On 2012-03-15 20:53, Sam Reaves wrote:
WWVB
It seems that a commercial venture is driving this. Probably with all of
the research at taxpayer expense.
See:
http://www.xtendwave.com/HD%20Time.pdf
wow, in the document - this really bothers me
First and only receiver for the new WWVB signal
EMU 0202 or 2020? I know what an 0202 is but what is a 2020?
DaveB,NZ
- Original Message -
From: Demian Martin demian...@yahoo.com
To: time-nuts@febo.com
Sent: Friday, March 16, 2012 6:53 PM
Subject: Re: [time-nuts] broadband MPX signal stereo
I have tested a number of soundcards
The government sanctioning a proprietary modulation scheme isn't without
precedent. Dolby stereo in the old analog TV. That annoying IBOC scheme
used for digital FM and AM. [It is QRM.]
Of course do I approve of this? Hell no. Form a committee and define a
standard.
On 3/15/2012 11:12 PM,
In message 20120315234624.a2da94430a247d235ca68...@kinali.ch, Attila Kinali w
rites:
How good would that DAC need to be?
Depends on the level of ambition ?
1-4MB RAM
over a 256kB RAM it's get pretty thin if you want to stay in the uC
busines. Unless you want to use an ARM9 or better with
In message
CAL8XPmM+O0EP7yK7mUC16urmyBesWb+wR4UyJd5LrhLCSbWt=g...@mail.gmail.com
, Azelio Boriani writes:
I'm interested in your circular averaging buffer: suppose 1K long, the 1st
sample goes into position 0, the 2nd into 1 ... the 1000th into 999 or, the
1st gets scaled and then summed with
In message CABbxVHv0ZOmcwO6A1r8XRXjQ=v-rqw4dqorl9x8va1qxa0r...@mail.gmail.com
, Chris Albertson writes:
That would be big expensive filter. All you really need is the
average of the last N samples.
Expensive ? 2kB of memory ? Not even close to expensive.
But with a 24b-t ADC you may not
In message cabbxvhvjaxnap-kzpn6xduwa22lbokffafh35m8u_fjuup4...@mail.gmail.com
, Chris Albertson writes:
But you are right in that using dttsp [...] GNU Radio
If the objective here is time-nuttery, both of these are badly suited
because they are built to extract the rapidly changing information,
Attached are some more renderings of John Seamons' WWVB data. This is
what one might expect from a receiver that knows when the phase
reversals happen and takes them out noiselessly---re-reversing the
out-of-phase bursts to recover an approximation of the usual WWVB
signal.
The first plot shows
Moin!
On Fri, 16 Mar 2012 07:09:05 +
Poul-Henning Kamp p...@phk.freebsd.dk wrote:
In message 20120315234624.a2da94430a247d235ca68...@kinali.ch, Attila Kinali
writes:
On the other hand, if you dont have to support an OS and work on the
bare metal, you can get away with very little RAM.
In message 20120316085256.9e25deaeee4f7f8617989...@kinali.ch, Attila Kinali w
rites:
Hmm... do you mean you want to store all samples of an hour and then
avarage over it?
That would be the ideal way to do it, since it would make one heck of
a comb filter and eliminate pretty much anything else.
p...@phk.freebsd.dk said:
Hmm... do you mean you want to store all samples of an hour and then
avarage over it?
That would be the ideal way to do it, since it would make one heck of a comb
filter and eliminate pretty much anything else.
That only works if your reference clock is stable
Interesting the ESI sound card, I'll check where to buy one. Useful to
sample VLF time and frequency signals directly.
On Fri, Mar 16, 2012 at 7:26 AM, Dave Brown tract...@ihug.co.nz wrote:
EMU 0202 or 2020? I know what an 0202 is but what is a 2020?
DaveB,NZ
- Original Message -
Early this week I noticed two strange charges to my credit card account.
An investigation indicates these charges were made in China.
FYI. Vigilance advised.
--
Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen
Did you buy anything directly from China with your card ?
Raj, vu2zap
At 16-03-2012, you wrote:
Early this week I noticed two strange charges to my credit card account.
An investigation indicates these charges were made in China.
FYI. Vigilance advised.
--
Chuck Forsberg WA7KGX N2469R
Hi
Could you generate a lead and a lag estimate of the signal (in addition
to your center) and integrate against each of them on the fly? If so you
would need a *lot* less memory. I seem to recall you tried something like
this on the one of the Loran receivers.
Bob
-Original Message-
In message b8fa03dc1dd84a588a317b314a6fc...@vectron.com, Bob Camp writes:
Could you generate a lead and a lag estimate of the signal (in addition
to your center) and integrate against each of them on the fly? If so you
would need a *lot* less memory. I seem to recall you tried something like
this
On Fri, 16 Mar 2012 03:08:47 -0700
Hal Murray hmur...@megapathdsl.net wrote:
p...@phk.freebsd.dk said:
Hmm... do you mean you want to store all samples of an hour and then
avarage over it?
That would be the ideal way to do it, since it would make one heck of a comb
filter and
In message 20120316141539.d8305feaa33c99781667e...@kinali.ch, Attila Kinali w
rites:
Hmm.. i someday have to look for a good introdcution into this stuff
that doesn't rely on a lot of math. All the books i have rely at least
on Laplace.. often on z-transformation as well. And that math isn't
Azelio Boriani schrieb:
Yes, there is people who have what in the past was expensive test equipment
and now can be bought by 1/10 of the original price. The problem is that
you need someone who can record 2 seconds of a signal that is slightly
beyond the actual sound card sampling capability. A
At least in the USA one can patent pending even the neigboor's cat.
It looks in Germany we go now the same way. About 100 years ago one has
to be shown a functional device for patenting it. I think this was a
really good idea.
- Henry
Chuck Harris schrieb:
I was of the understanding that
I own a EMU0202 and when I use it with my laptop running on battery I
can see in spectrum lab FFT the DCF77 at 77.5KHz and the GB time-code
transmitter at 60KHz easily. The antenna is 1 meter of wire. Not bad for
100 bucks. I'm around 450km from DCF77 and maybe 800km from GB transmitter.
If I
Demian Martin schrieb:
I have tested a number of soundcards and while the EMU 2020 has issues
(serious jitter and noise from the USB interface) I can recommend the ESI
Juli@ as having flat response and good SNR up to 90 KHz. It's a PCI card, no
USB. I have measured the performance of FM MPX
I paypal'ed what I did, and have only seen the direct charges to my
paypal for the chinese purchases.
I don't know if credit card works thru the ebay stuff I've bought, or
the other sites when you use paypal / credit card option.
Obviously if you go via credit card checkout, all bets are
Paypal doesn't send through your CC info so there is likely no
correlation. Your CC info could have been captured anywhere, or even
hacked from an online site. The charges could have been anywhere, in
any country, including the USA. Over the years I have had card numbers
stolen
I second that Jim, Block your card quick! I am sure you would have already.
At 16-03-2012, you wrote:
Paypal doesn't send through your CC info so there is likely no
correlation. Your CC info could have been captured anywhere, or even
hacked from an online site. The charges could have
All:
To get hit with charges on your credit card from either China or Africa,
you do not have to have made purchase with your card there.
There are some groups in both those areas that are doing brute force
search attacks
on credit card numbers. They generate small charges, typically less
On Fri, Mar 16, 2012 at 4:38 AM, Chuck Forsberg WA7KGX N2469R
c...@omen.comwrote:
Early this week I noticed two strange charges to my credit card account.
An investigation indicates these charges were made in China.
If you bought something on eBay there is no way the seller gets your CC
info.
I use this on Linux:
cd ~klotz/.wine/drive_c/Program Files/Heather
wine heather.exe /IP=localhost:45000 /TW=250
I use Ralph Smith's tboltd so heather connects to a TCP port, but you
can also just give a COM port to connect on the line above.
The /TW=250 gives reasonable performance without
On Thu, Mar 15, 2012 at 11:26 PM, Dave Brown tract...@ihug.co.nz wrote:
EMU 0202 or 2020? I know what an 0202 is but what is a 2020?
It was a typo, you guessed correctly. But it seem this is not the
interface you want and it may even be discontinued. I'm happy with my
Presonus interface box
Hi
One assumption is that you will indeed be capturing / averaging for several
days. I'd include some sort of model for sunrise / sunset shifts (might be
just ignore for the next hour).
Another assumption is that your local reference is close enough and stable
enough to make a multi day average
Luckily, I use PayPal for most of my online purchases.
In the rare event I use my credit card, Citibank supplies a program call
called virtual account numbers.
It creates for you a one time only credit card number.
This guarantees no one can grab your number and use it.
From what I've seen its
In message 34c510bb3c6449b89ac4f7fbc20f4...@vectron.com, Bob Camp writes:
One assumption is that you will indeed be capturing / averaging for several
days. I'd include some sort of model for sunrise / sunset shifts (might be
just ignore for the next hour).
Some of my best results had 8 buffers
Hi
My main concern on short averages is the relatively long path from WWVB to
most of the target audience. The day / night phase shift is fairly
significant over a long path. That's something I would want to process out.
Since it (hopefully) is predictable, it's just another thing to feed into
In message f8ac6c21eb1140b384332cb89b642...@vectron.com, Bob Camp writes:
My main concern on short averages is the relatively long path from WWVB to
most of the target audience. The day / night phase shift is fairly
significant over a long path.
So do I relative to DCF77 which I used for my
Bob,
To address that diurnal phase issue, for fun, we could set up a
cloud-based time-nuts WWVB common view network. With a
couple of sites in each state, imagine the wonderful daily or
hourly animated plots that would result.
/tvb
Hi
My main concern on short averages is the relatively long
On 3/16/12 5:35 AM, Chuck Harris wrote:
I was of the understanding that SBIR's results are in
the public domain that however, doesn't mean that
a patented receiver that uses the SBIR results cannot
be had.
You too can use the results of this SBIR and patent
your receiver's special features.
Announcement from CERN:
ICARUS experiment at Gran Sasso laboratory reports new measurement of
neutrino time of flight consistent with the speed of light
http://press.web.cern.ch/press/PressReleases/Releases2011/PR19.11E.html
--
These are my opinions, not necessarily my employer's. I hate
This is the only reason I still have a Citibank card and so far, it hasn't been
cracked.
I've used it nearly 10 years.
I can buy fearlessly from anyone, knowing 2 things about this number:
It can be used just once
It expires in 1 month
http://en.wikipedia.org/wiki/Controlled_payment_number
OK, that is, are they telling us that for an experiment concluded in 9/2011
the results are available today?
On Fri, Mar 16, 2012 at 8:30 PM, Hal Murray hmur...@megapathdsl.net wrote:
Announcement from CERN:
ICARUS experiment at Gran Sasso laboratory reports new measurement of
neutrino time
I think that this is the article: http://arxiv.org/pdf/1110.3763.pdf
It is not strange that the results are available now. These experiments
are run during months, and generates a large quantity of data.
Best regards,
Javier
El 16/03/2012 21:19, Azelio Boriani escribió:
OK, that is, are
The paper is this one, dated yesterday:
http://arxiv.org/ftp/arxiv/papers/1203/1203.3433.pdf
Regards,
Javier
El 16/03/2012 21:50, Javier Herrero escribió:
I think that this is the article: http://arxiv.org/pdf/1110.3763.pdf
It is not strange that the results are available now. These
Well, I agree. Then Why the OPERA results were available at once? Why
nobody had pointed out that there was the ICARUS data processing in
progress?
On Fri, Mar 16, 2012 at 10:03 PM, Javier Herrero jherr...@hvsistemas.eswrote:
The paper is this one, dated yesterday:
Hello,
Javier Serrano can confirm it for sure, but I think that the article
with the OPERA results is based on data from 2009 to 2011, not from data
taken the previous day :)
Regards,
Javier
El 16/03/2012 23:29, Azelio Boriani escribió:
Well, I agree. Then Why the OPERA results were
On 14 Mar, 2012, at 18:08 , Brooke Clarke wrote:
The WWB paper New Improved System for WWVB Broadcast given at the 43rd PTTI
November 2011 is at: http://jks.com/wwvb.pdf
Part of the processing gain comes directly from the BPSK modulation and that
amounts to a little over 10 dB
Hello,
thank you for your oppinion.
On Thu, 15 Mar 2012, Poul-Henning Kamp wrote:
In message Pine.LNX.4.64.1203152001370.3542@tesla, Marek Peca writes:
Yes, it should work on any USB audio capable OS, ie. Linux, Windows,
MacOS etc.
I would like to recommend against this approach for a
On Fri, Mar 16, 2012 at 9:22 AM, Rix Seacord eseac...@verizon.net wrote:
Luckily, I use PayPal for most of my online purchases.
In the rare event I use my credit card, Citibank supplies a program call
called virtual account numbers.
It creates for you a one time only credit card number.
I sent the following to John Lowe of the NIST regarding the WWVB change
proposals. His comments follow.
Dear Sir,
I just read your whitepaper on the new modulation scheme proposed for WWVB.
It seems that you and the other authors of this paper have addressed the
concerns of people that use WWVB
Hello all,
I have a couple of these supplies that I plan to use with the TBolt. From
what I can gather
from searches on the internet the RO pin between the two grounds on the
power connector is a remote turn on
which is enabled by grounding this pin.
Would someone please confirm that for me?
On Fri, Mar 16, 2012 at 7:30 PM, Sam Reaves sam.rea...@gmail.com wrote:
Hello all,
I have a couple of these supplies that I plan to use with the TBolt. From
what I can gather
from searches on the internet the RO pin between the two grounds on the
power connector is a remote turn on
which
I lost track of who wrote this, but why is it assume a ferrite rod has
non-linear phase. [Group delay error I presume). Now I assume this
presumes the rod is used in a LC circuit, but if the Q is not high, the
phase linearity won't necessarily be bad.
Basically I'd like to hear more from
So I gather from this they are working on something, but no details were
given.
One possibility for a workaround to keep the classical receivers happy
is to leave some residual carrier. Instead of a 180-degree phase
shift, make it 90 or 120, so that the signal can be regarded as the
sum of a
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