On 03/10/2011 09:42 AM, Stephan Sandenbergh wrote:
Hi,
Cross-correlation a very clever idea! Thanks for the reference - Rubiola got
some good sources of reference on his home page.
One thing though - for a phase-noise kit one will probably need to replace
the ZCD with a low-noise amplification
On 03/11/2011 09:33 PM, Stephan Sandenbergh wrote:
Hi,
Ok some cool advice - this thread is an interesting thought exercise. I'm
going to think about it a some more, but it seems, in comparison at least,
the loose phase-lock technique remains the simplest. Provided you have a
low-frequency
Hi,
I have a question for you guys.
I am currently fixing a 5370B and when I check the internal noise I got
23.2pS I think it is a bit too much.
Could you check yours noise?
1) Connect a cable between the rear panel FREQ STD OUT to front panel START
input connector
2) Set the input
John Miles schrieb:
Sound cards will usually end up running within 1 Hz of the desired sampling
rate, but it's important to pick a sampling rate that's native to the
hardware, or the driver will resample the data. On Windows, many drivers
for popular sound cards rely on some imprecise
I have an HP 5370B (S/N 2904A02491 that I bought years ago, but have never
really used it, and feel someone else can probably make better use of it. The
unit is in quite good condition. I know its a fairly late serial number - since
I recall having to hunt around for a manual that covered that
Try this direct link:
Hello The Net:
My OysterQuartz has been resurrected and I am happy with the results.
I appreciate everyone's response.
I researched local watch repair facilities and found one in town.
After finding the right person to talk to, who knew that the
OysterQuartz really took a battery,
I had him
Mine measure between 13 and 14 ps
Date: Sat, 12 Mar 2011 11:26:48 +0100
From: Jean-Louis Noel j...@stben.net
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts] noise of a 5370
Message-ID: 2FD7B4DFC01B438A86E9675D1909BDC1@garadm
In a message dated 12/03/2011 04:03:09 GMT Standard Time, b...@iaxs.net
writes:
Wizard, they want my name and email address. That can be sold to anybody
to use on their mailing list of pushy offers. They offer a service that
I do not want.
---
Hi Bill
I'm sorry to hear
At 05:26 AM 3/12/2011, Jean-Louis Noel wrote...
I am currently fixing a 5370B and when I check the internal noise I
got
23.2pS I think it is a bit too much.
Could you check yours noise?
The manual says to expect jitter of 35 ps typical, 100 max. One of mine
is ~30, the other ~20.
Yes Graham.
But we are intelligent, or?
Use a torrent.
Or a friendly hoster like bplaced.net
- Henry
--
ehydra.dyndns.info
gandal...@aol.com schrieb:
I'm sorry to hear you continued to have problems and do not know quite
where you ended up.
As others have pointed out, Rapidshare,
I just tried it, and the Free download works fine with FF, but fails with IE6.
I suspected it may have been a Java problem, so I ran an update on IE6 with no
improvement.
It seems the problem is IE6.
ian
Date: Fri, 11 Mar 2011 20:03:01 -0800 (PST)
From: J. Forster j...@quik.com
To:
In a message dated 12/03/2011 15:37:21 GMT Standard Time,
cadbl...@hotmail.com writes:
I just tried it, and the Free download works fine with FF, but fails with
IE6.
I suspected it may have been a Java problem, so I ran an update on IE6
with no improvement.
It seems the problem is IE6.
Hi Mike,
From: Mike S mi...@flatsurface.com
23.2pS I think it is a bit too much.
Could you check yours?
The manual says to expect jitter of 35 ps typical, 100 max. One of mine
is ~30, the other ~20.
Yes, I saw that!
But, where is the logical when your display starts at 100fS?
Bye,
In a message dated 12/03/2011 15:23:39 GMT Standard Time, ehy...@arcor.de
writes:
Yes Graham.
But we are intelligent, or?
Use a torrent.
Or a friendly hoster like bplaced.net
- Henry
-
Oh Henry
I don't use torrents, I don't know bplaced, I actually PAY for the
At 10:45 AM 3/12/2011, Jean-Louis Noel wrote...
Yes, I saw that!
But, where is the logical when your display starts at 100fS?
A mean (average) measurement improves things by the square root of the
number of measurements, if I'm not mistaken. So, if you measure 100,000
times, then a 35 ps
Hi,
The average will approach 0.0 as the number of samples is increased, but not
the standard deviation.. The value displayed by their unit is standard
deviation.
Bye,
Said
Sent from my iPad
On Mar 12, 2011, at 8:47, mi...@flatsurface.com (Mike S) wrote:
At 10:45 AM 3/12/2011, Jean-Louis
- Original Message
From: Jean-Louis Noel j...@stben.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sat, March 12, 2011 2:26:48 AM
Subject: [time-nuts] noise of a 5370
Hi,
I have a question for you guys.
I am currently fixing a 5370B and when I
Mine shows approx 25 ps.
- Original Message
From: Jean-Louis Noel j...@stben.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sat, March 12, 2011 2:26:48 AM
Subject: [time-nuts] noise of a 5370
Hi,
I have a question for you guys.
I am currently
At 12:00 PM 3/12/2011, Said Jackson wrote...
The average will approach 0.0 as the number of samples is increased,
but not the standard deviation.. The value displayed by their unit is
standard deviation.
If you're measuring jitter of an external signal, accuracy is obviously
much worse than
All IE6 users pay YOU with time for nothing. Thanks!
- Henry
--
ehydra.dyndns.info
gandal...@aol.com schrieb:
In a message dated 12/03/2011 15:23:39 GMT Standard Time, ehy...@arcor.de
writes:
Yes Graham.
But we are intelligent, or?
Use a torrent.
Or a friendly hoster like
I've put a copy on my server:
http://kevin.org/time-nuts/Handbook_of_Time_Code_Formats.zip
-Kevin
- Original Message -
From: gandal...@aol.com
To: time-nuts@febo.com
Sent: Friday, March 11, 2011 6:38 PM
Subject: [time-nuts] Datum Handbook of Time Code Formats
I guess the title
I would like to see more in one place about implementing these ideas. The
bits are scattered in different places and I'm not sure where to find them
all.
One resource for getting the signals sampled at SOTA performance for a
reasonable price is this demo board from TI: PCM4222EVM
Oh yeah, forgot to mention this with regard to the tapped delay line...
Make sure you don't use the fpga dcm/pll for clock generation. It is
too jittery. Generate an external reference as high as feasible that
is still acceptable to the IOB's of the fpga you intend to use. It makes
sense to make
I've also just downloaded the slow version in 2.5 minutes. Seems damn
quick to me. This was with Firefox, which I prefer above all other browsers.
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of gonzo .
Sent: 12 March
The opposition to the use of L-band spectrum for broadband Internet access is
growing. Several companies and industry organizations have joined the
Coalition to Save Our GPS.
http://www.saveourgps.org/
A study by Garmin details the effect the Lightsquared transmitters will have a
typical
For that kind of sampling rate you may want to consider the ADS1258EVM.
At 46 euro it's a pretty good deal IMO. I've been using it for some time
now and I really like it. Got mine from Mouser...
Hi Everyone,
From: Mark Spencer mspencer12...@yahoo.ca
Mine shows approx 25 ps.
I am currently fixing a 5370B and when I check the internal noise I got
23.2pS I think it is a bit too much.
So, it's not too bad for a device saved from trash!
Ebay 120681814403.
Thanks.
Bye,
Jean-Louis
At the moment I design a Ethernet UDP-capable sound-card as a secondary
priority project in free-time.
I settled to the AD7641 but welcome any suggestions/additions if one is
interested.
The main app would be SpectrumLab.
cheers -
Henry
--
ehydra.dyndns.info
Tijd Dingen schrieb:
For that
Hi,
My 5370B gives about 21ps
Robert G8RPI.
From: Jean-Louis Noel j...@stben.net
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sat, 12 March, 2011 10:26:48
Subject: [time-nuts] noise of a 5370
Hi,
I have a question for you
I find this quite strange. I have three questions:
1) Why would your FCC allow such a thing?
2) For this company to have high bandwidth they're going to need a
precision time source at each transmitter. Will it be gps??? :-)
3) Wouldn't the most used GPS devices in the US be smartphones (iPhone
or djvu:
http://any2djvu.djvuzone.org/djvu/110312/84.181.76.205/19469.110312152109.djvu
- Henry
--
ehydra.dyndns.info
Rob Kimberley schrieb:
I've also just downloaded the slow version in 2.5 minutes. Seems damn
quick to me. This was with Firefox, which I prefer above all other browsers.
On 03/12/2011 10:09 PM, Jim Palfreyman wrote:
I find this quite strange. I have three questions:
1) Why would your FCC allow such a thing?
To enable high capacity wireless access.
2) For this company to have high bandwidth they're going to need a
precision time source at each transmitter.
I find this quite strange. I have three questions:
1) Why would your FCC allow such a thing?
There is FAR more money in WiFi than GPS. That means there is more to
grease up politicians.
2) For this company to have high bandwidth they're going to need a
precision time
On Sat, Mar 12, 2011 at 1:09 PM, Jim Palfreyman jim77...@gmail.com wrote:
I find this quite strange. I have three questions:
1) Why would your FCC allow such a thing?
(a) FCC commissioners are political appointees, not engineers. They
are appointed to 6 year terms. Maybe they were appointed
I just put the file on a small computer I use as a general purpose
development server. It mostly runs 24x7 but I might reboot to test a
start-up script without warning. I'll leave it there for a while
http://albertson.zapto.org/~chris/Handbook_of_Time_Code_Formats.pdf
If it does not work
On Sat, Mar 12, 2011 at 01:29:55PM -0800, J. Forster wrote:
2) For this company to have high bandwidth they're going to need a
precision time source at each transmitter. Will it be gps??? :-)
A sheet of aluminum as a ground plane below their GPS antennas will kill
a lot of QRM if the
Jim, some of those questions are easy to answer:
(1) In the FCC the decisions in this case were (and are) made by lawyers
and politicians, which the engineers work for. Lightsquared knew about
the frequency allocation loophole (lawyers) and they knew that if they
could take advantage of it
(3) If they get their license rest assured that GPS as we know it will
disintegrate, along with every user of it (civilian and military). Rest
assured that a LOT of effort is being spent fighting this.
Are you sure about this??
Imagine the day they power up their transmitters (I know it
Corporations are people, except they get to spend unlimited secret money for or
against politicians. Thus it is not what the government wants, but rather what
the corporations demand.
The FCC has a history of ignoring good engineering. BPL and IBOC for example.
Well I got one form email back
Yes, the TI will get more accurate with time. But the setup suggested in
previous email doesn't measure TI.
It measures the standard deviation of that TI. Big difference, two completely
different numbers. The SD number is essentially a measure of the absolute
amplitude of the noise. Since it
In my experience, neither lawyers nor politicos are bound by engineering
or logic or really anything rational.
It's all about who can be the best advocate for their position. Often, the
decision is made even before the the facts are known, on some golf course
or at a discrete, private dinner.
Whilst the standard deviation of the individual measures of TI will be
invariant with the number (N) of TI measurements made (provided the
environment doesn't change and the noise remains white), the standard
deviation of the averaged TI will decrease with increasing N until drift
and non
I discovered today that the my tek 2252 scope effectively has a time interval
counter that at first glance seems to provide similar resolution to my
HP 5370B. The propagation delay function can be used to measure the time
interval between signals on ch 1 and ch 2. Looking at 10 Mhz signal
The military is the one service that won't be affected by this interference.
They run on a different band, and their modulation is more robust than
the civilian side.
Jim Palfreyman wrote:
(3) If they get their license rest assured that GPS as we know it will
disintegrate, along with every user
On 13/03/2011, li...@lazygranch.com li...@lazygranch.com wrote:
Corporations are people, except they get to spend unlimited secret money for
or against politicians. Thus it is not what the government wants, but rather
what the corporations demand.
Isn't this what is called CORRUPTION or is
On 13/03/2011, Chuck Harris cfhar...@erols.com wrote:
The military is the one service that won't be affected by this interference.
They run on a different band, and their modulation is more robust than
the civilian side.
Well if it is affected, maybe GPS users should lobby for free access
to
The military is the one service that won't be affected by this
interference.
They run on a different band, and their modulation is more robust than
the civilian side.
Could you deliberate a bit? I suspect that military receivers use L1 C/A,
L1 P(Y) and L2 P(Y). This is the exact same signals
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