-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Steve Rooke
> When I communicate with the US, I have to work out which time-zone the
place I'm talking to
> is in and correct for that. It's probably not so much of a problem for
someone in America
> as yo
Hi guys,
fyi: a Wavecrest DTS-2077 is available from someone for $5 on Ebay. That's
the high-end unit with 1.3GHz range.
item: 120326604028
Seems they have a matching arm generator.
bye,
Said
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Hi Tom,
that particular unit is a 270 MTI.
The jump was about 29ns before the loop pulled it back, this is a bit more
than what I would expect on this OCXO with vibration induced noise.
The user has tried before to see if vibration is an issue, it was not some
time ago.
bye,
Said
In
OK, if no one was around that lessens the chance of vibration. Still, I didn't
want to rule that possibility out. Some of my oscillators are very sensitive to
any sort of shock. Even to the point of becoming crude seismometers.
I found with shock, they don't always return back to normal; i.e., i
Hi Tom,
that's possible, this particular unit has been jumping all along, even at
night when no one is in the office. Usually it's not just one jump, but a
series
of jumps. A mechanical bump would usually result in a disturbance, but not a
permanent change in the EFC voltage.
The unit is
> This jump will be visible online for a couple more hours today.
>
> While it looks very nice, these jumps are not what we want to see of course.
Said,
What environment is this GPSDO in? Is there any chance
that it is on a table or bench or rack shelf that got moved or
even slightly bumped at
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Tom Van Baak
> Sent: Thursday, October 30, 2008 5:06 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] What's the time Mr Wolf...
>
> > This may not directly answe
Hi guys,
there is a very nice Crystal jump visible online today:
_http://resco.ucol.mx/Fury/gpsstat.htm_
(http://resco.ucol.mx/Fury/gpsstat.htm)
Has anyone else seen a similar effect today?
This jump will be visible online for a couple more hours today.
While it looks very nice, thes
2008/10/31 Magnus Danielson <[EMAIL PROTECTED]>:
>
> What's this AM and PM stuff got to do with it. You mean you would go up
> at 19 rather than 7?
Indeed it does mean that, and the 12 hour shift in time works for NZ
as compared to UTC because we are pretty close to 180 deg longitude
away from Gre
2008/10/31 Tom Van Baak <[EMAIL PROTECTED]>:
> http://www.physicstoday.org/vol-59/iss-3/pdf/vol59no3p10_11.pdf
>
> Hal, and James, see my follow-up to Kleppner's article...
>
>
> http://ptonline.aip.org/journals/doc/PHTOAD-ft/vol_60/iss_3/16_1.shtml
> http://link.aip.org/link/PHTOAD/v60/i3/p16/s1
2008/10/31 Hal Murray <[EMAIL PROTECTED]>:
>
> This may not directly answer any of your questions, but it sure is a fun read.
>
>* Time Too Good to Be True, Daniel Kleppner
> Physics Today, March 2006, page 10
>
> HTML version (needs cookies):
> http://scitation.aip.org/error/cookies.jsp?u
> This may not directly answer any of your questions, but it sure is a fun read.
>
>* Time Too Good to Be True, Daniel Kleppner
> Physics Today, March 2006, page 10
>
> HTML version (needs cookies):
> http://scitation.aip.org/error/cookies.jsp?url=http%3a//scitation.aip.org/jour
> nals/d
Chuck Harris wrote:
> With the great ease of computers to make the transformations,
> there really isn't any point in removing local timezones. It
> is just a table after all... it is nothing like the old days when
> every major town used Local Sidereal Time (eg. 12:00 is when the
> sun is at its
Just received this OCXO from mr. fluke in China. Took exactly 14 days
from time of order to get here to W. Washington. Hooked it up like
the Isotemp 134 diagram. He said it would work, and it works perfectly.
The Isotemp spec EFC voltage range (positive slope) is 0 to the ref.
voltage, in my
Steve Rooke wrote:
> Hi,
>
> I've been under the radar for a while so have not been able to keep up
> with the threads I was contributing to but that has been done to death
> and I will drop them. I've been very interested in reading peoplels
> thoughts on time-zones. Has there been any moves to a
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Hal Murray
> Sent: Thursday, October 30, 2008 4:35 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] What's the time Mr Wolf...
>
>
> > Thanks for your understandi
> Thanks for your understanding and useful pointers, this is exactly
> what I was referring to. If you don't know where to start, it's not
> always easy to get to the goal.
This may not directly answer any of your questions, but it sure is a fun read.
* Time Too Good to Be True, Daniel Klep
Hi,
1. connect as shown on the Quick Start Signal Source.
2. Signal source ON,
3. select Frequency Modulation,
4. press Autoscale.
This should give a sine on the display.
Does this work? If yes I will make a scan of the manual.
My Quick Start Signal Source is still alive.
How about your eprom?
re
As I recall, the lunar gravity force is on the order of a few ppm of "g" (and I
assume solar force is comparable).
So, the period of a pendulum does vary according to the time of day and phase
of moon. (about a ppm or so)
I seem to recall that acceleration sensitivity of a crystals is on the or
> The tidal effects are much smaller than those from position. I don't
> think that these effects are visible at the 10-14 or 10-15 level, but
> since I don't know what level they are visible at, I can't be sure.
> I'm sure that someone on this list, maybe as part of their PhD thesis,
> has measur
In message: <[EMAIL PROTECTED]>
"Steve Rooke" <[EMAIL PROTECTED]> writes:
: 2008/10/31 Tom Van Baak <[EMAIL PROTECTED]>:
: >
: >> 11) Extrapolating this, a point on the Equator would be moving faster
: >> that a point at the poles or even Greenwich, for that matter. So would
: >> a cloc
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Chuck Harris
> Sent: Thursday, October 30, 2008 12:09 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Time-zones and World time..
>
> As I recall, Local Solar T
As I recall, Local Solar Time is also known as Apparent Solar Time, and
is defined as when the sun reaches its highest point over some local
meridian of interest (town hall?).
That point in time is called 00:00:00... Which sort of makes sense because
you can directly observe high-noon, but midnigh
2008/10/31 Chuck Harris <[EMAIL PROTECTED]>:
> With the great ease of computers to make the transformations,
> there really isn't any point in removing local timezones. It
> is just a table after all... it is nothing like the old days when
> every major town used Local Sidereal Time (eg. 12:00 is
> If gravity affects frequency, can this effect be seen as a daily
> change in the EFC voltage of a GPS locked standard as caused by the
> Moon? Does this also affect the frequency of the atomic standards used
> to measure time? All this must make the measuring of absolute
> frequency to the high o
Local Solar Time noon would still be 12:00:00.
If I remember correctly, the one that has noon as 00:00:00 is Astronomical
time (e.g. GMAT).
Cheers
Dave
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Chuck Harris
Sent: 30 October 2008 18:49
To: Discussion
Hi Steve;
I think God decides the time the fun parts is watching humans try to
sort it out.
Currently the World has accept a specific number of vibrations
(9,192,631,770) of a Cesium-133 atom to define one second. For the USA
the master clock F1 is in Colorado and although the GPS sat's are
David Forbes wrote:
> At 9:42 AM -0400 10/30/08, Chuck Harris wrote:
>> With the great ease of computers to make the transformations,
>> there really isn't any point in removing local timezones. It
>> is just a table after all... it is nothing like the old days when
>> every major town used Local
2008/10/31 J.D. Bakker <[EMAIL PROTECTED]>:
> At 02:09 +1300 31-10-2008, Steve Rooke wrote:
>> it's not always easy to formulate a
>>phrase to trigger the answer required out of Google and which sources
>>should I go to or believe.
>
> Fair enough. For your first six
Thanks for the very informative reply Tom.
2008/10/31 Tom Van Baak <[EMAIL PROTECTED]>:
>
>> 11) Extrapolating this, a point on the Equator would be moving faster
>> that a point at the poles or even Greenwich, for that matter. So would
>> a clock at each location move out of synchronisation with
2008/10/31 michael taylor <[EMAIL PROTECTED]>:
>
> I think it was approximately a year ago in the archives that there was
> a good thread of suggested (mostly online) readings.
>
> As well, an affordable and highly readable book is _Splitting the
> Second : The Story of Atomic Time_ by Tony Jones,
Tom,
Have you received any of my recent PMs?
2008/10/31 Tom Van Baak <[EMAIL PROTECTED]>:
...
>
> /tvb
>
73
Steve
--
Steve Rooke - ZL3TUV & G8KVD
Omnium finis imminet
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> Apart from a suitable divider
And I have one PCB left for my divider if that's of interest ... Price as
before GBP20 plus shipping (GBP12 outside UK) plus 5% Paypal tax!
PS has anyone had a chance to measure the phase noise from my divider yet -
I just don't have the tools to do it, and I know
At 9:42 AM -0400 10/30/08, Chuck Harris wrote:
>With the great ease of computers to make the transformations,
>there really isn't any point in removing local timezones. It
>is just a table after all... it is nothing like the old days when
>every major town used Local Sidereal Time (eg. 12:00 is wh
Does anybody know how to use the signal source that comes with the HP 53310A
Modulation Domain Analyser? The MDA is fine, but I don't have a manual for
the signal source, and there seems to be nothing coming out of it - and yes, I
checked the battery. There's no mention of how to use the signal s
Never mind it happens right before the holidays. I'm stressed either way.
On Thu, Oct 30, 2008 at 9:36 AM, Chuck Harris <[EMAIL PROTECTED]> wrote:
> Brooke Clarke wrote:
> > Hi Chuck:
> >
> > Not all of the U.S. uses DST, so there's a control group.
>
> That's true, but it cannot be said that th
Brooke Clarke wrote:
> Hi Chuck:
>
> Not all of the U.S. uses DST, so there's a control group.
That's true, but it cannot be said that the areas that don't
use DST are equivalent to those that do in all respects that
might cause heart problems.
It is thought the change in sleep/wake patterns is
On Thu, Oct 30, 2008 at 8:46 AM, Steve Rooke <[EMAIL PROTECTED]> wrote:
> Hi,
>
> This may have already been covered in this group so please excuse me
> for not combing the archives. I could Google for this but I'll get a
> quicker answer here and I know it will be the correct one.
I think it was
Hi Chuck:
Not all of the U.S. uses DST, so there's a control group.
Have Fun,
Brooke Clarke
http://www.prc68.com/P/Prod.html Products I make and sell
http://www.prc68.com/Alpha.shtml All my web pages listed based on html name
http://www.PRC68.com
http://www.precisionclock.com
http://www.prc68.
Ulrich,
I'll give ezgpib a try! Unfortunately it won't be until Feb. My vacation
is coming to an end. Have about 15 or 20 more hours budgeted to play
with my toys.
Have fixed the dropped data points, however. Used a timed sequence
structure inside a for loop. The sequence structure has two fram
Bruce Griffiths wrote:
> Chuck Harris wrote:
...
>>
>> It was recently reported that the onset of DST coincides with an
>> increase in heart attacks, and the return to standard time coincides
>> with a decrease in heart attacks. Yet another reason to ditch
>> Daylight Savings Time.
>>
>> -Chuck
> Hi,
>
> This may have already been covered in this group so please excuse me
> for not combing the archives. I could Google for this but I'll get a
> quicker answer here and I know it will be the correct one.
>
> !) Who decides on what is the correct time?
BIPM, the same guys that keeps the me
Chuck Harris wrote:
> With the great ease of computers to make the transformations,
> there really isn't any point in removing local timezones. It
> is just a table after all... it is nothing like the old days when
> every major town used Local Sidereal Time (eg. 12:00 is when the
> sun is at its
With the great ease of computers to make the transformations,
there really isn't any point in removing local timezones. It
is just a table after all... it is nothing like the old days when
every major town used Local Sidereal Time (eg. 12:00 is when the
sun is at its highest). That caused major p
My apologies to the list, it was unthoughtful of me. This was not my
intent, what I really meant was it's not always easy to formulate a
phrase to trigger the answer required out of Google and which sources
should I go to or believe. Really this was more meant to be a
compliment to the contributors
At 02:09 +1300 31-10-2008, Steve Rooke wrote:
> it's not always easy to formulate a
>phrase to trigger the answer required out of Google and which sources
>should I go to or believe.
Fair enough. For your first six questions, I'd use keywords including
"nist" and "
At 01:46 +1300 31-10-2008, Steve Rooke wrote:
> I could Google for this but I'll get a
>quicker answer here
To me that reads as "My time is more valuable than yours".
Not to pick on you in particular, but I see this attitude a lot
lately in fora, support groups and
2008/10/31 David Ackrill <[EMAIL PROTECTED]>:
> I would say it's very unlikely to happen. People tend to prefer the
> time in their area to match up with the day. So, having the sun come up
> at 7pm wouldn't suit a lot of people.
But people would get used to it after a while, maybe a generation,
Hi,
This may have already been covered in this group so please excuse me
for not combing the archives. I could Google for this but I'll get a
quicker answer here and I know it will be the correct one.
!) Who decides on what is the correct time?
2) Is the time standard stored on one master grandfa
Steve Rooke wrote:
> I guess the question is, what's the likely-hood of a world standard
> time being adopted (sort of like Star Trek)?
I would say it's very unlikely to happen. People tend to prefer the
time in their area to match up with the day. So, having the sun come up
at 7pm wouldn't s
Stefan,
> Apart from a suitable divider, I'd
If you a dedicated follower of PIC microcontrollers you find something
suitable here on Tom's pages
http://www.leapsecond.com/pages/ppsdiv/
Otherwise if you like AVRs then you can find something on my pages
http://www.ulrich-bangert.de/html/down
Hi,
I've been under the radar for a while so have not been able to keep up
with the threads I was contributing to but that has been done to death
and I will drop them. I've been very interested in reading peoplels
thoughts on time-zones. Has there been any moves to adopt a common
time for all coun
Thanks to all who replied, and sorry for the delay. I was away and
unfortunately unable to follow the discussion until today.
>From Tom's comments and others I extract that the PM6681 can only be used for
>measuring the ADEV when employing the picket fence technique. A direct
>measurement is pr
Pierre-François (f5bqp_pfm) wrote:
> Hi All,
>
> I think this is a great idea to replace my legacy Z3816A!...
> I also hope they'll offer as a gift the software to drive it, and they
> should gratify Bill K8CU to modify his software GPSCON to support the Z3805
> if it's not done yet!... ;-))
> 35
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Norman,
> Does EZ-GPIB support visa?
Yes, it is not a complete implementation but it should be enough for
tasks like that.
> The idea was to save the data in text files and post-process
> with excel.
Sure possible, but if the decoding can be done in realtime why not do
it.
> Based on my obser
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