OK, will check the uBlox datasheet, until now I was assuming that the uBlox
series was capable of more than 1 fix per second in navigation and in
timing.
On Tue, Jan 31, 2012 at 3:17 AM, Didier Juges shali...@gmail.com wrote:
You have to spend good money to get a GPS receiver capable of
On Tue, 31 Jan 2012 10:26:15 +0100
Azelio Boriani azelio.bori...@screen.it wrote:
On Tue, Jan 31, 2012 at 3:17 AM, Didier Juges shali...@gmail.com wrote:
You have to spend good money to get a GPS receiver capable of calculating
it's time and/or position more than once per second. I am not
Hi Tom I seem to remember seeing a 5MHz standard in a triple oven at PO
Research in London were I worked in 1961. The crystal was made there and was
a 5MHz 3rd overtone and either a plano-convex or double-convex shape, I
believe. They had a lens grinding machine for generating the blanks. This
was
I did the mod and getting to pin 5 was tough. However Doug mentioned that
there is another point to the left of the chip thats easier to get to.
Don't recall the point. But if the lead ever comes off of 5 I can assure
you I will find it. :-)
My unit zeroed about at about 2 V. So I am using a 10 T
Tue Jan 31 14:15:57 UTC 2012
I did the mod and getting to pin 5 was tough. However Doug mentioned that
there is another point to the left of the chip thats easier to get to.
Don't recall the point. But if the lead ever comes off of 5 I can assure
you I will find it. :-)
My unit zeroed about at
On Mon, 30 Jan 2012 17:47:54 +
Mark Sims hol...@hotmail.com wrote:
The Tbolt does not have any sawtooth error or corrections.
Its' GPS receiver LO is generated from the 10 MHz oscillator.
That's what makes it the best GPSDO out there.
I just wonder, whether one could take a GPS
One of the recurring themes of our work over the past few years has
been synchronising web-based media with audio/video.
In this first of two technical blog posts on our recent work on P2P
Next, we explain why and how we implemented the HTML5 media element
attribute startOffsetTime in
What do you think you would gain from that. Does the LEA-6T have a TCXO?
Bert
In a message dated 1/31/2012 10:53:22 A.M. Eastern Standard Time,
att...@kinali.ch writes:
On Mon, 30 Jan 2012 17:47:54 +
Mark Sims hol...@hotmail.com wrote:
The Tbolt does not have any sawtooth error
On Tue, Jan 31, 2012 at 7:52 AM, Attila Kinali att...@kinali.ch wrote:
one could take a GPS module, like the LEA-6T
and replace the TCXO they have with a VCXO that is phase locked
to the 10MHz reference
I'm trying to figure out your goal. The above assumes one already
has a 10MHz
On Tue, 31 Jan 2012 11:46:45 -0500 (EST)
ewkeh...@aol.com wrote:
In a message dated 1/31/2012 10:53:22 A.M. Eastern Standard Time,
att...@kinali.ch writes:
I just wonder, whether one could take a GPS module, like the LEA-6T
and replace the TCXO they have with a VCXO that is phase
On Tue, 31 Jan 2012 09:32:22 -0800
Chris Albertson albertson.ch...@gmail.com wrote:
On Tue, Jan 31, 2012 at 7:52 AM, Attila Kinali att...@kinali.ch wrote:
one could take a GPS module, like the LEA-6T
and replace the TCXO they have with a VCXO that is phase locked
to the 10MHz
On Tue, 31 Jan 2012 09:32:22 -0800
Chris Albertson albertson.ch...@gmail.com wrote:
On Tue, Jan 31, 2012 at 7:52 AM, Attila Kinali att...@kinali.ch wrote:
one could take a GPS module, like the LEA-6T
and replace the TCXO they have with a VCXO that is phase locked
to the 10MHz
Thanks Arthur. Thats the thread I was referring to.
On Tue, Jan 31, 2012 at 10:25 AM, Arthur Dent golgarfrinc...@yahoo.comwrote:
Tue Jan 31 14:15:57 UTC 2012
I did the mod and getting to pin 5 was tough. However Doug mentioned that
there is another point to the left of the chip thats easier
Hi,
Has anybody investigated the internal connector at the end of the
board? It seems that it is only for factory tests/adjustments, but
probably there are interesting signals there. I will probe there but I
promised myself not power the unit again until I have a proper setup
(and after
On Tue, 31 Jan 2012 18:50:08 +0100
b...@lysator.liu.se wrote:
Let's say, i'm building a GPSDO with a high quality OCXO.
Wouldnt it then make sense to lock the reference clock of the GPS
receiver also to that OCXO?
Attila Kinali
Exactly that _is_ the appeal of the
On 31/01/12 03:17, Didier Juges wrote:
You have to spend good money to get a GPS receiver capable of calculating
it's time and/or position more than once per second. I am not aware of that
being done for timing applications, but it is available for navigation GPS
receivers, such as those used to
On Mon, Jan 30, 2012 at 11:46 PM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
So jitter can be many things and many values, all depending on what you do.
Indeed. Here's a mostly-from-textbooks view we use often for
synchronization systems in particle accelerators:
El 31/01/2012 20:43, Attila Kinali escribió:
My current progress is that the uC i wanted to use does not do what i
want. Can anyone recommend a uC with 32bit timers and IEEE 1588 support?
You can have a look on these
On Tue, 31 Jan 2012 20:43:35 +0100, Attila Kinali wrote:
My current progress is that the uC i wanted to use does not do what i
want. Can anyone recommend a uC with 32bit timers and IEEE 1588 support?
Some of the ST's supports IEEE-1588
On Mon, 30 Jan 2012 19:23:10 +, cfo wrote:
I just got my Prologix GPIB-ETH
I am 90% Linux Ubuntu based , and would like to get 99% based. So i am
looking for some C code examples, implementing the linux networking
part.
Thanx for all the suggestions , i'll have a look at porting
On Tue, 31 Jan 2012 21:06:04 +0100
Javier Herrero jherr...@hvsistemas.es wrote:
El 31/01/2012 20:43, Attila Kinali escribió:
My current progress is that the uC i wanted to use does not do what i
want. Can anyone recommend a uC with 32bit timers and IEEE 1588 support?
You can have a look
If you are willing to use external counters:
Dallas DS2423 Dual 32-bit Counter
Or, if you have an unlimited budget:
http://www.cwcelectronicsystems.com/dual32ct_modulario.html
the word defense is prominent here :-).
Or counter products from: http://www.lsicsi.com/
I use encoder interfaces from
In message deac00aacc21732c4705e34cd4097d7a.squir...@www.webmail.montana.com,
Don Latham writes:
want. Can anyone recommend a uC with 32bit timers and IEEE 1588
An suitable motherboard and an intel 82599 based ethernet card ?
The latter will set you back approx $700, but $1000 should get you
If anyone is interested, I have just got hold of a PDF of the Technical Manual
TM 5680-0211 for 5680A series Rubidiums.
Please contact me off list for a copy (1M, so too large to post on
time-nuts@febo.com)
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com
El 31/01/2012 21:47, Attila Kinali escribió:
This was exactly the device i intended to use.
But it doesnt really have 32bit timers. They cascade two 16bit timers
to get 32bit, but then all kind of restrictions apply which make the
timers unusable. And when using 16bit timers, i'll get an
On Tue, 31 Jan 2012 21:47:15 +0100, Attila Kinali wrote:
STM32-F2/F4 (ST): ST doesn't want to give me the documentation to those.
(website fails w/o error message)
I have no probs with the ST site (Discovery-F4)
http://www.st.com/internet/evalboard/product/252419.jsp
You want these for the
The Navsync FTS125 is an example where the GPS receiver engine (the CW25)
is driven by a 20MHz fixed OCXO. At the moment I don't know if the CW25 of
the FTS125 has a specific firmware for that but I suspect that it must be
so. In my opinion it is best to have a tunable OCXO (like the TBolt) to
It's a 5Mhz crystal with a frequency doubler at the output.
Dave
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On Behalf
Of cfo
Sent: 30 January 2012 17:25
To: time-nuts@febo.com
Subject: Re: [time-nuts] Racal-Dana 1991 w. Option 4C - what is
Does anyone else have problems with links to tf.nist.gov? When I try to
get the pdf's, I get no reply from the url at all. My browser puts out the
request, but gets no reply whatsoever and eventually gives up. This also
happened previously with this url
On Tue, Jan 31, 2012 at 9:40 AM, Attila Kinali att...@kinali.ch wrote:
Let's say, i'm building a GPSDO with a high quality OCXO.
Wouldnt it then make sense to lock the reference clock of the GPS
receiver also to that OCXO?
Yes, I see. That is exactly what Trimble does in the Thunderbolt.
Ken,
The links are working fine for me on our home network and our firewall is set
to medium/high security mode. Are you having the same issues with any other
.gov links?
Steve
On Jan 31, 2012, at 5:09 PM, ken johnson bats...@gmail.com wrote:
Does anyone else have problems with links to
On Tue, Jan 31, 2012 at 11:43 AM, Attila Kinali att...@kinali.ch wrote:
My current progress is that the uC i wanted to use does not
do what i want. Can anyone recommend a uC with 32bit timers
and IEEE 1588 support?
Does the system need to be small? If not Generic PC hardware can
work. Buy
Hi Folks,
We all know the issue of Android Devices that report GPS as UTC Time,
and all that goes with it. I do have TAI Clock installed, along with
UTC Clock and Navy Clock
Now.. Even though I have a Samsung S-2, what I'm really after is an
app that shows the following:
1) Local Device
Thanks for the reply Steve- yes, I can access nasa.gov and nist.gov ok, but
no matter which way I try, tf.nist.gov just will not reply to my browser's
request. It's not as if my firewall is stopping the reply, there is simply
no reply coming back. The url resolves to 132.163.4.169, and a whois
Ken,
I sent you an email with all three documents attached. Did you not receive
them?
.73,
Brent, KD0GLS, Minneapolis
On 31 Jan 2012, at 18:03, ken johnson wrote:
Thanks for the reply Steve- yes, I can access nasa.gov and nist.gov ok, but
no matter which way I try, tf.nist.gov just will
On Tue, Jan 31, 2012 at 4:02 PM, ken johnson bats...@gmail.com wrote:
Thanks for the reply Steve- yes, I can access nasa.gov and nist.gov ok, but
no matter which way I try, tf.nist.gov just will not reply to my browser's
request. It's not as if my firewall is stopping the reply,
It's their
On 31/01/12 17:00, David J Taylor wrote:
One of the recurring themes of our work over the past few years has
been synchronising web-based media with audio/video.
In this first of two technical blog posts on our recent work on P2P
Next, we explain why and how we implemented the HTML5 media
Rob, I would be happy to put it on one of my web pages so people could
download it.
On Wed, Feb 1, 2012 at 8:14 AM, Rob Kimberley
robkimber...@btinternet.comwrote:
If anyone is interested, I have just got hold of a PDF of the Technical
Manual TM 5680-0211 for 5680A series Rubidiums.
Please
On 31/01/12 07:27, Javier Herrero wrote:
El 31/01/2012 02:52, Magnus Danielson escribió:
On 31/01/12 02:20, Bob Camp wrote:
Hi
Simple answer is don't bother.
More complex answer - of course you can. You will get a forest of
spikes (every 5, MHz or so ).
Also, since the 5,3 MHz is
Let's say, i'm building a GPSDO with a high quality OCXO.
Wouldnt it then make sense to lock the reference clock of the GPS
receiver also to that OCXO?
Attila Kinali
It's a design decision. Most GPSDO sold are made by companies
that buy an OEM GPS timing receiver and then create a GPSDO
with
Hi Brent, yes I did thanks, but due to the slightly complicated way I have
to use to receive mail from the lists I am on, I replied to Steve's email
before I saw yours. Your efforts are are appreciated, I am going to enjoy
reading the files.
On Wed, Feb 1, 2012 at 11:07 AM, KD0GLS
Hi
It's not all smoke and mirrors. The Q of quartz goes up as frequency goes down.
Nobody really debates that. As frequency goes down blank diameter would need to
grow to keep everything same / same. Again not much debate.
What does get a lot of debate is just how small you can get blank
On Mon, Jan 30, 2012 at 6:17 PM, Didier Juges shali...@gmail.com wrote:
You have to spend good money to get a GPS receiver capable of calculating
it's time and/or position more than once per second. I am not aware of that
being done for timing applications, but it is available for navigation
On 01/02/12 01:29, Chris Albertson wrote:
On Mon, Jan 30, 2012 at 6:17 PM, Didier Jugesshali...@gmail.com wrote:
You have to spend good money to get a GPS receiver capable of calculating
it's time and/or position more than once per second. I am not aware of that
being done for timing
We're waiting for some brave soul to implement an SDR-based
GPS timing receiver; we can all then experiment with the TBolt
model instead of the TIC/DAC model of GPSDO.
There are several projects that do this.
There is one written using GNU Radio. I forget the details but I saw
it years ago.
On 31/01/12 20:43, Attila Kinali wrote:
On Tue, 31 Jan 2012 18:50:08 +0100
b...@lysator.liu.se wrote:
Let's say, i'm building a GPSDO with a high quality OCXO.
Wouldnt it then make sense to lock the reference clock of the GPS
receiver also to that OCXO?
Attila Kinali
On 31/01/12 22:14, Rob Kimberley wrote:
If anyone is interested, I have just got hold of a PDF of the Technical Manual
TM 5680-0211 for 5680A series Rubidiums.
Please contact me off list for a copy (1M, so too large to post on
time-nuts@febo.com)
I'll have it.
The russian version is here:
On 31/01/12 22:14, Rob Kimberley wrote:
If anyone is interested, I have just got hold of a PDF of the Technical
Manual TM 5680-0211 for 5680A series Rubidiums.
Please contact me off list for a copy (1M, so too large to post on
time-nuts@febo.com)
I'd ask off line but the quotes did not
Same here, rayxu...@gmail.com
Thank you
Ray Xu
On Tue, Jan 31, 2012 at 7:59 PM, Chris Albertson
albertson.ch...@gmail.comwrote:
On 31/01/12 22:14, Rob Kimberley wrote:
If anyone is interested, I have just got hold of a PDF of the Technical
Manual TM 5680-0211 for 5680A series Rubidiums.
Stranger still. I never received the first email and am interested.
Regards
Paul.
On Tue, Jan 31, 2012 at 9:15 PM, Ray Xu rayxu...@gmail.com wrote:
Same here, rayxu...@gmail.com
Thank you
Ray Xu
On Tue, Jan 31, 2012 at 7:59 PM, Chris Albertson
albertson.ch...@gmail.comwrote:
On
In the interim, here is a translation of the Russian manual.
http://translate.google.com/translate?hl=ensl=ruu=http://morion.com.ru/uploaded/FE-5680_manual_rus.pdf
Sam.
- Original Message -
From: paul swed
[mailto:paulsw...@gmail.com]
To: Discussion of precise time and frequency
DIY option for the 1992
I picked up mine as scrap. It did not have OCXO and the accuracy was terrible.
I had been watching some 'bay auctions and most suitable OCXO were going for
30-40$.. one Christmas I put in a minimum bid and since most of you were away..
I got one for $5.50 ! You need a
Sounds just fine to me, and at a great price.
Peter
On Jan 31, 2012, at 11:12 PM, Raj vu2...@gmail.com wrote:
DIY option for the 1992
I picked up mine as scrap. It did not have OCXO and the accuracy was
terrible. I had been watching some 'bay auctions and most suitable OCXO were
going
On 1/31/12 12:34 PM, cfo wrote:
On Mon, 30 Jan 2012 19:23:10 +, cfo wrote:
I just got my Prologix GPIB-ETH
I am 90% Linux Ubuntu based , and would like to get 99% based. So i am
looking for some C code examples, implementing the linux networking
part.
Thanx for all the suggestions ,
ken johnson wrote:
Does anyone else have problems with links to tf.nist.gov? When I try to
get the pdf's, I get no reply from the url at all. My browser puts out the
request, but gets no reply whatsoever and eventually gives up. This also
happened previously with this url
tf.nist.gov
Does anyone else have problems with links to tf.nist.gov? When I try to
get the pdf's, I get no reply from the url at all. My browser puts out
the
request, but gets no reply whatsoever and eventually gives up. This also
happened previously with this url
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