Testing of new wireless network could cause GPS outages
ED ANDRIESKI / AP
By Karoun Demirjian, Steve Kanigher
Sat, May 14, 2011 (9:09 p.m.)
A warning for night drivers: If your GPS navigator gives out on you this week,
don’t despair. What you’re experiencing is only a test of the emerging
Hi Fred,
On 05/14/2011 01:02 PM, Tijd Dingen wrote:
Magnus Danielson wrote:
Notice that the pre-scaler is only used for higher frequencies.
Understood. I was just using the prescaler as an example for the what if
if take every Nth edge.
Consider then the typical measurement setup:
A
Hi Fred,
On 05/14/2011 03:42 PM, Tijd Dingen wrote:
Magnus Danielson wrote:
There are many things you can get away with, just how much trouble you
want to verify it versus doing the proper thing is another issue.
Define proper thing. ;-) From what I understand taking the exact Nth edge,
and
I love these corporate PR statements. They bring out the American flag, Mom and apple pie
when it is really all about The Benjamins!
LightSquared, which didn?t return calls for comment Saturday, says on its website
that it is simply taking steps to fulfill President Barack Obama?s dream of a
I replaced a 2.22 version Thunderbolt with a 3.0 version
and Windows 7 Pro 64 bit went nuts. After some Googling
it became apparent that some bagbiter MS software was
interrogating the serial ports looking for a serial ballpoint
pointer. Windows started hallucinating as it tried to parse
GPS
I went a different route - I bought a multiport serial card (PCIE RS232C)
and have a dedicated, unique, serial port for the Tbolt. I put it on COM 15,
which did not even exist prior to the addition and have had no conflicts
since. Just added /15 to the .exe command line.
PC: Home made I7-875 CPU
Hi Magnus,
Magnus Danielson wrote:
Notice that the pre-scaler is only used for higher frequencies.
Understood. I was just using the prescaler as an example for the what if
if take every Nth edge.
Consider then the typical measurement setup:
A counter is set up to make a time interval
Hi,
It seems a Microsoft fixation that anything that puts streams on the
serial port is a Microsoft Serial Ballpoint (I bet you've never seen
one) since any version I remember. I don't think that the application
version makes any difference. If the application has open the port
before the
Hi Magnus,
Magnus Danielson wrote:
There are many things you can get away with, just how much trouble you
want to verify it versus doing the proper thing is another issue.
Define proper thing. ;-) From what I understand taking the exact Nth edge,
and then do linear regression is equivalent
Hi all,
does anybody out there have any ideas as where to find a 32859Hz crystal (1/2
that value would be better) to be used to replace 32768 crystals in ordinary
clocks? I think that 32768 crystals cannot be dragged that much. I've already
read the JimLux article somewhere on the web, but I
Le 15/05/2011 23:22, iov...@inwind.it a écrit :
Hi all,
does anybody out there have any ideas as where to find a 32859Hz crystal (1/2
that value would be better) to be used to replace 32768 crystals in ordinary
clocks?
I don't think this will work as the divider chain will give wrong length
Hi Fred,
On 05/15/2011 10:01 PM, Tijd Dingen wrote:
Check. That is what I understood the Overlapped variable tau estimators
bit on wikipedia to be about. Same raw data, smarter processing.
Indeed.
Notice that you need to adjust your data for cycle-slips. If you don't
do that you will get
On 5/15/11 2:22 PM, iov...@inwind.it wrote:
Hi all,
does anybody out there have any ideas as where to find a 32859Hz crystal (1/2
that value would be better) to be used to replace 32768 crystals in ordinary
clocks? I think that 32768 crystals cannot be dragged that much. I've already
read the
Hi Antonio:
Another way to do it is to use any common crystal (10 MHz would have
advantages) and a small PIC micro controller to generate the sidereal *
2^15 frequency.
Note this can be done to very high precision.
http://www.prc68.com/I/PIC16F88.shtml#PIT
Have Fun,
Brooke Clarke
Hi Fred,
On 05/15/2011 10:55 PM, Tijd Dingen wrote:
Hi Magnus,
Magnus Danielson wrote:
Well, you always have the corner-case where numerical precision and near
same frequency beating comes into play, so what will help and what will
reduce your precision becomes a little fuzzy to say in
jim...@earthlink.net wrote:
On 5/15/11 2:22 PM, iov...@inwind.it wrote:
Hi all,
does anybody out there have any ideas as where to find a 32859Hz crystal
(1/2
that value would be better) to be used to replace 32768 crystals in
ordinary
clocks? I think that 32768 crystals cannot be dragged
On 05/16/2011 12:01 AM, iov...@inwind.it wrote:
I think you're right that you can't drag a 32768 crystal down by one
part in 365. Maybe you could do it by opening the can and putting some
mass on the crystal resonator?
Some mass should be removed, not added. I was considering this
Hi there. Recently acquired my first GPSDO. It is a datum 9390 (thank you,
Norm!). One aspect of its behavior seems strange to me. Within a matter of
a few minutes, it seems that satellites are appearing and disappearing. Are
the satellites moving that quickly? I might go from 1SV to 3SV or
Shouldn't be doing it that fast
Would indicate a poor signal level might be my guess.
Is your antenna above the tree line?
Wet leaves can be nasty at 1.5 Ghz
Regards
Paul
WB8TSL
On Sun, May 15, 2011 at 6:30 PM, W2HX w...@w2hx.com wrote:
Hi there. Recently acquired my first GPSDO. It is a datum
Hi Paul. No, the antenna is not above the tree line. Leaves are wet today,
but on dry days similar. Curious: the unit puts out 5V to the antenna. If
this is 4.7 or lower, could this affect the degree of amplification the amp
built into the antenna might develop? Should I find the power supply
Hi Gene,
Unlikely. Leaves, wet or dry, are a killer. Get a longer pole for the
antenna.
-John
==
Hi Paul. No, the antenna is not above the tree line. Leaves are wet
today,
but on dry days similar. Curious: the unit puts out 5V to the antenna.
If
this is 4.7 or lower, could
Rats.
73 Eugene W2HX
-Original Message-
From: J. Forster [mailto:j...@quik.com]
Sent: Sunday, May 15, 2011 8:23 PM
To: Eugene Hertz; Discussion of precise time and frequency measurement
Cc: 'paul swed'
Subject: Re: [time-nuts] basic question on GPS satellites
Hi Gene,
Unlikely.
On Sun, May 15, 2011 at 5:07 PM, W2HX w...@w2hx.com wrote:
Hi Paul. No, the antenna is not above the tree line.
How much of the sky is visible? if you can't see blue the antenna
can't see the satellites. Ok some very minor tree coverage is Ok
maybe but mostly you need a clear view of the sky.
Depending on your QTH, you might only need 10' or so or a chain saw.
-John
On Sun, May 15, 2011 at 5:07 PM, W2HX w...@w2hx.com wrote:
Hi Paul. No, the antenna is not above the tree line.
How much of the sky is visible? if you can't see blue the antenna
can't see the
What type of coax are you using and how long is the run?
I live in the woods and my antenna is partially blocked by
trees to the north and east and have never had problems. I have about
130ft of LMR-400 between my antenna and splitter.
Scott
On 05/15/2011 05:30 PM, W2HX wrote:
Hi
Length is about 12', type is RG-58, antenna is at my window pointing to a
some blue sky (no splitter). I think from the emails from the folks on the
list, before anything, I need to find a better location for the antenna.
Thanks for the reply
73 Eugene W2HX
-Original Message-
From:
Gene -
My main GPS antenna is mounted in the middle of the peak of my Colonial
style house. I do not know if you noticed it when you were here. It has been
up there about 9 years with no problems. 73 - Mike
Mike B. Feher, EOZ Inc.
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 office
Hi Eugene,
I will presume from your call sign that you are North of the equator. Thus you
would want to have the best visibility (i.e., clear) pointing to the South. The
fact that you are at the window, on the inside, does limit the amount of sky you
can see. Just getting it on the roof will
12' of rg 58 should be fine and 5-3.7V should work
In the thread it says this is using a window. Boy some windows actually can
block the signal especially if there is a screen.
Some one else said you need a view to the south. Thats a fact from ma. at
least interesting to watch the sat tracks. I
Paul,
If you had read more carefully what I wrote you would see that I said better
coax
WHEN HE PUTS IT OUTSIDE.
thank you,
BillWB6BNQ
paul swed wrote:
12' of rg 58 should be fine and 5-3.7V should work
In the thread it says this is using a window. Boy some windows actually can
block
does anybody out there have any ideas as where to find a 32859Hz crystal (1/
2 that value would be better) to be used to replace 32768 crystals in
ordinary clocks? I think that 32768 crystals cannot be dragged that much.
I've already read the JimLux article somewhere on the web, but I
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