Dave,
That's cool. I am the dot just above the US / Canada border and just
below the Ontario/Quebec border in Eastern Ontario.
There are many (many) documents that can found using Google on the
subject of power grids and frequency and monitoring. I have only been
able to read through only a
Tom,
On 02/28/2015 06:10 PM, Tom Van Baak wrote:
A good paper to read about the trouble when DUT is close (or equal to REF) is:
http://literature.cdn.keysight.com/litweb/pdf/5990-9189EN.pdf
Isolating Frequency Measurement Error and Sourcing Frequency Error near the
Reference Frequency
Just a thought about interpreting data:
The mains frequency changes as the loads on the system change.
Dispatchers bring more generators on line or drop them.
Some of this is predictable, depending on business hours, weekends,
holidays and the seasons.
Just as one can take the crystal aging out
On 2/27/2015 1:27 PM, Tom Van Baak wrote:
There are many wonderful web sites that deal with power line
frequency; some with live plots. Just google for words like: mains
frequency detect accuracy stability measurement
Been doing just that - fascinating! I'm getting closer to doing some
Here is a quote from the TF930/TF960 Service Guide, in the section on
calibrating the internal TCXO:
Set the Measurement Time to 1s and repeat the process. The adjustment per
step is now a decade smaller and multiple presses may be needed. The
measurement restarts after each set of key presses.
Looks like a rebadged Schlumberger Unit to me.
(Case style wise)
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
time-nuts Digest, Vol 128, Issue 1, Message: 8
Date: Sat, 28 Feb 2015 17:46:18 -0800
From: Jim Lux jim...@earthlink.net
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts] simple explanation of noise spectra with mixing,
etc.
Hi,
I have friend with a question about an IC badged with Monsanto. I
googled a bit and found that there is a big line of older maybe 60's era
counter / timers which were made and badged Monsanto.
I am asking here if anyone has some of these or have a knowledge of
whether they may have
On 28/02/2015 18:09, Tom Van Baak wrote:
Hi Daniel,
That will be an interesting experiment. I'm happy you are doing it. You may
want to run all five boards within the same house first -- to establish your
noise floor and to check your post-processing (non-aligned log files, glitches,
power
On 28/02/2015 16:58, Charles Steinmetz wrote:
Daniel wrote:
I designed a board with an OCXO, pic microcontroller, power supply,
mains interface with optocoupler, and SD card for data
collection..* * * The boards also have a small Li-Ion
battery and battery charger for short power
The downconverter was used for long runs of cable typical use case was a high
rise with data center in basement As I recall it converted the signal to a
high level baseband and amplified that whic was good for a thousand feet or so
of cable
Content by Scott
Typos by Siri
On Feb 27, 2015,
11 matches
Mail list logo
