Well done Bert, at last some sensible information regarding the multiplicity
of models of this Rb. I obtained my example from Fluke I for the higher
price - but he assures me that it is the RS232 programmable unit. I have not
had the opportunity to investigate it fully, but it would seem not
On Sat, Jan 7, 2012 at 11:51 AM, Attila Kinali att...@kinali.ch wrote:
On Fri, 6 Jan 2012 15:55:12 -0800
Tom Van Baak t...@leapsecond.com wrote:
Hopefully all this GPS-neutrino talk will calm down when other methods
to validate the synchronization of the clocks at CERN and LNGS are
done
On Jan 8 2012 14:02 javier.serrano.par...@gmail.com wrote:
Tom Van Baak t...@leapsecond.com wrote:
Hopefully all this GPS-neutrino talk will calm down when other methods
to validate the synchronization of the clocks at CERN and LNGS are
done (e.g., direct fiber or traveling Cs clocks).
On 01/08/2012 02:02 PM, Javier Serrano wrote:
On Sat, Jan 7, 2012 at 11:51 AM, Attila Kinaliatt...@kinali.ch wrote:
On Fri, 6 Jan 2012 15:55:12 -0800
Tom Van Baakt...@leapsecond.com wrote:
Hopefully all this GPS-neutrino talk will calm down when other methods
to validate the synchronization
what about swapping the Cs clocks between CERN and LNGS without re-
synchronizing them, and repeating the neutrino test?
Antonio I8IOV
Right, typically when you perform a traveling clock experiment
you don't touch the clocks -- you don't need to synchronize or
resynchronize anything. The key
Hi Roy
If your unit is generating an output as you report, without 5 volts to pin
4, then I'd leave well alone.
On the current batches of cheaper units, that do require a 5 volt supply to
pin 4, they won't lock or provide an output without it.
Removing that 5 volt supply from a unit
Nigel
Thanks for your comments - - the plot thickens. Would this indicate that
the 5 volt supply required for general internal use is obtained by an
internal Vreg. from the basic 15 volt supply - - I would guess so because
the overall current requirement would seem to be similar ? What is
I recently purchased a Motorola STLN4096A with the HP E1938A
oscillator. I bought it for the oscillator only.
Then I got intrigued by the HP Z3817A GPSDO that's included. I've
reverse engineered most of it and I've got it running. The 1 PPS is
really good ( 1000 measurements, Std. Dev. of
Have you already this?
On the TIB (P1) DB-25 connector, I'm fairly confident about these:
V+ pins 1 and 21
V- pins 8 and 25
10MHz #1 pins 2/15 xfmr coupled, ~4.6V into 1M
10MHz #2 pins 23/16 xfmr coupled, ~4.6V into 1M
1PPS pin 14
Supply voltage is dictated by Lucent DC-DC converter. Input is
Tom,
I had to look up traveling clock synchronization to get a
better understanding, and found this link:
http://www.newtonphysics.on.ca/einstein/chapter9.html
The idea that Qz (time on the quartz clock, no?) drops out in
the subtraction seems to me to require Qz to be invariant.
That seems
Hi Azelio,
Thanks, but I already found that. I've moved quite a bit beyond that.
That message was one of the few in the archives that had any
significant info on this unit. For some reason, I find that surprising.
Ed
On 1/8/2012 11:33 AM, Azelio Boriani wrote:
Have you already this?
Hi Bill --
Normally, they do close the loop at the end of the trip by comparing the
traveling standard again with the home reference. In the quartz days, you
would use the difference to determine the daily drift over the length of the
trip (assuming the oscillator didn't get bumped too hard)
Hi Bill,
On 01/08/2012 06:55 PM, Bill Hawkins wrote:
Tom,
I had to look up traveling clock synchronization to get a
better understanding, and found this link:
http://www.newtonphysics.on.ca/einstein/chapter9.html
The idea that Qz (time on the quartz clock, no?) drops out in
the subtraction
OK, I wasn't able to find anything else. Moreover the STLN4096A seems to
have a Rb oscillator now from the usual 'bay vendor... so seems confusing
as the Z3817A may be the E1938A mounted on the PCB that can discipline it
or it is another type of unit or whatever else. No picture found until now
The one from AA Engineering as shown in QST. With the instruction
sheet, in the plastic sleeve. At least 10 years old (judging from the
stratigraphy where I found it in the garage)
First one to send me their address, I'll stick it in an envelope and
mail it to you.
Weighs 46g or 1 5/8 oz,
On Sun, Jan 8, 2012 at 7:49 AM, gandal...@aol.com wrote:
Hi Roy
If your unit is generating an output as you report, without 5 volts to pin
4, then I'd leave well alone.
On the current batches of cheaper units, that do require a 5 volt supply to
pin 4, they won't lock or provide an output
John M. Franke WA4WDL
4500 Ibis Ct.
Portsmouth, VA 23703
--
From: Jim Lux jim...@earthlink.net
Sent: Sunday, January 08, 2012 1:33 PM
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Subject: [time-nuts] Free bare
On 1/8/12 10:33 AM, Jim Lux wrote:
The one from AA Engineering as shown in QST. With the instruction
sheet, in the plastic sleeve. At least 10 years old (judging from the
stratigraphy where I found it in the garage)
First one to send me their address, I'll stick it in an envelope and
mail it to
On 01/02/2012 09:28 PM, Azelio Boriani wrote:
On the usual paybay site there are available some Z3815 with the E1938
oscillator. I have bought one and found the shielding of the Furuno GT74
GPS heavily rusted. Fortunately it is perfectly working and the seller says
all are that way. It was the
On 1/8/2012 12:19 PM, Azelio Boriani wrote:
OK, I wasn't able to find anything else. Moreover the STLN4096A seems to
have a Rb oscillator now from the usual 'bay vendor... so seems confusing
as the Z3817A may be the E1938A mounted on the PCB that can discipline it
or it is another type of unit
I found the gt74 gps to be lacking in performance in my Z3815. Sorry, no data
sheet for it.
I simply cut the 1pps output cable, and spliced a ublox receiver 1pps output
into it. Then I split the antenna feed to both gps and found 3.3V somewhere for
the ublox gps.
Works like a charm, z3815
Hello,
After posting a few days ago about one of my '5680A's having the voltage
converter installed - but not connected - I've done a bit of
reverse-engineering and sleuthing around and (probably) have a fairly
complete picture of what it would take to populate that section of the
board.
On Sun, Jan 8, 2012 at 1:51 PM, Clint Turner tur...@ussc.com wrote:
Hello,
After posting a few days ago about one of my '5680A's having the voltage
converter installed - but not connected - I've done a bit of
reverse-engineering and sleuthing around and (probably) have a fairly
complete
The idea that Qz (time on the quartz clock, no?) drops out in
the subtraction seems to me to require Qz to be invariant.
Hi Bill,
You might be making this more complicated intended. Antonio
was asking about *resynchronizing* clocks.
Here's another example. You're at home at 7:45 AM and see
On Sun, 8 Jan 2012 14:23:02 -0800, Orin Eman orin.e...@gmail.com
wrote:
On Sun, Jan 8, 2012 at 1:51 PM, Clint Turner tur...@ussc.com wrote:
Hello,
After posting a few days ago about one of my '5680A's having the voltage
converter installed - but not connected - I've done a bit of
On 1/8/2012 5:54 PM, Tom Van Baak wrote:
Here's another example. You're at home at 7:45 AM and see
that your wristwatch is 7 minutes ahead of your kitchen clock.
You get to work at 8:30 AM and notice that your wristwatch is
5 minutes ahead of your office clock. What conclusions can
you
Hi Ed,
May I ask where did you get your STLN4096A and what you paid for it? Do
they have any more?
My E1938 recently crapped out. If I put a substitute 10MHz near the first
buffer, the PIC processor comes alive, then I can remove the 10MHz and it
begins to oscillate on it's own. I can
Magnus,
You must have tried while I was working at fixing an issue with folders that
have special characters, like ampersand and the plus sign +.
It should be working now. If you still have problem, please feel free to email
me again...
There are other characters that are not accepted, but I
On 12/31/2011 08:15 AM, Charles P. Steinmetz wrote:
I know the thread began with a request for a simple DIY GPSDO, and
this may not be quite as simple as some might like. However, PPS
discipline is generally the simplest and most universal scheme from the
standpoint of interfacing to whatever
On 01/09/2012 02:25 AM, shali...@gmail.com wrote:
Magnus,
You must have tried while I was working at fixing an issue with folders that have
special characters, like ampersand and the plus sign +.
It should be working now. If you still have problem, please feel free to email
me again...
Hi Bob,
I bought mine on eBay from fluke.l for about $114 (including shipping).
I don't know if he has any more.
He didn't get positive feedback from me. His pictures showed a
reasonable, used unit. The unit he shipped was dented badly enough that
it was slightly crushed and appeared to
Hi,
Are you sure about those resistor values? They look like 5.11K and 5.62K
(standard 1% values) to me.
Whoops - you are right: In squinting at the board I'd thought about turning
the thing 180 degrees since the numbers look believable either way! These two
5k-ish values are more in
On Mon, 09 Jan 2012 03:05:36 +0100, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
On 12/31/2011 08:15 AM, Charles P. Steinmetz wrote:
I know the thread began with a request for a simple DIY GPSDO, and
this may not be quite as simple as some might like. However, PPS
discipline is generally
On 1/8/2012 5:54 PM, Tom Van Baak wrote:
Here's another example. You're at home at 7:45 AM and see
that your wristwatch is 7 minutes ahead of your kitchen clock.
You get to work at 8:30 AM and notice that your wristwatch is
5 minutes ahead of your office clock. What conclusions can
you
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