new...@cei.net said:
The general shape and bumps in the plots track nicely, but I'm wondering
why there's so many cycles difference after 36 hours.
How are you collecting the data? What's the time between samples?
One possibility is that one system is picking up extra clock ticks. If your
At 07:13 PM 8/6/2011, Hal Murray wrote:
new...@cei.net said:
The general shape and bumps in the plots track nicely, but I'm wondering
why there's so many cycles difference after 36 hours.
How are you collecting the data? What's the time between samples?
First off, your TEC data was an
In message 916609.32990...@smtp106.prem.mail.ac4.yahoo.com, Scott Newell
writes:
At 05:00 AM 8/3/2011, Magnus Danielson wrote:
Scaled the difference by 5 and updated to include another day:
http://n5tnl.com/tec/tec_test_02.png
The jumps in the difference looks a lot like transformer phase-lag
Could you please explain how transformer phase lags could jump?
As I understand synchronous generators tied to a common grid, it
is not possible for them to have large phase angle differences
under normal conditions. Losing a whole cycle would cause forces
that could damage the machine.
What
In message E9DFD046D648474891D49E82D6BD94E8@cyrus, Bill Hawkins writes:
Could you please explain how transformer phase lags could jump?
When one power plant ramps up and another ramps down, the power flow
reverses in some transformers and transmission lines.
If the shifts you see has this
On 08/04/2011 10:31 AM, Poul-Henning Kamp wrote:
In messageE9DFD046D648474891D49E82D6BD94E8@cyrus, Bill Hawkins writes:
Could you please explain how transformer phase lags could jump?
When one power plant ramps up and another ramps down, the power flow
reverses in some transformers and
At 03:27 AM 8/4/2011, Bill Hawkins wrote:
What that means is, that if the two locations representing the
red and green traces are on the same grid then there should be
less than one cycle difference between them at all times.
That's what I was expecting.
NTP can't be causing the jumps
On Tue, 02 Aug 2011 21:18:17 -0500
Scott Newell new...@cei.net wrote:
The general shape and bumps in the plots track nicely, but I'm
wondering why there's so many cycles difference after 36 hours.
Could be a measurement error (like losing ticks or something).
Have you ploted the difference
On 08/03/2011 11:19 AM, Attila Kinali wrote:
On Tue, 02 Aug 2011 21:18:17 -0500
Scott Newellnew...@cei.net wrote:
The general shape and bumps in the plots track nicely, but I'm
wondering why there's so many cycles difference after 36 hours.
Could be a measurement error (like losing ticks
2011 21:18:17 -0500
From: Scott Newell new...@cei.net
To: time-nuts@febo.com
Subject: [time-nuts] Weird TEC data
Message-ID: 848527.81129...@smtp109.prem.mail.sp1.yahoo.com
Content-Type: text/plain; charset=us-ascii; format=flowed
Here's the latest plot from my TEC test rigs. Y-axis is phase
Le 03/08/2011 17:32, Francis Grosz a écrit :
Hi, Scott,
Here in New Orleans a friend in the power company who was interested in
its history told me a story. In the very early days, frequency control was
pretty poor and it was hard to keep up with the changing load. So by 5 PM every
In message 7E45E47B20184CC0A55D72835D82A1F9@FBG3, Francis Grosz writes:
Still, elimination of TEC is idiotic. [...]
Well, depends, doesn't it ?
If you care more about having antique timepieces keeping time
somewhat ok when the grid is stable, it certainly is idiotic.
The bit of the
time-nuts@febo.com
Subject: Re: [time-nuts] Weird TEC data
In message 7E45E47B20184CC0A55D72835D82A1F9@FBG3, Francis Grosz writes:
Still, elimination of TEC is idiotic. [...]
Well, depends, doesn't it ?
If you care more about having antique timepieces keeping time
somewhat ok when
At 05:00 AM 8/3/2011, Magnus Danielson wrote:
On 08/03/2011 11:19 AM, Attila Kinali wrote:
Could be a measurement error (like losing ticks or something).
Have you ploted the difference between both? For me it looks as
the difference is (nearly) linearly growing over time, but it's
hard to tell
Here's the latest plot from my TEC test rigs. Y-axis is phase error
(in 60 Hz cycles), X-axis is time in MJD. The plot starts at 7AM local time.
http://n5tnl.com/tec/tec_test_01.png
Same serial connected embedded hardware, timestamped on the receipt
of first character. One machine (red
15 matches
Mail list logo
