Re: [time-nuts] GPS fade out, Sat/Sun

2012-02-16 Thread Hal Murray
Here is a graph to follow up that event.
  http://www.megapathdsl.net/~hmurray/time-nuts/Dropout-Feb-11-12-2012.png

The green/red lines on the bottom are the good/bad results from the GPRMC 
sentence each second.

The blue/purple lines on top are the number of satellites.  good means it 
had a number in the SNR slot vs empty for bad.

The unit is inside my house.  I'm in Menlo Park, 94025, the fringe of Silicon 
Valley.  There is probably lots of multi-path from my neighbors house and 
lots of attenuation from the big tree out front/south-east.

The good slots are plotted slightly above the nominal line and the bad are 
slightly below so they are both visible if they would land on top of each 
other.

I can provide the raw data if anybody wants to investigate more.

Does anybody know if the FCC wants data like this and if so do you have a 
contact?


-- 
These are my opinions, not necessarily my employer's.  I hate spam.




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Re: [time-nuts] FE-5680A Contact FEI

2012-02-16 Thread Rob Kimberley
Unfortunately FEI are very reluctant to provide anything but the basic specs
on their products. 

Company policy.

Rob Kimberley


-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Bill Riches
Sent: 15 February 2012 23:24
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] FE-5680A Contact FEI

Just curious,

Has anyone on this list actually contacted FEI and enquired about a
schematic or other info about our 5680 units?  They are still being sold by
them.

73,

Bill Riches, WA2DVU
Cape May, NJ




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Re: [time-nuts] FE-5680A Contact FEI

2012-02-16 Thread Rob Kimberley
I used to work for one of their subsidiaries, and yes, I agree entirely with
what you say Don!

Rob 

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Don Latham
Sent: 16 February 2012 02:59
To: n...@verizon.net; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE-5680A Contact FEI

FEI is the most surly and uncooperative company I've dealt with in 40 years.
Don

Peter Gottlieb
 I haven't personally tried but others have reported they were somewhat 
 less than cooperative.

 Peter


 On 2/15/2012 6:23 PM, Bill Riches wrote:
 Just curious,

 Has anyone on this list actually contacted FEI and enquired about a 
 schematic or other info about our 5680 units?  They are still being 
 sold by them.

 73,

 Bill Riches, WA2DVU
 Cape May, NJ




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 -
 No virus found in this message.
 Checked by AVG - www.avg.com
 Version: 10.0.1424 / Virus Database: 2112/4811 - Release Date:
 02/15/12



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-- 
Neither the voice of authority nor the weight of reason and argument
are as significant as experiment, for thence comes quiet to the mind.
R. Bacon
If you don't know what it is, don't poke it.
Ghost in the Shell


Dr. Don Latham AJ7LL
Six Mile Systems LLP
17850 Six Mile Road
POB 134
Huson, MT, 59846
VOX 406-626-4304
www.lightningforensics.com
www.sixmilesystems.com



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Re: [time-nuts] GPS fade out, Sat/Sun

2012-02-16 Thread Jim Palfreyman
Lightsquared doing their final test run...

Jim
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Re: [time-nuts] Oscilloquartz 5240

2012-02-16 Thread Robert Jameson

I have a copy... Are you still interested?

Regards, R


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Re: [time-nuts] Testing a LPRO RB

2012-02-16 Thread Azelio Boriani
There is no mention in the AN1002 (GPS disciplined Stratum 2 clock) of the
US patent 7,711,230 and that patent (on optical waveguides) has no mention
of temperature correction or tempco extraction...

On Thu, Feb 16, 2012 at 8:55 AM, Ulrich Bangert df...@ulrich-bangert.dewrote:

 Mark,

  John DuBois and I did
  quite a bit of work to find a way to unwind the osc
  parameters from the available unstabilized reported data
  using SciLab on the log files,  but nothing seemed to work
  reliably.

 For some information on how to do that have a look at Analog Devices
 application note AN-1002 and at the there mentioned US patent US 7,711,230.

 Best regards
 Ulrich Bangert

  -Ursprungliche Nachricht-
  Von: time-nuts-boun...@febo.com
  [mailto:time-nuts-boun...@febo.com] Im Auftrag von Mark Sims
  Gesendet: Donnerstag, 16. Februar 2012 01:56
  An: time-nuts@febo.com
  Betreff: [time-nuts] Testing a LPRO RB
 
 
 
  Lady Heather's osc drift rate calculation does assume that
  the temperature has been stabilized.   John DuBois and I did
  quite a bit of work to find a way to unwind the osc
  parameters from the available unstabilized reported data
  using SciLab on the log files,  but nothing seemed to work
  reliably.   Generally the data analysis croaked because of
  things like noise and matrix singularities.
 
  Also,  if you do stabilize the temperature,  it is very easy
  to get the osc tempco.   Just turn off the stabilization and
  see how the osc drifts as it warms up.
 
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Re: [time-nuts] Testing a LPRO RB

2012-02-16 Thread Ulrich Bangert
Nicholls et al are mentioned and they hold the patent as shown in the
attached pic...

 -Ursprungliche Nachricht-
 Von: time-nuts-boun...@febo.com 
 [mailto:time-nuts-boun...@febo.com] Im Auftrag von Azelio Boriani
 Gesendet: Donnerstag, 16. Februar 2012 13:35
 An: Discussion of precise time and frequency measurement
 Betreff: Re: [time-nuts] Testing a LPRO RB
 
 
 There is no mention in the AN1002 (GPS disciplined Stratum 2 
 clock) of the US patent 7,711,230 and that patent (on optical 
 waveguides) has no mention of temperature correction or 
 tempco extraction...
 
 On Thu, Feb 16, 2012 at 8:55 AM, Ulrich Bangert 
 df...@ulrich-bangert.dewrote:
 
  Mark,
 
   John DuBois and I did
   quite a bit of work to find a way to unwind the osc 
 parameters from 
   the available unstabilized reported data using SciLab on the log 
   files,  but nothing seemed to work reliably.
 
  For some information on how to do that have a look at 
 Analog Devices 
  application note AN-1002 and at the there mentioned US patent US 
  7,711,230.
 
  Best regards
  Ulrich Bangert
 
   -Ursprungliche Nachricht-
   Von: time-nuts-boun...@febo.com 
 [mailto:time-nuts-boun...@febo.com] 
   Im Auftrag von Mark Sims
   Gesendet: Donnerstag, 16. Februar 2012 01:56
   An: time-nuts@febo.com
   Betreff: [time-nuts] Testing a LPRO RB
  
  
  
   Lady Heather's osc drift rate calculation does assume that
   the temperature has been stabilized.   John DuBois and I did
   quite a bit of work to find a way to unwind the osc 
 parameters from 
   the available unstabilized reported data using SciLab on the log 
   files,  but nothing seemed to work
   reliably.   Generally the data analysis croaked because of
   things like noise and matrix singularities.
  
   Also,  if you do stabilize the temperature,  it is very easy
   to get the osc tempco.   Just turn off the stabilization and
   see how the osc drifts as it warms up.
  
   ___
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Re: [time-nuts] Testing a LPRO RB

2012-02-16 Thread Azelio Boriani
Now it is clear: you at first wrote US patent 7,711,230:

  For some information on how to do that have a look at
 Analog Devices
  application note AN-1002 and at the there mentioned US patent US
  7,711,230.

but it is US 6,711,230.


On Thu, Feb 16, 2012 at 2:23 PM, Ulrich Bangert df...@ulrich-bangert.dewrote:

 Nicholls et al are mentioned and they hold the patent as shown in the
 attached pic...

  -Ursprungliche Nachricht-
  Von: time-nuts-boun...@febo.com
  [mailto:time-nuts-boun...@febo.com] Im Auftrag von Azelio Boriani
  Gesendet: Donnerstag, 16. Februar 2012 13:35
  An: Discussion of precise time and frequency measurement
  Betreff: Re: [time-nuts] Testing a LPRO RB
 
 
  There is no mention in the AN1002 (GPS disciplined Stratum 2
  clock) of the US patent 7,711,230 and that patent (on optical
  waveguides) has no mention of temperature correction or
  tempco extraction...
 
  On Thu, Feb 16, 2012 at 8:55 AM, Ulrich Bangert
  df...@ulrich-bangert.dewrote:
 
   Mark,
  
John DuBois and I did
quite a bit of work to find a way to unwind the osc
  parameters from
the available unstabilized reported data using SciLab on the log
files,  but nothing seemed to work reliably.
  
   For some information on how to do that have a look at
  Analog Devices
   application note AN-1002 and at the there mentioned US patent US
   7,711,230.
  
   Best regards
   Ulrich Bangert
  
-Ursprungliche Nachricht-
Von: time-nuts-boun...@febo.com
  [mailto:time-nuts-boun...@febo.com]
Im Auftrag von Mark Sims
Gesendet: Donnerstag, 16. Februar 2012 01:56
An: time-nuts@febo.com
Betreff: [time-nuts] Testing a LPRO RB
   
   
   
Lady Heather's osc drift rate calculation does assume that
the temperature has been stabilized.   John DuBois and I did
quite a bit of work to find a way to unwind the osc
  parameters from
the available unstabilized reported data using SciLab on the log
files,  but nothing seemed to work
reliably.   Generally the data analysis croaked because of
things like noise and matrix singularities.
   
Also,  if you do stabilize the temperature,  it is very easy
to get the osc tempco.   Just turn off the stabilization and
see how the osc drifts as it warms up.
   
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[time-nuts] nanoseconds in the news

2012-02-16 Thread Tom Van Baak

Time is money...

http://www.wired.com/wiredscience/2012/02/high-speed-trading/

/tvb



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Re: [time-nuts] FE-5680A Question

2012-02-16 Thread Bob Camp
Hi

The sweep range on the LPRO's is very similar to the sweep range on the
FE's. They both run the VCXO over a very wide range compared to the width of
the Rb resonance. They both also have to accommodate VCXO temperature
performance and aging. 

Bob


-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Chris Albertson
Sent: Wednesday, February 15, 2012 5:34 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE-5680A Question

On Wed, Feb 15, 2012 at 2:17 PM, Bob Camp li...@rtty.us wrote:
 Hi

 If you look at an LPRO or FRS or any of the other brands of Rb's their
sweep
 is very different. They don't spend very much time at the ends of the
sweep
 at all. It's pretty much a triangle wave sweep up and back sort of thing.
 They don't seem to care weather they catch the lock going high to low or
 going low to high. The rate of the sweep is *much* slower than what FE is
 doing on these units. Since there isn't a brain in most of them, there's
 no pattern watching stuff there. They just look for a lock signal
(amplitude
 out of the detector) and stop sweeping when they see it.

That method requires that your sweep in so narrow that it can't catch
any other adjacent spectral lines or dips in the light.   FEI may
have found a way to use a much wider sweep by havinf a brain able to
know the fauslt dips from the one it wants.

The ends that appear dead might be where the software analyses the
data from the previous sweep.  I doubt the little uP can mulitask.
The uP is doing something when it is not sending commands to the DDS
to cause the sweep.  My understanding of a Rb physics package is that
you get a forest of lines and only the one is the good one.

Chris Albertson
Redondo Beach, California

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Re: [time-nuts] FE-5680A Question

2012-02-16 Thread Bob Camp
Hi

The sweep range on the LPRO is similar to the sweep range on the FE. The
resonance on the FE may be wider than the LPRO. The cells are similar in
size, so I would *guess* the Q's would be similar. The short term plots
(good unit vs good unit) look a lot alike, which also would argue for a
similar Q. 

Bob



-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Magnus Danielson
Sent: Wednesday, February 15, 2012 5:37 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] FE-5680A Question

On 02/15/2012 11:17 PM, Bob Camp wrote:
 Hi

 If you look at an LPRO or FRS or any of the other brands of Rb's their
sweep
 is very different. They don't spend very much time at the ends of the
sweep
 at all. It's pretty much a triangle wave sweep up and back sort of thing.
 They don't seem to care weather they catch the lock going high to low or
 going low to high. The rate of the sweep is *much* slower than what FE is
 doing on these units. Since there isn't a brain in most of them, there's
 no pattern watching stuff there. They just look for a lock signal
(amplitude
 out of the detector) and stop sweeping when they see it.

Indeed. For analogue logics of the old dinsaurs that I hurd in the 
basement a sawtooth or triangle scanning is a good strategy to track in, 
but for a processor logic you can do things a bit differently. Also, 
consider that the Q seems to be wide on the FEI 5680A you can sweep 
faster without missing the dip. Another aspect on speed is just how 
large the (needed) scan range is.

Cheers,
Magnus

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Re: [time-nuts] FS: HP Z3801A

2012-02-16 Thread Brad Stockdale

All,

   I am to the point where I am interested in selling one of my HP 
Z3801A GPSDO's. In the past when I mentioned possibly selling one or two 
of my Z3801A's, I was asked to offer them to the list first before I put 
them on eBay or anything of the sort. I'd like to see it go to someone 
who is a time nut as well.


   I am selling the unit alone, without power supply or antenna, thus 
anyone interested would need to supply a -48VDC PS and a GPS antenna. I 
use Motorola GPS antennas with great success. I've also used puck style 
antennas with success as well.


   If anyone is interested in picking up a Z3801A, please email me and 
we will discuss cost and arrangements and such. I'm not looking to 
really make anything more than my original purchase cost out of it. My 
email address is b...@shinji.net.


Thank you,
Brad Stockdale




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[time-nuts] 3048A software question

2012-02-16 Thread SAIDJACK
Hello team,
 
I am trying to get an HP 3048A system up and running, and I am having  
problems with enabling spec limit lines on the graph.
 
I can enter the spec line data under the manipulate results then spec  
lines menu, but the lines I entered are not visible. There are the standard  
spec lines visible when I do the internal noise floor test, so I know this  
should work.
 
Does anyone know how to enable these properly? The user manual doesn't talk 
 about this, and it is written for an older version of the software  
anyway's.
 
Also, I have software version A 01.01 from 1994, does anyone have any more  
recent software version?
 
Thanks in advance,
Said
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Re: [time-nuts] nanoseconds in the news

2012-02-16 Thread Peter Monta
 Time is money...

I wonder if long-distance neutrino links might be attractive to the
financial community.  The SNRs are currently way too low, but with
aggressive engineering, a link through the Earth would shave off many,
many milliseconds (even at not greater than the speed of light :-) ).
The cost would be very high though.

Cheers,
Peter

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Re: [time-nuts] nanoseconds in the news

2012-02-16 Thread Neville Michie

Obviously no one is thinking big enough.
A hyper-super computer on either side of the Atlantic could run a model
of each of the stock markets which could be synchronised by frequent  
data transfer.
The learning power of these models would be very great, and they  
could deliver a real-time
estimate of the other markets that would be hundreds of milliseconds  
better that neutrinos.
The long term veracity of these computers could not be doubted, the  
noise in short terms

would be continually reduced.
A system like GPS could be used to synchronise them so they could  
give nanosecond response.



Would that not be great for huge spikes!

cheers,
Neville Michie

On 17/02/2012, at 9:07 AM, Peter Monta wrote:


Time is money...


I wonder if long-distance neutrino links might be attractive to the
financial community.  The SNRs are currently way too low, but with
aggressive engineering, a link through the Earth would shave off many,
many milliseconds (even at not greater than the speed of light :-) ).
The cost would be very high though.

Cheers,
Peter

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time-nuts

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Re: [time-nuts] nanoseconds in the news

2012-02-16 Thread J. Forster
Frankly, I think the rapidity of the financial system is not a good thing.
It encourages the kind of speculation on Wall Street that more properly
belongs in Las Vegas.

It has bred the demands for ever increasing quarter-over-quarter results
that result in cooking of the books and so on that deters long-range
planning and thinkingt.

YMMV,

-John

==


 Time is money...

 I wonder if long-distance neutrino links might be attractive to the
 financial community.  The SNRs are currently way too low, but with
 aggressive engineering, a link through the Earth would shave off many,
 many milliseconds (even at not greater than the speed of light :-) ).
 The cost would be very high though.

 Cheers,
 Peter

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Re: [time-nuts] nanoseconds in the news

2012-02-16 Thread Tom Knox

EndRun set up the system next door to the NYSE used by GS. I think EndRun has a 
white paper on their site describing the ultimate in insider trading systems. 
It has been the subject of a number of articles and a whistle blowers case. 
Some believe it was responsible for a 1000 point glitch several years ago.

Thomas Knox


 From: namic...@gmail.com
 Date: Fri, 17 Feb 2012 09:20:07 +1100
 To: time-nuts@febo.com
 Subject: Re: [time-nuts] nanoseconds in the news
 
 Obviously no one is thinking big enough.
 A hyper-super computer on either side of the Atlantic could run a model
 of each of the stock markets which could be synchronised by frequent  
 data transfer.
 The learning power of these models would be very great, and they  
 could deliver a real-time
 estimate of the other markets that would be hundreds of milliseconds  
 better that neutrinos.
 The long term veracity of these computers could not be doubted, the  
 noise in short terms
 would be continually reduced.
 A system like GPS could be used to synchronise them so they could  
 give nanosecond response.
 
 
 Would that not be great for huge spikes!
 
 cheers,
 Neville Michie
 
 On 17/02/2012, at 9:07 AM, Peter Monta wrote:
 
  Time is money...
 
  I wonder if long-distance neutrino links might be attractive to the
  financial community.  The SNRs are currently way too low, but with
  aggressive engineering, a link through the Earth would shave off many,
  many milliseconds (even at not greater than the speed of light :-) ).
  The cost would be very high though.
 
  Cheers,
  Peter
 
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  time-nuts
  and follow the instructions there.
 
 
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Re: [time-nuts] nanoseconds in the news

2012-02-16 Thread bownes
There was a system in NJ with over 3000 ps2s in a supercomputer config. 

The financial industry's idea of high cost is a bit different than most. 

The price of your real time ticker feed from the exchanges is directly 
proportional to the associated network latency due to speed of light. 

Bob



On Feb 16, 2012, at 18:30, Tom Knox act...@hotmail.com wrote:

 
 EndRun set up the system next door to the NYSE used by GS. I think EndRun has 
 a white paper on their site describing the ultimate in insider trading 
 systems. It has been the subject of a number of articles and a whistle 
 blowers case. Some believe it was responsible for a 1000 point glitch 
 several years ago.
 
 Thomas Knox
 
 
 From: namic...@gmail.com
 Date: Fri, 17 Feb 2012 09:20:07 +1100
 To: time-nuts@febo.com
 Subject: Re: [time-nuts] nanoseconds in the news
 
 Obviously no one is thinking big enough.
 A hyper-super computer on either side of the Atlantic could run a model
 of each of the stock markets which could be synchronised by frequent  
 data transfer.
 The learning power of these models would be very great, and they  
 could deliver a real-time
 estimate of the other markets that would be hundreds of milliseconds  
 better that neutrinos.
 The long term veracity of these computers could not be doubted, the  
 noise in short terms
 would be continually reduced.
 A system like GPS could be used to synchronise them so they could  
 give nanosecond response.
 
 
 Would that not be great for huge spikes!
 
 cheers,
 Neville Michie
 
 On 17/02/2012, at 9:07 AM, Peter Monta wrote:
 
 Time is money...
 
 I wonder if long-distance neutrino links might be attractive to the
 financial community.  The SNRs are currently way too low, but with
 aggressive engineering, a link through the Earth would shave off many,
 many milliseconds (even at not greater than the speed of light :-) ).
 The cost would be very high though.
 
 Cheers,
 Peter
 
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Re: [time-nuts] FE-5680A firmware dump

2012-02-16 Thread Mike McCauley
El 07/02/2012 0:30, Elio Corbolante wrote:
 From: Steve .iteration69 at gmail.com

 I've been considering ripping the firmware from the mcu as well.  I've not
 got beyond the consideration stages, but i have all the equipment here at
 work. When you say that the read option is not available. is this because
 the chip has protection fuses enabled?

Id like to help with the disassembly if you can get the binary dump.

Cheers.

-- 
Mike McCauley   mi...@open.com.au
Open System Consultants Pty. Ltd
9 Bulbul Place Currumbin Waters QLD 4223 Australia   http://www.open.com.au
Phone +61 7 5598-7474   Fax   +61 7 5598-7070

Radiator: the most portable, flexible and configurable RADIUS server 
anywhere. SQL, proxy, DBM, files, LDAP, NIS+, password, NT, Emerald, 
Platypus, Freeside, TACACS+, PAM, external, Active Directory, EAP, TLS, 
TTLS, PEAP, TNC, WiMAX, RSA, Vasco, Yubikey, MOTP, HOTP, TOTP,
DIAMETER etc. Full source on Unix, Windows, MacOSX, Solaris, VMS, NetWare etc.


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[time-nuts] Fwd: FE-5680A Contact FEI

2012-02-16 Thread Gerald Molenkamp
I have written to them on several occasions about 56

Sent via Gerald's iPad

Begin forwarded message:

 From: Peter Gottlieb n...@verizon.net
 Date: 16 February 2012 10:58:10 AEDT
 To: Discussion of precise time and frequency measurement time-nuts@febo.com
 Subject: Re: [time-nuts] FE-5680A Contact FEI
 Reply-To: n...@verizon.net, Discussion of precise time and frequency 
 measurement time-nuts@febo.com
 
 I haven't personally tried but others have reported they were somewhat less 
 than cooperative.
 
 Peter
 
 
 On 2/15/2012 6:23 PM, Bill Riches wrote:
 Just curious,
 
 Has anyone on this list actually contacted FEI and enquired about a
 schematic or other info about our 5680 units?  They are still being sold by
 them.
 
 73,
 
 Bill Riches, WA2DVU
 Cape May, NJ
 
 
 
 
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 -
 No virus found in this message.
 Checked by AVG - www.avg.com
 Version: 10.0.1424 / Virus Database: 2112/4811 - Release Date: 02/15/12
 
 
 
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Re: [time-nuts] Fwd: FE-5680A Contact FEI

2012-02-16 Thread Mike McCauley
Hmmm,

Seems they dont realise that their lack of cooperation will lead, not to 
protecting their product, but rather to the massive, public reverse 
engineering of it?


On Friday, February 17, 2012 05:43:49 PM Gerald Molenkamp wrote:
 I have written to them on several occasions about 56
 
 Sent via Gerald's iPad
 
 Begin forwarded message:
  From: Peter Gottlieb n...@verizon.net
  Date: 16 February 2012 10:58:10 AEDT
  To: Discussion of precise time and frequency measurement
  time-nuts@febo.com Subject: Re: [time-nuts] FE-5680A Contact FEI
  Reply-To: n...@verizon.net, Discussion of precise time and frequency
  measurement time-nuts@febo.com
  
  I haven't personally tried but others have reported they were somewhat
  less than cooperative.
  
  Peter
  
  On 2/15/2012 6:23 PM, Bill Riches wrote:
  Just curious,
  
  Has anyone on this list actually contacted FEI and enquired about a
  schematic or other info about our 5680 units?  They are still being
  sold by them.
  
  73,
  
  Bill Riches, WA2DVU
  Cape May, NJ
  
  
  
  
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  -
  No virus found in this message.
  Checked by AVG - www.avg.com
  Version: 10.0.1424 / Virus Database: 2112/4811 - Release Date:
  02/15/12
  
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-- 
Mike McCauley   mi...@open.com.au
Open System Consultants Pty. Ltd
9 Bulbul Place Currumbin Waters QLD 4223 Australia   http://www.open.com.au
Phone +61 7 5598-7474   Fax   +61 7 5598-7070

Radiator: the most portable, flexible and configurable RADIUS server 
anywhere. SQL, proxy, DBM, files, LDAP, NIS+, password, NT, Emerald, 
Platypus, Freeside, TACACS+, PAM, external, Active Directory, EAP, TLS, 
TTLS, PEAP, TNC, WiMAX, RSA, Vasco, Yubikey, MOTP, HOTP, TOTP,
DIAMETER etc. Full source on Unix, Windows, MacOSX, Solaris, VMS, NetWare etc.


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