Found on the net
Book
Time Frequency Signal Analysis and Processin
Time Frequency Signal Analysis and Processing.pdf.torrent
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Dear time-nuts,
This discussion of frequency of mains network makes me recall that my
HP521C counter is built such that it uses the mains network as reference
unless one has the high precision crystal option, a 100 kHz crystal
divided down to 100 Hz.
It uses the 50, 60 or 100 Hz signals to
To all,
Here is just the right kind of TIMER to have. Quite an interesting
effort that
went into this project.
http://www.evilmadscientist.com/article.php/555stool
BillWB6BNQ
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Heavy!
:-)
Rob K
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Electronics and Books
Sent: 02 July 2011 7:07 AM
To: time-nuts@febo.com
Subject: [time-nuts] Time Frequency Signal Analysis and Processing
Found on the net
Book
Time
Gentlemen,
I'm building, with help from fellow timenut Richard McCorkle, a distributed
cosmic-ray telescope to be run by students (elementary-college). Each of
the instruments has a muon detector, a GPS receiver (Navsync CW12-TIM), and
a timestamp generator designed by Richard, based on his
Here's the rub: when I use Microsoft SQL to convert an ASCII string to
datetime, it does so only to a precision of a few microseconds (at
least,
that's what it seems like to me). So, when I add in the fractional
seconds,
the overall precision isn't good enough (it's off by MICROseconds, for
Tom,
I've run into similar problems with time-stamps, in general.
Here's how to think about it.
A nanosecond is 9 decimal places, a second within a day is
another 5 decimal places. A day within a couple of centuries
takes another 5. So you are already at the precision of a
18-digit (53-bit)
Since we all know time is money, this will also work. But it's
probably less efficient to store nanoseconds as if they were
cents so I hope no one actually uses that decimal encoding.
I don't know how many digits are allowed for the money type! G
And, from the same source, it should be easy to vastly improve the accuracy
of this one.
http://evilmadscience.com/productsmenu/tinykitlist/156
On Sat, Jul 2, 2011 at 5:35 AM, WB6BNQ wb6...@cox.net wrote:
To all,
Here is just the right kind of TIMER to have. Quite an interesting
effort
From: Tom Van Baak tvb@...
Sent: Saturday, July 02, 2011 2:44 PM
To: Discussion of precise time and frequency measurement time-nuts@...
Subject: Re: [time-nuts] Precision Date/Time Calculations in MS SQL
I don't know how many digits are allowed for the money type! G
To bad you have already selected the database system. It is alway
best to think of requirements and then select parts the do what you
need.I would have selected a DMBS that allows the user to define
his own types and operators on those types. THen I'd define a type
called Precision time that
Hi
A relatively simple solution is to use the datetime field to do what it was
originally supposed to do. Let it tag time to a second. Dump in your
nanoseconds as a double indicating time since the start of the second. If at
some point you need more precision, you have the room for it
Thanks a lot for the input.
You guys gave me a lot of ideas to work from.
The oscillator is an old 10MHz OCXO BVA(electrodeless quartz crystal) from
BVA Industries with one second allan 1e-13 and -125dBc at 1Hz. So i want
to do my best to keep that stability as good as possible at the other needed
On Fri, Jul 01, 2011 at 01:06:31PM -0700, Chris Albertson wrote:
On Fri, Jul 1, 2011 at 12:46 PM, Will Matney xfor...@citynet.net wrote:
. For accuracy sake,
I'd still compare the line freq. to a standard, but that's just me.
If the computer used for this is also running ntpd the
Hi Anders:
I need something to give 2.048 MHz from a 10 MHz source, and have not
too aggressively tried to find a way; have followed with interest many
suggestions from TN's. I found a company called Vectron that makes,
ostensibly, very nice frequency translators, with an fin and an fout,
with
Don,
On 07/02/2011 09:48 PM, Don Latham wrote:
Hi Anders:
I need something to give 2.048 MHz from a 10 MHz source, and have not
too aggressively tried to find a way; have followed with interest many
suggestions from TN's. I found a company called Vectron that makes,
ostensibly, very nice
I don't think I've seen anything come across time nuts on this (at
least since I've been a subscriber), if so, I apologize for the
repost.
http://www.1yearclock.net/learnmore.html
http://longnow.org/clock/
Brent
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Hi Magnus: I goofed, it's actually 5.12 MHz, the driving crystal
standard for the ICOM 260A 2 meter transceiver synthesizer. I want to
use it with a transverter for moonbounce, hence would like to start out
with a solid reference frequency. Might even be overkill. See, I knew it
could be done with
Thanks, Brent. The last time I looked at the Long Now clock, it seemed
to be collapsing. Evidently, it's now going strong :-)
Don
brent evers
I don't think I've seen anything come across time nuts on this (at
least since I've been a subscriber), if so, I apologize for the
repost.
Don,
On 07/03/2011 12:29 AM, Don Latham wrote:
Hi Magnus: I goofed, it's actually 5.12 MHz, the driving crystal
standard for the ICOM 260A 2 meter transceiver synthesizer. I want to
use it with a transverter for moonbounce, hence would like to start out
with a solid reference frequency. Might
Hi All,
I have an ebay special TrueTime XL-DC that seems to work fine, only
thing is, I pulled the lid and found one of the BNC's was not
connected on the 87-601 board, and would like to know what the jumper/
plug arrangement is. (some BNCs have a black and white wire in one two-
pin
On 7/2/11 4:12 PM, Shane Justice wrote:
Hi All,
I have an ebay special TrueTime XL-DC that seems to work fine, only
thing is, I pulled the lid and found one of the BNC's was not connected
on the 87-601 board, and would like to know what the jumper/plug
arrangement is. (some BNCs have a black
On 7/2/11 4:12 PM, Shane Justice wrote:
Hi All,
I have an ebay special TrueTime XL-DC that seems to work fine, only
thing is, I pulled the lid and found one of the BNC's was not connected
on the 87-601 board,
Is your XL-DC a 600,601, or 602?
As I recall..
600 has blank front panel
601 has
On 07/ 2/11 02:53 AM, Will Matney wrote:
All,
For some odd reason, I think my e-mail app has sent replies to private
e-mails back to the list, and I have just noticed this. If anyone has
received them, please disregard them, and I will try to find out why this
is happening, and shut them off.
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