On LoranView (http://www.df6nm.bplaced.net/LoranView/LoranGrabber.htm) you can
easily see various outages on Anthorn beginning at about 1500Z 4-Jan.
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Looks like Sylt went off-air in addition to the Norway and France stations.
Perhaps it is not a permanent decommissioning.
http://www.jks.com/signals/loran/LV.shutdown1.jpg
The above capture from the Loran-C Live Grabber site of Markus Vester, DF6NM:
8000, 5990, 5960, 7950 (Russia)
> 8830 (Saudi)
> 6000, 6780, 7430, 8390 (China),
> 9930 (Korea)
> 8970 (USA occasionally)
>
> All the best,
> Markus (DF6NM)
>
>
>
> -Ursprüngliche Mitteilung-
> Von: John Seamons <j...@jks.com>
> An: m
Hi group,
Please email any follow-up to me directly, and not to the list, unless it is
relevant to the GPS aspect.
My little GPS / SDR add-on board project for the BeagleBone Black (GPS
front-end + FPGA + ADC) is ready for first PCB fab. But I'd like to get some
feedback on the design before
On Dec 17, 2014, at 1:38 PM, Jim Lux jim...@earthlink.net wrote:
but there probably are some software receivers (open source?) out there..
I'll add to the list:
Fellow time-nut Peter Monta's GNSS Firehose
http://pmonta.com/blog/2014/06/17/new-gnss-firehose-board/
On Oct 18, 2014, at 3:48 PM, Mark Sims hol...@hotmail.com wrote:
It is rather interesting that well over half have gone international …
Agreed. I have shipped processor boards to Canada, UK, Netherlands, Denmark,
Sweden, Spain, Germany, Australia, Brazil, Italy and maybe South Africa if
On Oct 8, 2014, at 8:00 AM, Chuck Harris cfhar...@erols.com wrote:
Is removing the HPIB connector the way?
Is anyone making a replacement panel that has a USB
and an RJ connector mounted?
I have looked into the mechanical issues of doing that, but haven't done a PCB
layout yet.
My plan
On Oct 8, 2014, at 6:46 AM, Chuck Harris cfhar...@erols.com wrote:
Can you share with the group any interesting applications this
new processor board has enabled?
I haven't done much of interest beyond the high speed binary-mode-over-Ethernet
hack (about 39K meas/sec last time I checked). I'm
Boards from the second build of the 5370 processor replacement board project
are now available.
Details here: www.jks.com/5370/5370.html
Please email me off-list with any non general-interest questions.
Thanks,
John
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Please excuse this commercial announcement (although it's still a near-zero
profit project).
There has been enough accumulated interest for me to consider doing a second
build of the 5370 processor replacement boards.
If you are interested, but have not previously done so, please fill-out the
On Aug 10, 2014, at 5:49 AM, Brooke Clarke bro...@pacific.net wrote:
I don't understand how Xtendwave can get patents when their work was
partially funded by NIST?
We had this discussion a few years back:
http://www.mail-archive.com/time-nuts%40febo.com/msg51742.html
If you're looking for example code that uses the BeagleBone PRU: The 5370
processor replacement project https://github.com/jks-prv/5370_proc uses the
PRU to meet real-time requirements accessing the 5370 and Beagle GPIOs
(basically, by staying away from Linux). The code shows how to communicate
On Mar 2, 2014, at 6:20 AM, Brian Lloyd br...@lloyd.com wrote:
Instead of using the external reference input, any thoughts on actually
disciplining the internal OCXO to bypass the problem?
I almost put a GPS front-end chip and small FPGA on the 5370 board. You can
imagine where that idea was
On Mar 2, 2014, at 7:05 AM, Pete Lancashire p...@petelancashire.com wrote:
Idea. On the next go around for the board put the copper down and holes for
a couple small daughter cards and any support logic needed to interface
with the BBB.
The the only additional cost would be limited to the
On Feb 28, 2014, at 4:34 PM, Bob Camp li...@rtty.us wrote:
Is there any performance data on how the card does with a 5370A and / or a
5370B compared to the original CPU on the exact same box? Put another way -
does the counter get better or worse with the new card? I realize that an A
On Feb 25, 2014, at 12:59 PM, John Seamons j...@jks.com wrote:
I may have a solution for the power-off problem that doesn't involve
batteries or supercaps. It has the added advantage of providing instant-on.
From the latest documentation:
One solution to the annoyance of having to halt
Please excuse this commercial announcement (although it is a near-zero profit
endeavor).
I am now accepting general orders for the hp 5370 processor replacement board.
More info and ordering information at: www.jks.com/5370/5370.html
___
time-nuts
I may have a solution for the power-off problem that doesn't involve batteries
or supercaps. It has the added advantage of providing instant-on. I need to run
some tests..
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As a starting point: Here's an extension of the SAQrx PC sound card receiver
that supports 192 KHz sample-rate sound cards. Enough to get you WWVB.
https://sites.google.com/site/swljo30tb
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https://github.com/jks-prv/5370_proc
Source code, documentation, Gerbers, BOM, KiCAD schematic and PCB layout. I'm
new to github so please let me know of any screwups.
I decided to pull the USB isolation stuff off the board since it's pricey and
uncertain when it might be working with the BBB.
Okay, the board has been spoken for. Thanks for your interest.
I will soon post gerbers and source so you can build one yourself if you want.
We should also figure out how to get a larger number of boards made if there is
sufficient interest.
___
Since I'm getting a bunch of replies let me ask that you please answer a
question in your emails.
Please indicate:
1. Just publish the gerbers and source and I'll deal with it myself.
2. I want to buy a blank PCB (no components).
3. I want to buy a finished PCB and I'll
Please do not reply to the list -- send me an email.
I need one (just one) additional beta tester for the hp5370 processor
replacement project: http://www.jks.com/5370/5370.html
Ideally you'd be able to write some C code that extends the instrument to do
something interesting for the time-nuts
For your amusement: http://www.jks.com/sdgps/sdgps.html
A version of Andrew Holme's SD-GPS built using a BeagleBone Black + LX25 FPGA +
SE4150 GPS front-end chip.
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On Sep 13, 2013, at 6:03 AM, David Hooke wrote:
Does anyone have a secret stash of the RMB A.03.0x version?
I don't have that. But what I do have that might be of interest to someone is
the source code (BASIC) for the older 3047A system (11740A/35601A). I have
uploaded it to KO4BB (give
On Sep 5, 2013, at 9:05 AM, Tom Van Baak wrote:
Hi John,
It's not off-topic at all. Thanks for posting. Someday it would be cool if an
amateur precise time project emerged from this effort.
What is not clear from your link is the accuracy or stability of the LO that
was used. It seems
Somewhat off-topic but it might help someone out: I've had a tough time
finding, and using, files on the net containing raw GPS signal samples to be
used with the various software-only (or software-mostly) GPS receivers out
there. I finally got a file of data that works and have have posted it
http://www.fhwa.dot.gov/publications/publicroads/01septoct/gwen.cfm;
http://www.navcen.uscg.gov/?pageName=SiteLocations;
http://www.navcen.uscg.gov/pdf/ndgps/DGPS_Site_Table.pdf;
The only ones I know for a fact were former GWEN sites are Essex CA and ABQ NM.
I can hear 29 +/- of these with an
I can't seem to remember it's angle brackets you use to quote a url. Sorry
about that for those of you reading on the archive and getting bad links. Try
below:
On Jul 15, 2012, at 1:42 PM, John Seamons wrote:
http://www.fhwa.dot.gov/publications/publicroads/01septoct/gwen.cfm
http
Even the LHC doesn't trust leap second effects.
A slide from Friday morning's status report:
https://dl.dropbox.com/u/68809050/2012.06.29-830meeting.pdf;
(start-up referring to the recovery from this week's technical stop)
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It appears that, like last month's test, the phase data pattern transmitted is
constant and repeats every minute. The pattern is different than last time
however:
+-- sec 0
v
April 15 2012
1001100101 010011 111000 1110101100 0010111000 1101101000 -- sec 59
101100 100111
On Apr 14, 2012, at 7:05 PM, Jim Hickstein wrote:
Did they start early? Both my Spectracom 8164 and 8170 are unlocked. I was
expecting this, but not before 0130Z.
The transmitter went off-air starting at 0100Z. Back on now at 0130 presumably
with PSK. I'm recording, but haven't done any
On Mar 20, 2012, at 4:18 AM, Peter Monta wrote:
John, if you're reading this, would your receiver be capable of
recording with wider RF bandwidth? Your recordings made during the
test period have a bandwidth of about 30 Hz; can it go any wider? I
think your web page says you're using an
On Mar 16, 2012, at 1:32 AM, Peter Monta wrote:
Attached are some more renderings of John Seamons' WWVB data. This is
what one might expect from a receiver that knows when the phase
reversals happen and takes them out noiselessly---re-reversing the
out-of-phase bursts to recover
Here is a copy of the paper NIST co-authored describing the new WWVB phase
modulation format:
http://jks.com/wwvb.pdf (2MB PDF)
John Lowe from NIST said I could redistribute it to the list. It will be
available on the NIST website sometime in April once the official PTTI 2011
On Mar 9, 2012, at 4:28 PM, Peter Monta wrote:
Interesting that WWVB is running a phase-modulation test---thanks for
the links. Is the signal format known? A quick search shows nothing
specific, just we're testing.
Could someone record a few minutes of the broadband signal so that
those
On Mar 11, 2012, at 12:53 PM, John Seamons wrote:
I took a look at this. Pictures and video here: http://jks.com
I believe what they were doing is applying a simple 180 deg phase shift to
the carrier (BPSK) during certain one second timecode intervals.
Whether there was anything fancier
On Jul 25, 2011, at 2:32 PM, Tijd Dingen wrote:
A quick check shows digikey sells them in single quantities, and has current
stock.
Good news. I hadn't checked for five months, but maybe my original search was
faulty. Funny that they're $1.40 more expensive than the microcontroller ($10
vs
On Jul 24, 2011, at 12:32 AM, Poul-Henning Kamp wrote:
I would worry a bit about the PLL locking too, but I have no idea how
to actually measure it.
I think the 1sec max gate-time is related to the eventcounter width,
but it might be possible to simulate a wider counter in software.
The
On Jul 24, 2011, at 11:18 AM, paul swed wrote:
Took a look at your setup and bench. So the support for the 5370 in a HP
vector network analyzer. Now thats some support. :-) I might tend to have
the two flipped in the stack.
So you are suggesting the potential to make this operational to a
On Jul 24, 2011, at 2:40 PM, Poul-Henning Kamp wrote:
Ethernets big advantage is that it is galvanically isolated, USB is not.
You had mentioned this issue in February. And since I currently flash using USB
I went ahead and bought the evaluation card for the Analog Devices ADuM4160
Some progress since February's discussion:
My m6800 emulator running the 5370 firmware has been moved from the Linux box
to a little 32-bit microcontroller on it's own small evaluation-kit board.
Pictures here: http://jks.com (click on images for larger versions)
You talk to it over an Ethernet
Have you tried going through the various checkout procedures in the manual
to make sure they all still work? If the 5370 firmware authors *didn't*
bake some timing dependencies into that 6800 code, they were the exception.
Of course, if your emulator is cycle-for-cycle faithful to the 6800
Perhaps an AT91SAM7SE512 - it has an external addr/data bus, with quite
flexible configuration, and USB - but no Ethernet :)
Regards,
Javier
One thing I like about the SAM7X512 (and others) is that in exchange for giving
up the external bus interface you get USB -and- Ethernet. The m6800
On Feb 21, 2011, at 10:38 AM, Poul-Henning Kamp wrote:
In message a9edf64f-c7a2-4679-9f69-a9395b1a0...@jks.com, John Seamons
writes:
It's bad enough to have to solder a single LQFP-100..
Why even try ? There are plenty of good eval boards from olimex.com
(sparkfun.com in the USA
Well the hard part (or maybe the fun part) is still to come.
I wasn't going to talk about any of this until I had a board to sell, but this
thread sort of forced the issue, lol.
On Feb 21, 2011, at 12:14 PM, jimlux wrote:
On 2/20/11 8:55 PM, John Seamons wrote:
I've been looking at this a bit
I've been looking at this a bit recently.
Pictures here: http://jks.com
I run the 5370 firmware on an m6800 emulator written in C running on a Linux
box.
Reads and writes to I/O space are caught and executed on the 5370 hardware via
an interface board hooked up to the m6800 processor bus.
This
I have the 3047a BASIC firmware files (dated 1/16/1986) that were coded to
run on the hp 9835 calculator and control the 3582/3585/35601 over HPIB.
Some kind soul sent them to me over 10 years ago after I had acquired a
35601a.
The plan was to whack it for IBASIC in the 4395 SA and display the PN
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