When I worked at H-P, the original H-P, Loveland instrument division the
last stage for circuit boards coming off the soldering process was a
trip through a regular home dishwasher with tap water and Calgonite. It
got ionic contamination off the boards better than anything else we
tried. I
Ah, yes, the time jump.
Reminds me of the time jump off of the Empire State building in Men in
Black III.
Sure seems like the jump should be taken in increments smaller than an
integer second.
We have the technology. :-)
Bill Hawkins
-Original Message-
From: Magnus Danielson
Sent:
This issue has been discussed at length several times. Too much
insulation is not necessarily desirable since the oscillator power has
to be dissipated and the oven design of the MV89 wasn't meant to be
put in a dewar. Better reduce the temperature gradient then fully
isolate the OCXO. The
Is Calgonite just a brand name for regular dish-washer powder? (Not being a
US denizen, the name passes me by).
Thx
Dave
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Howard Davidson
Sent: 24 January 2014 08:12
To: Discussion of
John,
thank you for your help. The idea to use IBDEV resulted from the following
official NI statement:
Snip
For current and new GPIB applications, IBDEV should be used. IBFIND will
return a board or device descriptor based off the
Hmm, yes, it's tough to say what might have motivated that recommendation.
I have no idea what a device template is, or what it might mean for
ibfind() to be difficult to port. It's worked for many years here, with
both genuine and emulated (HP 82350-series) adapters.
The one issue I've
Paul wrote:
1) Is the fact that the mv89a is inside a Dewar causing any short
term or long term adverse effects?
Dewars are appropriate for OCXOs that are designed to work in
Dewars. They do not generally improve the temperature regulation of
OCXOs that were not designed to work in Dewars,
Hi Volker
One possibility, as I found with one of these recently, is that your
oscillator has aged such that the required EFC voltage for 10MHz output is now
outside the range provided by the board.
The EFC behaviour can be tracked if Lady Heather is enabled from switch on
and the DAC
I would support a leap minute. It will still be far enough in the future that I
will not have to deal with it :)
But then we would lose that wonderful subject of conversation and we would lose
the practice of doing it somewhat regularly. I can see that the lack of
practice could easily make it
Whilst on second thoughts it does seem a bit odd that this oscillator has
passed 10MHz and still not locking this might be linked to the alarms being
generated at around 5.6 volts as per my previous comment, even though the
EFC voltage at the extreme does, theoretically at least, seem to be
Hi all,
There was some consternation here 5 months ago when Z3815A GPSDOs began
reporting a date 1024 weeks in the past. This was due to a storage overflow
condition in the Furuno GPS receiver in the Z3915A. The designers probably
never anticipated that they would still be in use 20 years
Le 24 janv. 2014 à 05:26, Paul Cianciolo a écrit :
Hello all,
I have had a MV89A running now for a couple of years now. It is inside of a
Dewar along with bypassing capacitors and the adjustment pot.
The end is sealed insulation. For a matter of convenience the oscillator is
mounted
All,
I got up this AM to a nice collection of responses and information. Thanks
to all.
Glenn, thanks for the Tek Scope article.
Hal, I think that is the command I remember. I was searching under Z3816A,
not Z3801A. I'll give it a try.
Perhaps I was not clear about 'soap'. What I was
The SX was/is a great chip. (I still use them on a near daily basis)
Troubled history, though. This is part of why Parallax developed the
Propeller.
The premise behind the propeller, is that it is based on the Virtual
Peripherals of the SX. You simulate peripherals by having interrupt code
...thanks, Bob, it seems to be the oscillator, that is at it's limit, it
cannot tune to 10 MHz at full EFC voltage, see new thread (started by Mark).
Volker
Am 24.01.2014 01:09, schrieb Bob Camp:
Hi
That’s a cell phone base station board. It’s got a bunch of outputs, some of
which are
On 1/23/2014 11:30 PM, Hal Murray wrote:
Also, I seem to recall a command that can be sent by SatStat to change from
GPS time to UTC time but I can't find it in my files. Is there such a
command or am I hallucinating?
My notes for the Z3801A say:
:diag:gps:utc 1
Tek article is quite good. Time to find a power washer for my tek 2465Bs.
Maybe that will fix the memories. Not.
Regards
Paul
WB8TSL
On Fri, Jan 24, 2014 at 10:57 AM, Donald Henderickx
wa9...@sandprairie.netwrote:
On 1/23/2014 11:30 PM, Hal Murray wrote:
Also, I seem to recall a command that
Thanks so much, Nigel, for this very interesting mail.
Yes, the voltages are exactly as my ones. And yes, I've removed the
oscillator, already. I then removed the thermal isolation from the osc,
as well as the label, in slight hope for a hidden tuning screw. Of
course, there isn't any.
I, too,
Larry,
Thanks for the info. What is 'RO'? I am not familiar with that
abbreviation.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Larry McDavid
Sent: Thursday, January 23, 2014 10:34 PM
To: Discussion of precise time and
Oops! RO is Reverse Osmosis. I incorrectly assumed that was widely
known. I've had an RO system under my kitchen sink for 30 years. Even
CostCo sells RO systems you can install yourself. There is a separate
spigot faucet on the sink for this mineral-free water.
RO systems first pass city
On Thu, Jan 23, 2014 at 2:00 PM, Tom Van Baak t...@leapsecond.com wrote:
Has anyone else looked at the Parallax Propeller processor for timing
functions?
Hi Brian,
Oh yes. Really nice chip. But for precise timing applications I had huge
problems with phase and temperature stability of
In a message dated 24/01/2014 17:06:43 GMT Standard Time,
ail...@t-online.de writes:
Thanks so much, Nigel, for this very interesting mail.
Yes, the voltages are exactly as my ones. And yes, I've removed the
oscillator, already. I then removed the thermal isolation from the osc,
as well
Volker,
I have also a Trimble Nortel NTG550AA and fortunately it works very well
from the beginning. I have a downloaded manual and some other info that
I can send you if interested.
And one word of caution: if you observe the cable that goes from the
main board to the small interface board,
9.8304 MHz divided by 300 is 32,768 Hz.
Feed that to an electronic clock and you will have an atomic clock of sorts.
Regards
Thomas Miller,
Director of Wireless Services
Skyline Network Engineering, LLC
443-250-6381
From: time-nuts-boun...@febo.com
Ignacio,
thanks for your message. Answeres within the text:
And one word of caution: if you observe the cable that goes from the
main board to the small interface board, you will see that one of the
connectors is reversed so be careful if you make a custom one for your
cabinet, do it in the
Nice! I didn't know that. But what a number, 300... Why such a
digital-hostile factor? Why not 256 or 512?
Volker
Am 24.01.2014 20:51, schrieb tmil...@skylinenet.net:
9.8304 MHz divided by 300 is 32,768 Hz.
Feed that to an electronic clock and you will have an atomic clock of sorts.
Regards
On 1/24/14 11:57 AM, Volker Esper wrote:
Nice! I didn't know that. But what a number, 300... Why such a
digital-hostile factor? Why not 256 or 512?
Volker
Am 24.01.2014 20:51, schrieb tmil...@skylinenet.net:
9.8304 MHz divided by 300 is 32,768 Hz.
Feed that to an electronic clock and you
Oukaay - I should've known... Thanks, Jim!
Am 24.01.2014 21:12, schrieb Jim Lux:
On 1/24/14 11:57 AM, Volker Esper wrote:
Nice! I didn't know that. But what a number, 300... Why such a
digital-hostile factor? Why not 256 or 512?
Volker
Am 24.01.2014 20:51, schrieb tmil...@skylinenet.net:
Chuck Forsberg WA7KGX wrote:
I did a quick comparison between Lady Heather under Wine+Linux,
Lady Heather under Win7, and WWV.
The NTP time on my office machine agrees with WWV on 5 MHz
as closely as my eyes and ears can tell. Linux is running its default
NTP, Win7 is running Meinberg (as I
Brian,
Well, my disciplining code is going to run as an FLL rather than
a PLL to generate the correction for the OCXO or the Rb reference.
The Propeller should work fine for a GPSDO. AFAIK no one has done this yet and
I encourage you to try. The Parallax Propeller chip gets mentioned on the
In a message dated 24/01/2014 21:48:27 GMT Standard Time,
ail...@t-online.de writes:
New ways of RF design - see photo ;-)
-
Definitely the last word in high rise developments:-)
And glad to hear you got it sorted.
Ok, I put three 1N4148 in series between
9.8304 MHz output, an odd frequency used by the cell tower equipment
9.8304 MHz is 8 x 1.2288 MHz which is the CDMA PN chip rate
a rather fundamental frequency to the CDMA phone system
Zim
___
time-nuts mailing list -- time-nuts@febo.com
Does anyone have experience with Datum 1050A output configurations. I have seen
them loaded with everything from 1ea - 1PPS, 100KHz , 1MHz, 5MHz, and 10MHz to
4-10MHz and 1-5MHz to units with just a single 5MHz and 10MHz. I would like to
switch one unit to 2-10MHz and 3-5Mhz or even 1-10MHz and
Hi all,
The Z3815A is working perfectly with the new receiver except for a
persistent antenna alarm. The new receiver is reporting the antenna is OK
but it must have a different self-test answer sentence to the old one. The
self-test is a PFEC sentence, which is proprietary to the manufacturer
http://www.kickstarter.com/projects/swiftnav/piksi-the-rtk-gps-receiver
Has anyone seen this? Any time-nuts utility?
Daniel
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
Hello Daniel,
Appears that is precision for position - not necessarily time. I think
NIST had a write-up on something very similar.
Regards,
John Westmoreland
On Fri, Jan 24, 2014 at 5:40 PM, Daniel Mendes dmend...@gmail.com wrote:
Hi Morris,
You should be able to bridge one of the TTL to RS-232 ports on a MAX232
onto the line from the Z3815A to the GT-8031. This will let you capture
the commands the Z3815A sends by using any terminal program. Similarly,
if you bridge onto the line from the GT-8031 to the Z3815A you
List,
What I am looking for is a way to display
Local Time (MST) and Zulu (GMT) time in a small (6 X 8 or similar)
package. There must be two displays and both lock up to NBS. Has anyone seen
such a thing?
Hi Martin,
If you look on Ebay and type in LED automobile
clocks, there is a large
All,
I had already set the local time zone offset from GPS to '0' so I can't
address the success or not of the following commands if the 'offset' has not
been set to '0'.
:DIAG:GPS:UTC 1
Worked great to set the system from GPS time to UTC time. However, nothing
changed on the display until I
Larry,
Thanks for the education.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Larry McDavid
Sent: Friday, January 24, 2014 12:21 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Z3816A
I need to clean the ham-shack here...
I have one of these HP-10811 variants that I posted about last week that I'm
willing to part with.
It is marked HP-05071-60219. It is a single oven version. It has been
tested and works .
Make me an offer above $60 and it is yours plus shipping. (USPS
Further to Martin's most helpful comments, you can see how well Windows
performs as an NTP server here:
http://www.satsignal.eu/mrtg/performance_ntp.php#windows
and as a stratum-1 server here:
http://www.satsignal.eu/mrtg/performance_ntp.php#windows-stratum-1
There's quite a lot of
42 matches
Mail list logo
