http://www.satsignal.eu/raspberry-pi/DigitalClock.html
third paragraph:
I've provided the source and binary files in this Zip archive, so
you can either run the program as-is, or modify it to suit your own
preferences.
On 10/3/2013 6:43 PM, Phil Genera wrote:
Is your code posted anywhere? I've
On 5/10/2013 9:52 PM, Ed Palmer wrote:
Part of me thinks it's cute, part of me wants to kill it. :-)
https://www.tindie.com/products/akafugu/vetinari-clock
Ed
Agreed...
I'm just thinking: Ah noo. Oww oww oww oww ma brainz!!!
Just the thought of being off by 250ms is upsetting
On 5/7/2013 2:00 PM, Sarah White wrote:
If you have problems with PPS, just set the serial port to a higher baud
rate... This is the reason I recommend against using the DCD line on the
same serial port you're using for TSIP
((snip))
On 5/8/2013 6:53 AM, mike cook wrote:
Sara, I'd
On 5/6/2013 9:38 AM, Chuck Forsberg WA7KGX N2469R wrote:
I would like to set up a NTP server on a machine running Linux
(currently Korora 18).
What are the requirements for the 1 PPS signal fed to the carrier detect
pin?
I presume the 10 us 1pps from the Thunderbolt is too narrow.
I assume
On 5/5/2013 6:35 AM, Miguel Barbosa Gonçalves wrote:
Hi fellow time nuts!
I've recently bought a Trimble Acutime gold that will be used as a
reference clock for a NTP server.
This receiver has the possibility of averaging it's position before
entering what Trimble calls the overdetermined
On 5/6/2013 12:29 AM, Mark Sims wrote:
The 48-hour precision survey in Lady Heather uses a statistical weighted
median filter to arrive at its final location instead of a simple average of
fixes. It processes data of one minute, hour, and overlapping 24 hour
intervals to calculate the
On 5/1/2013 8:43 AM, Stephen Tompsett (G8LYB) wrote:
http://www.theregister.co.uk/2013/05/01/hoptroff_shows_first_atomic_watch_movement/
Stephen, fellow time nuts,
[DISCLAIMER] I should really know better than to attempt internet
discussions or comments first thing after waking up. Didn't
On 5/1/2013 11:40 AM, Sarah White wrote:
On 5/1/2013 8:43 AM, Stephen Tompsett (G8LYB) wrote:
http://www.theregister.co.uk/2013/05/01/hoptroff_shows_first_atomic_watch_movement/
Stephen, fellow time nuts,
[DISCLAIMER] I should really know better than to attempt internet
discussions
On 5/1/2013 1:48 PM, Michael Tharp wrote:
((...snip...))
As for the article, The Register is not an outlet known for precise
reporting. Take it as a journalistic liberty.
NB: Your tweet is not visible to me, so it's somewhat difficult to
fact-check :-)
-- m. tharp
I deleted the tweet
On 5/1/2013 4:02 PM, Poul-Henning Kamp wrote:
In message 51815556.4050...@partiallystapled.com, Michael Tharp writes:
On 5/1/2013 11:40, Sarah White wrote:
Symmetricom doesn't go out of their way to say how the damn thing
actually works, [...]
NIST has documented that in a LOT of detail
On 4/16/2013 9:53 AM, Achim Vollhardt wrote:
Count me in as well, if you need another participating station. I have
my Thunderbolt running 24/7 with a solid stationary antenna..
I'm not sure what all I'll need to participate, but I'd like to
volunteer my thunderbolt to this sort of network as
On 4/16/2013 1:55 AM, Jim Lux wrote:
On 4/15/13 10:22 PM, Jim Lux wrote:
On 4/15/13 9:27 PM, Tom Van Baak wrote:
NIST SIM GPS common view pinwheel
described in one of the NIST reports as an aperture coupled slot fed
array that is better than a patch, but not as large and heavy as a choke
David,
Thanks for posting that. I'm currently doing some testing over wifi
links myself, and found that page very useful. You do a really good job
documenting your experiences with GPS-based NTP refclocks, and I
appreciate all the hard work.
I just wanted to ask though, are you compiling your
Bob Camp, Thursday, January 31 11:36 AM (Local NY time):
((...snip...))
With a good enough voltmeter you could carry the analogy one step further
and compute an ADEV like number on the output voltage. I suspect that's
carrying things a bit far.
No, I disagree. That's not carrying things nearly
On 1/25/2013 1:43 AM, David J Taylor wrote:
From: Sarah White
[complex instructions snipped]
--Sarah
P.S. sorry to double-post like this.
===
Sara,
It's far simpler to go into the Device Manger and disable the spurious
device, as described
On 1/24/2013 11:07 PM, Sarah White wrote:
(quotes)
NOTE: If you boot Windows with your ThunderBolt connected to the Com
port, Windows will think it is a serial mouse and grab the port. It
can lead to some interesting Windows behavior as the T-Bolt outputs
data.
Easy fix. Add
(quotes)
NOTE: If you boot Windows with your ThunderBolt connected to the Com
port, Windows will think it is a serial mouse and grab the port. It
can lead to some interesting Windows behavior as the T-Bolt outputs
data.
Easy fix. Add the following to your Boot.ini file. Obviously, the x
On 12/11/2012 10:33 PM, Charles P. Steinmetz wrote:
((...snip...))
I initially thought the third unit's oven controller was broken (low
gain). Then I noticed that the great majority of posted Lady Heather
plots appear to be from units similar to that one, with the much higher
tempco and
On 12/21/2012 1:52 AM, Said Jackson wrote:
Can you create an executable for windows?
Thanks,
Said
python is a script-type language which runs on top of the python engine
(almost similar to how java programs run on a java engine)
... to answer your question: yep, you can download here:
Sorry, this is off-topic:
Wondering I'm if anyone else had part of this particular conversation /
thread (Synergy SSR-6TR) sent to their spam folder or otherwise filtered?
From what I suspect, it was just a false-positive, as the conversation
didn't appear to be spam, wondering if the word
On 12/11/2012 10:33 PM, Charles P. Steinmetz wrote:
All three have Trimble 37265 OCXOs
(( sorry to single out that one line ))
Just a curiosity. Is there any way to check that via software? Did you
just physically look under the cover, or how did you figure out which
type of oscillator your
Ended up with a gently used trimble thunderbolt a few months ago, and
been trying to figure out the best settings to use (time constant,
damping, etc.) for best performance.
I got distracted though. There is something which I find rather
annoying, and I'm spending more time messing with this
On 12/10/2012 5:22 PM, Bob Camp wrote:
Hi
The oven in the OCXO keeps the crystal at a constant temperature. It is
normal for the TBolt it's self to idle 10 to 20C above ambient. The
temperature sensor is located near the 9 pin D connector. It shows a
temperature somewhere in between the
On 12/10/2012 6:10 PM, Arthur Dent wrote:
I believe that the high temperature alarm you see is triggered at 50 degrees
C. If that is what you're seeing without artificially raising the
temperature
of the Thunderbolt by insulating it so it can't radiate the heat, what I said
about
Has anyone ever used a TAPR clock block or other frequency synthesizer
to sort the clock drift / timing problems on a regular computer? I'll
probably end up with a used dell or IBM workstation for this purpose.
Recently, I came across a low-cost frequency synthesizer capable of
using a 10mhz
On 11/30/2012 6:30 PM, Eric Garner wrote:
the actual RTC on modern (Intel based) PC's is driven from a standard
32,768 Hz crystal attached to the PCH. some of them are in incredibly small
packages now instead of the old tuning fork-in-a-can ones. peeling off the
load caps and crystal from the
On 11/30/2012 7:54 PM, John Ackermann N8UR wrote:
On Nov 30, 2012, at 7:10 PM, Sarah White kuze...@gmail.com wrote:
On 11/30/2012 6:30 PM, Eric Garner wrote:
the actual RTC on modern (Intel based) PC's is driven from a standard
32,768 Hz crystal attached to the PCH. some of them
On 11/30/2012 7:58 PM, John Ackermann N8UR wrote:
On Nov 30, 2012, at 7:42 PM, John Ackermann N8UR j...@febo.com wrote:
In this case, you're not looking for the RTC but rather the clock that
drives the COU
Read CPU. Stupid iPad keyboard.
I use MessageEase on my android smartphone. The
oops sorry that was supposed to be reply to sender not to list. Sorry sorry.
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http://inkushi.freeshell.org/screenshot-1351958570177.png
^See? Hence my filing a bug report a few hours ago.
On 11/3/2012 8:54 PM, Brent Gordon wrote:
Reykjavík, Iceland is UTC+0 without summer time changes.
Brent
On 11/3/2012 9:55 AM, Sarah White wrote:
P.S. Seems strange
On 11/3/2012 5:32 AM, Sarah White wrote:
So, at or around 1981 (the year I was born) there was a cool concept.
IBM was selling personal computers (IBM-PC compatible later became a
thing) and by the time I was old enough to operate a modem, I had one
myself. Life was good.
Wonder
On 11/3/2012 8:02 AM, Edgardo Molina wrote:
Dear Sarah,
Good morning. I just returned home from a long and difficult customer data
center migration. I thought of sharing that I feel the same way as you do
regarding your thread. Things should always behave like a Mac or Linux, in
which if
On 11/3/2012 8:26 AM, WB6BNQ wrote:
Sarah,
I am having a hard time understanding your problem. Or at least what you see
as
a problem. I am not sure what you are really complaining about here ? Is it
the
daylight change ? Or is it a dual boot problem which would suggest you do not
On 11/3/2012 9:18 AM, David J Taylor wrote:
-Original Message- From: Sarah White
[]
Seeing as I'm in the process of installing a hardware refclock (trimble
thunderbolt connected via serial port) for my NTP, it is highly
problematic and potentially error-prone for microsoft's OS
On 11/3/2012 11:31 AM, David J Taylor wrote:
-Original Message- From: Sarah White
Sent: Saturday, November 03, 2012 9:49 AM
Thanks so much David...
Really. Thanks. I feel alot better now.
Regardless of documented issues on:
http://www.cl.cam.ac.uk/~mgk25/mswish/ut-rtc.html
On 11/3/2012 3:12 PM, David J Taylor wrote:
-Original Message- From: Sarah White
Great, thanks for the loopstats.
For the included loopstats, I believe Alta was among the ones on which
you were running windows 7 + NTP... Would you mind confirming which
setting you have for your
at several of my clocks today,
Sarah White
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with
the 700mhz raspi.
hope this helps,
Sarah White
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and follow the instructions there.
, the NTP / SNTP protocol isn't nearly as high performance as
Precision time protocol --- PTP is the latest technology to come out
of the network time foundation, and NTP protocol has simply been
around longer and as such, it is better known:
http://networktimefoundation.org/projects/
regards,
Sarah
On 10/17/2012 12:31 PM, Chris Albertson wrote:
On Wed, Oct 17, 2012 at 12:50 AM, Sarah White kuze...@gmail.com wrote:
Hi again everyone :)
Originally I was hoping for a thunderbolt. The control / diagnostic
software looked cool, but I couldn't afford the pricetag on one.
...Here's my
On 10/24/2012 6:47 PM, Magnus Danielson wrote:
Fellow time-nuts,
When spending time on a conference last week, I heard one interesting
comment that they lost data due to bad timing on their Windows servers.
Now, I know that the standard Windows uses SNTP in order to achieve the
goal of
(( replied at beginning to be consistent with this thread ))
Thanks, this has done a good job at furthering my understanding about
error (one way of describing adev as I understand) vs short and long
tau times. I don't have anything to add on that subject, but but I have
a question about a page
On 10/21/2012 12:39 PM, Attila Kinali wrote:
On Sun, 21 Oct 2012 18:02:40 +0200
Magnus Danielson mag...@rubidium.dyndns.org wrote:
Ah, but this is Time-Nuts.. are you sure you don't need 1E-13
performance? You may not think you do today, but inevitably, the
horrible uncertainty in your time
On 10/21/2012 1:13 PM, Magnus Danielson wrote:
Dear Sarah,
On 10/21/2012 06:48 PM, Sarah White wrote:
I would better appreciate that list of information if I confidently /
specifically knew how to access any of it. Any chance you have links to
the helpful information-type things you just
I've done enough reading to know that continuing to use this navigation
(NOT timing mode) GPS is not an option.
Initially, I was pleased to find out that the old RS232 (serial) ---
USB adapter I pulled out of storage uses the same prolific 2303
USB-serial driver
... At least at first I was.
-for-computers-laptop-worked-as-gps-navigator_p46411.html
AGI-G217 USB GPS Receiver
((...snip...))
^copied from other thread:
Followup (still want a GPS-type NTP refclock)
Thanks again,
Sarah
On 10/20/2012 2:05 AM, Sarah White wrote:
I've done enough reading to know that continuing to use
On 10/20/2012 7:48 AM, Azelio Boriani wrote:
Usually a crimp type DB9 can be wired directly to the crimp type IDC
connector, leaving out the pin 10 of the IDC, it is missing in the header.
But, yes, better to test as indicated by Peter.
((...snip...))
o - This pin should be ground
o o
On 10/20/2012 10:06 AM, Bob Camp wrote:
Hi
The IDC to 9 pin cables are a generic / cheap item on eBay or from Newegg.
Less than $3 delivered last time I needed any.
Bob
((...snip...))
Motherboard manual said:
Connect one side of a switching cable to the header and then attach the
serial
On 10/20/2012 11:56 AM, Dennis Ferguson wrote:
On 20 Oct, 2012, at 02:05 , Sarah White kuze...@gmail.com wrote:
Page 15, there is a yellow 10 (9) pin header, and page 26 was what I
quoted. Really wish there was more information... I've had this
motherboard for something like 5 years
talking about in this thread / earlier
post... These can KINDA be found for less than $100 and I'm starting
to think that's probably as far down as low cost can get for timing
mode.
((digitally signed))
Sarah White
-BEGIN PGP SIGNATURE-
Version: GnuPG v2.0.17 (MingW32)
Comment: Using GnuPG
On 10/18/2012 1:20 PM, saidj...@aol.com wrote:
Let the GPS average the antenna position over a very long time.
On a good GPSDO one can select the number of averages, and the position
variance before the survey is finished, and the (now very precise) position
is
stored in memory.
? Not quite sure based on a few
seemingly conflicting statements I've seen from diferent vendors.
Are these iLotus M12M basically aftermarket motorola oncore?
That's all I guess.
((digitally signed))
Sarah White
- --- Original post quoted below ---
Date: Sun, 19 Aug 2012 00:25:51 -0400
From
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Wed, Oct 17, 2012 at 12:50 AM, Sarah White kuze...@gmail.com wrote:
((...snip...)) -- my post was long. Sorry hehe.
1) iLotus M12M timing mode GPS (serial port version) 2) Aprox 10
meter antenna cable with apropriate connector(s) 3) active
reason I'm on this list. Some day I might be good enough with
all this tech, such that I could act as a consultant on the subject...
For now though, I'm enjoying the learning experience(s)
Thanks everyone :)
((Digitally Signed))
Sarah White
-BEGIN PGP SIGNATURE-
Version: GnuPG v2.0.17
)
That's navigation... Timing mode only needs 1 satellite lock after
all, and I suspect I will at minimum be able to get needed 1
satellite lock with nearly any active GPS antenna.
((digitally signed))
Sarah White
-BEGIN PGP SIGNATURE-
Version: GnuPG v2.0.17 (MingW32)
Comment: Using GnuPG
used for above calculations
would be relative to the position of the antenna? I read somewhere that
even compensating for the length of the antenna cabling is important?
This is all so exciting. Thanks everyone.
On 8/21/2012 2:01 AM, Chris Albertson wrote:
On Mon, Aug 20, 2012 at 3:10 PM, Sarah
Wow. Okay. The user manual actual considers this cable delay to be worth
mention?
I can see why the trimble thunderbolt is a favorite among time nuts 3
I'm sold.
On 8/21/2012 12:48 PM, Chris Albertson wrote:
On Tue, Aug 21, 2012 at 9:35 AM, Sarah White kuze...@gmail.com wrote:
Thanks Chris
on a single satellite lock
(before falling back on the ovenized crystal in pure holdover mode)
... Is that a common feature? Know of any good ones other than the
trible thunderbolt?
On 8/20/2012 5:07 PM, cfo wrote:
On Sun, 19 Aug 2012 15:29:22 -0400, Sarah White wrote:
oh wow, thanks. I'll try
my iPad
On Aug 18, 2012, at 11:25 PM, Sarah White kuze...@gmail.com wrote:
Hi, this is my first post.
First off. Windows 7 USB connection to the GPS (no serial ports / modern
computer) and I'm pretty sure that is my main problem.
Past few months, I've been trying to figure out my timing
If your design gets off the ground, I'd surely try to replicate it from
your part list or buy a kit from you or whatever. Sounds great.
On 8/19/2012 2:19 PM, Michael Tharp wrote:
On 08/19/2012 01:38 PM, Chris Albertson wrote:
NTP is not as easy as you think. Just doing the cryptography to
) into local time on computer(s)
(Sarah White)
2. Modern motherboard with RS232 port (Stan, W1LE)
3. Re: L1 GPS timing signal(s) into local time on computer(s)
(KD0GLS)
4. Embedded NTP servers? (Michael Tharp)
5. Re: Modern motherboard with RS232 port (Chris Albertson
Ed:
you're sorta right, but only on a really basic level of electrical
engineering.
Induction and capacitance and random transformer magnetic flux nonsense
that makes AC currents act in unexpected ways. The difference between
volt-amp versus RMS watt versus peak watts, etc, etc. can be off by
Hi, this is my first post.
First off. Windows 7 USB connection to the GPS (no serial ports / modern
computer) and I'm pretty sure that is my main problem.
Past few months, I've been trying to figure out my timing issues. Lots
of reading trying to figure out how to best configure everything. I'm
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