On 6/4/12 10:24 PM, Hal Murray wrote:
Does window glass have significant attenuation at GPS L1?
What if it's a big window on a modern green office building and has some sort
of coating/content to reduce IR transmission?
Google found an (expensive) paper from IEEE where the abstract said:
On 6/4/12 10:44 PM, Chris Albertson wrote:
On Mon, Jun 4, 2012 at 10:18 PM, Hal Murrayhmur...@megapathdsl.net wrote:
What is the significance of the pointy tops of the long skinny antennas?
Guessing. Terminates the end of the conductor to prevent a discontinuity
and reflection
more
The low-E coatings are known to attenuate WIFI. WIFI is probably a worse case
than GPS, but the availability of the gear makes experimenting easy. I think
they are sputtered metal either on the glass or on a thin film applied to the
glass. Southwall Technology in Palo Alto pioneered or at least
Tim,
Can you describe your test setup used to measure the Phase Noise Plots
you show in the links provided.
Are you using the 8566B to measure the Phase Noise directly, or are you using
a Phase Noise test set to make the measurements?
Thanks
Jerry
At 08:33 PM 6/4/2012, you wrote:
On 3/06/2012
li...@lazygranch.com said:
Pay-walls on technical journals have to go. The IEEE doesn't pay the author
for the article. They used to make the author pay a small fee. Anyway, the
exorbitant fees of technical journals discourages cross-discipline research.
You can't be a member of every one of
On 5 June 2012 01:12, Dave Martindale dave.martind...@gmail.com wrote:
I don't think that's correct.
This is a funny topic. No matter where see it discussed, there are
people with different views on it. I looked on the edaforum
http://www.edaboard.com/forum26.html
and found a thread (can't
In message 20120605072656.314c1800...@ip-64-139-1-69.sjc.megapath.net, Hal Mu
rray writes:
The IEEE is particularly behind the times.
As is ACM. I'm told through the grapewine that digital subscriptions
is a major part of their budget, so nothing will be opened unless with
a crowbar.
--
On Wed, 30 May 2012 15:11:03 +0200
Attila Kinali att...@kinali.ch wrote:
I recently bought some Oscilloquartz 8663 from ebay and am now wondering
how to check whether they are working correctly or whether they are
out of specs.
Unfortunately, although i have a reasonable park of
Most Rb's can be improved when it comes to phase noise even a FRK-H, some
by replacing the internal oscillators, some by adding an external analog
loop. How ever multiplying to 10 GHz and you have to contend with the 60 db
deterioration. One way around is higher frequency XTAL or SAW
On Tue, 05 Jun 2012 00:26:56 -0700
Hal Murray hmur...@megapathdsl.net wrote:
The IEEE is particularly behind the times. I assume it's left over from when
they could get away with it because they only had to jack up the price of
printed stuff by a small amount. Some of this may trace back
On Mon, 04 Jun 2012 23:11:14 -0700
Jim Lux jim...@earthlink.net wrote:
On 6/4/12 10:44 PM, Chris Albertson wrote:
On Mon, Jun 4, 2012 at 10:18 PM, Hal Murrayhmur...@megapathdsl.net wrote:
What is the significance of the pointy tops of the long skinny antennas?
Guessing. Terminates
I'm in astrophysics and arXiv is there just for that.
Why don't others do that?
Jim
On Tuesday, 5 June 2012, Attila Kinali wrote:
On Tue, 05 Jun 2012 00:26:56 -0700
Hal Murray hmur...@megapathdsl.net javascript:; wrote:
The IEEE is particularly behind the times. I assume it's left over
On 05/06/12 12:18, Attila Kinali wrote:
On Wed, 30 May 2012 15:11:03 +0200
Attila Kinaliatt...@kinali.ch wrote:
I recently bought some Oscilloquartz 8663 from ebay and am now wondering
how to check whether they are working correctly or whether they are
out of specs.
Unfortunately, although
Time-Nutters--
What I saw in the photos of the helix antennas that I
found interesting was:
A) The tapered cone-shaped cup that some of the
helix antennas sat in. What does this do? Most
helix antennas seem to sit over a flat ground plane
but these are different.
B) Some of the
I dropped my membership a couple of years ago. Every single thing cost
money; I couldn't even skim through papers to see if they were
applicable without paying full price and it became increasingly
difficult to justify membership PLUS paying for browsing privileges
especially when
Agreed, the first is the current then the frequency at 2.5V (mine are 0-5V
EFC range). Usually the oven is defective (no heat) and I learned myself
how to fix them (they are the MV201).
On Tue, Jun 5, 2012 at 1:25 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
On 05/06/12 12:18, Attila
Hi
Put another way - nobody should directly multiply 10 MHz to 10 GHz with an
real expectation of low phase noise when they are done. The design of that
multiplier chain is a big part of the equipment design. Cheap out on it and
you will have trouble.
The same issues also get into high speed
Its actully pretty pervasive these days. I hate those sights so now
carefully see what googles pointing me to before jumping if possible.
So a quick question and not to take the thread.
Anyone know if the old IRE papers might exist someplace for free?
I ran across a few of the actual magazines and
I guarantee you it doesn't cause any controversy among those that
use circularly polarized antennas.
That the polarization changes from RHCP to LHCP when reflected is
certainly the cause of some confusion about the antennas. A RHCP
antenna that directly emits a wave towards the source will
The easiest way to think about it is to mentally think of the path from
the transmitter to the receiver as a very long piece of threaded rod, and
the wave being emitted as being a nut traveling on the rod.
Ah, and each of the photons then becomes a time nut.
/tvb
On 6/5/2012 5:36 AM, George Dubovsky wrote:
On (B) and (C), helices are tapered to broadband their frequency response.
Usually the pitch changes along with the diameter.
73,
geo - n4ua
I was just reading in the 3rd edition of Antenna Engineering Handbook,
that the sharp taper at the end
Tom Van Baak wrote:
The easiest way to think about it is to mentally think of the path from
the transmitter to the receiver as a very long piece of threaded rod, and
the wave being emitted as being a nut traveling on the rod.
Ah, and each of the photons then becomes a time nut.
Of course!
I
I've been working on a front-end board suitable for GPS and other GNSS
systems. It might be of interest to time-nuts given the application
to timing receivers.
Goals for the project:
- high-quality signals from all current and near-future GNSS systems
(GPS, Glonass, Galileo, Compass)
- wide
I took a scan through Kraus Antennas since he did much of the
definitive work on Helical antennas. In his chapter on Wave Polarization
he gives a mathematical definition of Left- and Right-circular
polarization, then quickly mentions that the IEEE definition is the
opposite. He has a footnote:
Hi:
I've used an L band amplifier and a passive GPS receive antenna as the transmitting antenna to make a GPS repeater. It
was feed from an outside GPS antenna.
This allowed having a number of hand held GPS receivers sitting side by side
working inside.
Have Fun,
Brooke Clarke
On Mon, Jun 4, 2012 at 11:26 PM, li...@lazygranch.com wrote:
The low-E coatings are known to attenuate WIFI. WIFI is probably a worse
case than GPS, but the availability of the gear makes experimenting easy. I
think they are sputtered metal either on the glass or on a thin film
applied to the
On Tue, Jun 5, 2012 at 3:18 AM, Attila Kinali att...@kinali.ch wrote:
On Wed, 30 May 2012 15:11:03 +0200
Attila Kinali att...@kinali.ch wrote:
I recently bought some Oscilloquartz 8663 from ebay and am now wondering
how to check whether they are working correctly or whether they are
out
To quote Jasik's treatment of Kraus's work:
There are two kinds of circular polarization, right-hand, and left-hand.
Either
type may be generated by a helical beam antenna, depending on the manner in
which
the helix is wound. A helix wound like a right-hand screw radiates or receives
Hi
OCXO's are mostly made up of the usual stuff of electronics. Once you get
past the heater, just about anything might go wrong. Usually it doesn't but
that's no real guarantee.
The crystal in the OCXO is what likely makes or breaks it's performance.
About the only way to check the crystal is
Both ACM and IEEE are publishers at heart. IEEE likes to boast that they
publish almost a third of the world's technical literature.
It's instructive to look at their annual reports, where sources and uses of
funds are documented. Follow the money, always.
Joe Gwinn
Ref:
On 06/ 5/12 04:06 PM, Rex wrote:
I took a scan through Kraus Antennas since he did much of the
definitive work on Helical antennas. In his chapter on Wave Polarization
he gives a mathematical definition of Left- and Right-circular
polarization, then quickly mentions that the IEEE definition is
On 06/05/2012 11:03 AM, Peter Monta wrote:
I've been working on a front-end board suitable for GPS and other GNSS
systems. It might be of interest to time-nuts given the application
to timing receivers.
Very impressive. Since I discovered time-nuts this is exactly what I
wanted to make, and
On 06/ 5/12 06:43 PM, J. Forster wrote:
IMO, the IEEE is pretty much useless for practicing engineers. It is
mostly by and for academics to build up their resumes
YMMV,
-John
I disagree with that. I find the IEEE useful as a practicing engineer. I think a
lot of companies do to. My own
I may still have the option to get something like 600 to 800 lbs of
IRE publications.
I think in South Dakota. If anyone is game/interested I can check.
On Tue, Jun 5, 2012 at 6:15 AM, paul swed paulsw...@gmail.com wrote:
Its actully pretty pervasive these days. I hate those sights so now
On 06/05/2012 03:31 PM, Attila Kinali wrote:
* The XC6SLX9 is10USD more expensive than the SLX6. I think the added
value of having twice as much real estate would justify the additional
price.
Some vendors don't even stock the SLX6, including Digi-Key! Agreed
though, it would be neat if
On Tue, 05 Jun 2012 13:48:17 -0400
Michael Tharp g...@partiallystapled.com wrote:
Disclaimer: I know very little about actually implementing a GPS
receiver, and about RF in general, but I know a cool project when I see
one and this has a lot of the elements needed for a fully open-source
Moin,
On Tue, 5 Jun 2012 12:45:24 -0400
Bob Camp li...@rtty.us wrote:
The crystal in the OCXO is what likely makes or breaks it's performance.
About the only way to check the crystal is to measure the ADEV, phase noise,
and aging of the oscillator. There's really no shortcut there.
Aging
Good luck.
About 20 years ago, I bought out the entire library of a local RD company
for $10, including well over 50' of 7' high shelves of professional
journals.
(There were a number of books I wanted and I got more than my money's
worth on those.}
Anyway, I tried to sell the journals without
On Tue, 05 Jun 2012 15:40:48 -0400
Michael Tharp g...@partiallystapled.com wrote:
On 06/05/2012 03:31 PM, Attila Kinali wrote:
* The XC6SLX9 is10USD more expensive than the SLX6. I think the added
value of having twice as much real estate would justify the additional
price.
Some
Pete
Well thats a heck of a response. You think there is 600-800 lbs of them! I
would not have thought there were so many.
But say there were 40 years worth and they were published 1 X per month at
1 lb each that would be 480 lbs.
But I don't actually think they were 40 years and a pound each.
I
Hi David,
Since I apparently have no cred, I can give you a quote from Jasik:
A right hand helical antenna transmits or receives right-hand
polarization while a left-hand helical antenna will transmit or
receive left-hand polarization. Jasik, Antenna Engineering Handbook,
First Edition, p17-3.
I have a bound set of IRE/IEEE Proceedings from about 1920 to 1985.
If anyone wants them, they are free for the taking.
Rick Karlquist N6RK
J. Forster wrote:
Good luck.
About 20 years ago, I bought out the entire library of a local RD company
for $10, including well over 50' of 7' high
I joined IEEE for a while a few years ago with the hopes of being able to
access the libraries I wanted most. What a shock to find out that I had to
pay additional monies to get access to those files. So I quit the IEEE
and now I keep getting Emails from them asking me to join again at a
reduced
Have you found Notes on the Network anywhere?
-Chuck Harris
paul swed wrote:
Pete
Well thats a heck of a response. You think there is 600-800 lbs of them! I
would not have thought there were so many.
But say there were 40 years worth and they were published 1 X per month at
1 lb each that
On Tue, 5 Jun 2012 13:20:55 -0700
Rick Karlquist rich...@karlquist.com wrote:
I have a bound set of IRE/IEEE Proceedings from about 1920 to 1985.
If anyone wants them, they are free for the taking.
I wouldnt mind getting them.. although i guess i would need another
bookshelf or two. But the
On 6/5/12 9:14 AM, Chris Albertson wrote:
On Mon, Jun 4, 2012 at 11:26 PM,li...@lazygranch.com wrote:
The low-E coatings are known to attenuate WIFI. WIFI is probably a worse
case than GPS, but the availability of the gear makes experimenting easy. I
think they are sputtered metal either on
There maybe more the IRE's. I have a smaller pile waiting for me to find a way
back to Oregon, 260 Lbs of Mcgraw-Hill Electronics. The 600-800 lbs is what
I was told the remaining mags weighs. He told me they were IREs and early
IEEE's.
If anyone is interested, I can find out.
I am still looking
Do it before libraries are outlawed!
Getting information is getting more and more difficult. Perhaps we are
seeing the sunset of the age of information.
On 06/05/12, Tom Harriscelephi...@gmail.com wrote:
A previous employer of mine would not come up with a subscription to
You can buy windows (or coverings) designed to block RF. The most common
version blocks cell freqs/wifi/etc. Generally used with a matching wall
covering to keep your secret sauce from getting out.
While you're at it, add the window vibrator to give the laser microphones an
earful.
Boy, I haven't thought about Notes on the Network for a decade or two
but I used to refer to it all the time. I see that it's available here:
http://telecom-info.telcordia.com/site-cgi/ido/docs.cgi?DOCUMENT=sr-2275ID=229670761SEARCH
for the low, low price of only $700 - soft copy only, of
On 06/ 5/12 09:23 PM, Jerry Mulchin wrote:
I joined IEEE for a while a few years ago with the hopes of being able to
access the libraries I wanted most. What a shock to find out that I had to
pay additional monies to get access to those files. So I quit the IEEE
and now I keep getting Emails
Terman Library (Stanford) used let any schmuck use the computers in the
library. You could email the articles to yourself. Now it requires a password.
They don't check for ID to enter the library, but the number of journals they
get in dead tree edition is few.
li...@lazygranch.com wrote:
Terman Library (Stanford) used let any schmuck use the computers in the
library. You could email the articles to yourself. Now it requires a
password.
BTW, the library in Terman hall is the Engineering Library
not the Terman Library. A common misconception.
Rick
Sounds like a gun with no safety and a hair trigger.
On 6/4/2012 10:41 PM, d.sei...@comcast.net wrote:
A law firm with a technology department?
-Dave
- Original Message -
From: Michael Blazermbla...@satx.rr.com
To: time-nuts@febo.com
Sent: Monday, June 4, 2012 7:44:26 PM
Subject: Re:
Most situations like that, they end up mostly firing blanks.
Peter
On Jun 5, 2012, at 7:31 PM, Michael Blazer mbla...@satx.rr.com wrote:
Sounds like a gun with no safety and a hair trigger.
On 6/4/2012 10:41 PM, d.sei...@comcast.net wrote:
A law firm with a technology department?
Hi
For your immediate need, a Thunderbolt sounds like the ideal
solution. It will give you a very accurate reference to sort out
your test gear and likely good enough phase noise for most of the
rest of what you want to do. Once you get into the microwave stuff,
plan your PLL's properly
Actually LightSquared is an investment firm. They don't make any
technology product. The company is run by a banker. Had their plan
worked they would have ben in effect a radio wholesaler buying from
producers and sellers to retailers who would then sale to end users. They
never intended to
On 6/5/12 5:20 PM, Tom Van Baak wrote:
Attached are two snapshots of a NASA live feed -- an interesting reminder about
the difficulty measuring timing signals with great precision.
When you look closely, the leading edge of the sun is rather ill-defined, not
unlike many 1PPS pulses. I suppose
Hi
You should be able to daisy chain a number of devices off of a TBolt. More or
less, you run a BNC cable with a bunch of Tee's on it to distribute the signal.
The end of the cable should get a 50 ohm load. There are better / fancier /
more expensive ways to do it using distribution
It's a Transit, not a 'zero crossing'.
-John
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On Tue, Jun 5, 2012 at 5:20 PM, Chris Wilson ch...@chriswilson.tv wrote:
I have thought of something I am unable to find an answer for via the
normal Googling, etcetera. When I get my GPS locked standard will it
be able to feed several items of test equipment simultaneously? IE,
say a sig
Ditto.
I daisy chained devices together before I got a 10 Mhz distribution amp. So
long as I didn't make any changes to the cabling while making critical
measurements it seemed to work okay.
Regards
Mark Spencer
--
On Tue, 5 Jun, 2012 8:28 PM EDT Bob Camp
Tim,
Can you describe your test setup used to measure the Phase Noise Plots
you show in the links provided.
Are you using the 8566B to measure the Phase Noise directly, or are you using
a Phase Noise test set to make the measurements?
Thanks
Jerry
At 08:33 PM 6/4/2012, you wrote:
On 3/06/2012
TAPR released the TADD-2 in March I believe; I just saw them demo it at Dayton.
http://www.tapr.org/kits_tadd-2.html
-Chase
W4TI
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To unsubscribe, go to
Jim Lux jimlux@... writes:
On 6/5/12 5:20 PM, Tom Van Baak wrote:
Attached are two snapshots of a NASA live feed -- an interesting reminder
about the difficulty measuring
timing signals with great precision.
When you look closely, the leading edge of the sun is rather ill-defined,
not
(cough) http://www.breakthepaywall.com/ (cough)
IE7 on up...
CAVEAT: I have not tried these on the ACM or IEEE sites but this works on
a couple sites I visit.
Dave
-Original Message-
From: time-nuts-boun...@febo.com
[mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed
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