Use the RbMon utility to monitor the unit's operation as it starts up to
confirm that the lamp is started and the photocell is detecting a signal.
Not long ago there were a number of units available for sale on Ebay
that appeared to have a lamp problem.
On 23/08/2013 02:10, Paul wrote:
As I
Hi
Not all semiconductor processes are created equal. In order to get things going
faster you change things around. Past a point, those same changes negatively
impact the leakage and 1/f noise corner. When all the changes happen, the
jitter goes up. That turns it very much into a test it and
I am having some difficulty setting up my HP53132A to make 1 PPS Time
Interval readings. I am outputting them to TimeLab via the counter's
talk-only output. TimeLab reads the counter fine and I am able to make
plots of 10MHz frequency comparisons. But I need a little help in properly
setting up
The time nut related comics that were posted the other day where good. I made a
note to start keeping track of those and similar ones.
And in today's funnies I found this one:
http://www.gocomics.com/herman/2013/08/21
Cheers, Graham ve3gtc
___
TVB probably drew that when he was in kindergarten :). - Mike
Mike B. Feher, EOZ Inc.
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960 office
908-902-3831 cell
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Collins, Graham
Sent:
Hi
There are several approaches to doing 1 pps readings - which one are you trying?
1) Feed in two 1 pps signals, have one start and the other stop the counter
2) Feed in a 10 MHz and a 1 pps signal have the 1 pps start and the 10 MHz stop
the counter
3) Feed in an accurate 100 Hz and a 1 ps.
Hi
Pretty much all of the small Rb's that I have seen (LPRO, FE 56xx's, PRS-10's)
lock up in under 10 minutes if they are running properly at room temperature.
Most system level specs seem to want them to be doing something in under 10
minutes. They are fairly far off at lock, but converge to
Wow, this new type of clock is not even 100 times more longterm stable
than the Cs fountain clock, it's even short-term stable as a H-maser,
obviously.
In the NIST article: http://www.nist.gov/pml/div688/clock-082213.cfm
it's told, that the 1s instability is the same as the 400,000 sec or 5
Paul,
The datasheet says it should lock in under 6 minutes.
You may have the lamp assy problems that have been posted before.
Corby
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
Hi
Optical clocks keep getting a little bit better each time they try this or
that. They still have a way to go before you will have one running 24/7/365
without it costing more than even NIST can afford to spend.
Bob
On Aug 23, 2013, at 10:51 AM, Frank Stellmach frank.stellm...@freenet.de
I just received an Austron 1120S oscillator. Since the 1120 has an
8-pin octal tube plug, I was surprised to find that the 1120S has a
9-pin miniature tube plug. So, before I let the magic smoke out, does
anyone have the pinout for an 1120S and/or any info on any equipment it
might have been
Hi Guido,
Do you have any idea why the unit interprets the date 7168 (0x1c00) days into
the future? If I send it today's date in the correct Motorola format, this is
how many days it adds to it. If I change the date to try another, it does the
same thing. Any idea why? I can correct for it
hallo all,
if you are a notorious DIYer, have some soldering skills and know how to
program an ATmega8515 microprocessor, have a look at:
http://www.g-romahn.de/tbolt2lcd/index.htm
for a simple small Thunderbolt monitor
cheers Götz
Am 17.08.2013 17:53, :
This is a repost with a new thread.
Hi Götz,
very nice handy project, just to watch the TB without a PC.
You should have as a KIT .
Best regards,
Ernie.
-Original Message-
From: Götz Romahn go...@g-romahn.de
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Fri, Aug 23, 2013 6:52 pm
Optical clocks keep getting a little bit better each time they try this or
that. They still have a way to go before you will have one running 24/7/365
without it costing more than even NIST can afford to spend.
From Daniel Kleppner's Time Too Good to Be True
Physics Today, March 2006
I guess the funny comment here is that yes the monitor can be done on
anything including a commodore 64 or apple II.
But the thread started with Diddier suggesting a $60 US solution and he
would write up and package the boards and parts and thats quite reasonable.
Anyone willing to take on the
Here is an announcement article:
http://www.sciencemag.org/content/early/2013/08/21/science.1240420.full
David
On 8/23/13 10:51 AM, Frank Stellmach wrote:
Wow, this new type of clock is not even 100 times more longterm stable
than the Cs fountain clock, it's even short-term stable as a
Hi Alan,
I haven't seen this behaviour yet, but then I have RFTG shut off for a couple
of months since.
7168 is dividible by 7 and the result is 1024. You know the gps week wraps over
from 1023 (0x3ff) to 0.
Perhaps what you see is the consequence of some software workaround of this
problem,
It can't be a coincidence that it is exactly 7*rollover.
Le 23 août 2013 à 17:57, Alan Kamrowski II a écrit :
Hi Guido,
Do you have any idea why the unit interprets the date 7168 (0x1c00) days into
the future? If I send it today's date in the correct Motorola format, this
is how many
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
Hi Guido and mc235960,
It stopped doing it all of a sudden and is now accepting the date properly. I
did numerous CPU resets on it and one power down/power up and it still did it.
Telling the unit the date was old (1/1/1994) took fine so I kept increasing the
year 1999, 2000, 2005, 2015 and
Hi
According to the guys at Lucent, there were numerous fixes / updates /
enhancements of the code in the GPS cards they used. The number they tossed out
was hundreds. I suspect that was an exaggeration. Even if it was only
dozens there likely are a number of different code images in the
Hi,
Andrew Ludlow himself was so kind to send me the Sciencexpress article,
just a few minutes ago..
A pity that I can't post it here (2.2MB).
The Allan deviation is nearly linear, following roughly a
3.2E-16/sqrt(tau) equation (calculated for a single clock).
At tau = 1 sec, the
Don't you just love paying to access research that your taxes already paid
for? Gives you a warm, fuzzy feeling all over. :-P
-- john, KE5FX
Miles Design LLC
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of David McGaw
Sent:
Hi Paul:
Use the Rb monitor program to check to see if the unit is in the mode to lock.
There's another mode where the Rb is free running and the 1PPS is time stamped.
If in this mode there's no lock.
Have Fun,
Brooke Clarke
http://www.PRC68.com
An even bigger problem is that once they decide they are not making enough
money with it, it won't even be available at any price.
Didier KO4BB
John Miles j...@miles.io wrote:
Don't you just love paying to access research that your taxes already
paid
for? Gives you a warm, fuzzy feeling all
On Fri, Aug 23, 2013 at 03:03:13PM -0700, John Miles wrote:
Don't you just love paying to access research that your taxes already paid
for? Gives you a warm, fuzzy feeling all over. :-P
Now, now, perhaps it is better to feed the (GOP) pigs
than let them ban the research altogether as
On Sun, Jan 27, 2013 at 06:47:07PM -0500, Peter Gottlieb wrote:
What I would really like in Windows is a way to lock the configuration and
make it more of an appliance which always worked the same way. That way a
small board talking to a Thunderbolt would always start up and just run. I
Hi
Pardon my interjection …. but.
For a simple TBolt monitor, *any* OS is total overkill. If all you have is a
small / simple display - you can't put much up there. For a monitor you don't
have a keyboard / mouse / usb touchpad / Bluetooth presentation wand. Nothing
to do and nothing to
Frank,
You are welcome to upload the article to my web site's manuals pages:
Http://WWW.KO4BB.com/manuals
Didier KO4BB
Frank Stellmach frank.stellm...@freenet.de wrote:
Hi,
Andrew Ludlow himself was so kind to send me the Sciencexpress article,
just a few minutes ago..
A pity that I
All NIST papers are available for free. Makes you happy to be a taxpayer. The
one you're talking about is at:
http://tf.boulder.nist.gov/general/pdf/2688.pdf
/tvb (iPhone4)
On Aug 23, 2013, at 3:03 PM, John Miles j...@miles.io wrote:
Don't you just love paying to access research that your
Use the RbMon utility to monitor the unit's operation as it starts up to
confirm that the lamp is started and the photocell is detecting a signal.
I'm not at all clear how to interpret the output but I think having
the FET voltage stuck on 255 means the lamp isn't igniting.
It also reports
Hi
Pardon my interjection …. but.
For a simple TBolt monitor, *any* OS is total overkill. If all you have is a
small / simple display - you can't put much up there. For a monitor you
don't have a keyboard / mouse / usb touchpad / Bluetooth presentation wand.
Nothing to do and nothing to
There was one just posted here using the Atmel AVR chip. He used a total
of about $12 in parts. You could use a TI Launchpad if you don't like
soldering and still spend less than $20. And as was said, no OS at al.
It is simply not required for such a simple job.
If it were me, I remove the
Hello all,
I'm looking for a manual with schematics or at least an electronic copy
of the schematics.
Thank you,
Merchison
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
35 matches
Mail list logo
