch
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.
Re: [time-nuts] Performance of 74LVC series ICs
Thanks for the replies! Very informative. Dan Sent from my iPhone On May 31, 2015, at 6:23 PM, Attila Kinali att...@kinali.ch wrote: On Sun, 31 May 2015 14:06:26 -0400 Dan Watson watsondani...@gmail.com wrote: Has anyone used or experimented with the 74LVC series of ICs? I have found them quite useful in projects. Supply voltage of 2-5V, and two inverters or a single gate or flip flip in a SOT package. They make for much cleaner layouts than large DIPs. Yes, quite a few of those. After CPLDs and FPGAs replaced all of the more complex 74xxx's, people realized that most projects do not need 4 NAND gates at one spot, but rather single ones here and there (a schmitt-trigger for signal conditioning, an AND gate to couple two enable lines,...). I'm wondering if they are acceptable replacements for 74HC, AC, etc in timing circuits. I have never used any of the LVC in a timing circuit, but i would guess they are not worse than the AC. Also they have the advantage of having single gates per package, which helps minimizing cross coupling between different signal paths. BTW: [1] may contain some interesting data for you. Especially as it compares different manufacturers too. Looking at [2], the ALVC family would probably be also worth a look. Attila Kinali [1] Low Voltage Logic Designers Guide, Ti, 1996 http://www.ti.com/lit/ml/scba010/scba010.pdf [2] Logic Guide, Ti, 2014 http://www.ti.com/lit/sg/sdyu001aa/sdyu001aa.pdf -- _av500_ phd is easy _av500_ getting dsl is hard ___ 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] 53132A Polish UHS Time Base Option Interesting Ovservation
And this is where one question leads to another. For an oscillator that is going to be used at very high velocities and accelerations, like in a missile, would it be calibrated somehow under the target G force? Or would you just compensate some other way? Or just not worry about it? Dan On May 12, 2015, at 6:51 AM, Bob Camp kb...@n1k.org wrote: Hi All OCXO’s are sensitive to acceleration. Gravity is one form of acceleration. A sensitivity in the 0.5 to 2 ppb / G is not uncommon. Bob On May 11, 2015, at 9:24 PM, J. L. Trantham jlt...@att.net wrote: I recently obtained a 53132A and added the HP Opt 010 High Stability Time Base option with a 10811 variant OCXO. I left it on for over a week and it, ultimately, seemed to slow down in its drift, with the displayed frequency, as it 'read' my GPSDO, slowly decreasing, suggesting that the Time Base was, slowly, increasing in frequency. I then removed the HP option and installed a Polish UHS Time Base option with a Morion DOCXO. After about 72 hours, it seemed to stabilize. I then 'calibrated' the 53132A by connecting my GPSDO to Channel 1. The displayed frequency was +/- 1 to 2 mHz of 10.000 000 000 MHz for the past week or so, with no drift noticeable. I had 'calibrated' the 53132A with it sitting at about +30 degrees, propped up on its 'handle' in a 'vertical' position. I then had occasion to move the 'handle' under the unit whereby the unit was 'flat', at which point the displayed frequency dropped to 9.999 999 997 MHz, +/- 1 to 2 mHz. The displayed frequency was the same this evening when I came home. When I again 'elevated' the unit by moving the handle to its more 'vertical' position, the displayed frequency moved to 10.000 000 000 MHz +/- 1 to 2 mHz. I'm not sure what this means. It is a 'repeatable' observation. It displayed the lower frequency all day and when I 'elevated' the 53132A this evening, the frequency again went to 10.000 000 000 Mhz. Is this a 'gravity' effect? Is this an issue with the DOCXO? Is this an issue with the 53132A? If I am correct in my calculations, the displayed frequency is +/- 1 to 2 parts in 10E-10 of 10 MHz, assuming my GPSDO is accurate and stable. Otherwise, the GPSDO and 53132A 'drift' is exactly the same. I would appreciate anyone's thoughts regarding this analysis and observation and how to go about 'quantifying' it in a more scientific method, assuming it's worth pursuing. Thanks in advance. Joe ___ 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.
