horses for courses.
All the commercial atomic clocks clocks I have seen only do time
corrections every hour to save on the battery consumption. With one of
these receivers ( there is even a link to a homebrew clock project on
the referenced page comments tab) you get continuous time code
All the commercial atomic clocks clocks I have seen only do time
corrections every hour to save on the battery consumption.
I thought it was only once per day, around 2 AM where the propagation was
best.
--
These are my opinions, not necessarily my employer's. I hate spam.
Mike,
Yes the commercial units only check every so often. That is a function of the
processor that is controlling the display and NOT specifically the receiver
portion.
The point is that you could have the receiver AND also have a display too boot
for
little extra money ! You can always go
On Tue, Oct 19, 2010 at 10:14 PM, Bill Hawkins b...@iaxs.net wrote:
As I understand it, 60 KHz information is so slow that phase
information is critical.
Take a look at the Synchronous Demodulator that is listed with the
Black Hole Ant. info.
http://www.unusualresearch.com/Sutton/sutton.htm
Dear Group,
it might be of interest, that I have some measured data on the ACAM
TDC-GP2 chip, which I am using for another project in our lab here.
Single shot resolution of 54 ps rms was quickly achieved, which is close
enough to the 50 ps quoted in the datasheet for me to believe it :)
As I
I(k) = (E(k)+E(k-1))*Ki*Ts/2 + I(k-1)
P(k) + Kp*E(k)
Sorry.. it must read of course:
I(k) = (E(k)+E(k-1))*Ki*Ts/2 + I(k-1)
P(k) = Kp*E(k)
73s Achim, DH2VA
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Perrier,
Where are you located?
I have been 'hooked' on CS standards for a couple of years now and have 9
functioning units, all HP, mostly 5061A's but also two 5061B's. I also have
two complete units with dead tubes and another parts beast.
The important parameters are Beam Current and Ion
Here's the page I wrote years ago on the split-shield antenna:
http://www.febo.com/time-freq/wwvb/antenna/index.html
Unfortunately, I never took any photos and the antenna is now in pieces
after a couple of moves.
I've also had good luck using an active voltage probe antenna to receive
both
Hi Bill:
I'm interested in using the C-Max RF front end for a clock application
where the time information is the goal, not like using the HP 117 for
frequency/phase info.
http://www.prc68.com/I/Loop.shtml#CMMR6P60
http://www.prc68.com/I/117A.shtml
But if you live on either coast of the U.S.
Hi Bob:
Has anyone built one of the black hole antennas?
Have Fun,
Brooke Clarke
http://www.PRC68.com
Bob Paddock wrote:
On Tue, Oct 19, 2010 at 7:16 PM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
But then again, avoid the issue and go for a black hole antenna amplifier.
Hi Brice:
That's the C-Max RF front end, see my page for the US version:
http://www.prc68.com/I/Loop.shtml#CMMR6P60
they also make versions for the other LF time signals at 40, 60 or 77.5
kHz.
Have Fun,
Brooke Clarke
http://www.PRC68.com
Heathkid wrote:
Has anyone here bought one of
I know there was a 5061B listed on Fleabay a couple times and never sold (I
think I even saw it on Craigslist)...
It's located in Houston, TX... IIRC their offices are relatively close to me, I
would be more than willing to drive down there and
test out this unit and report back any numbers /
Hi Perrier:
The problem is that the Cs beam tube is similar to a filament light
bulb, i.e. it has a limited life. Most of the used Cs standards that
are on the market have worn out tubes. The 5060 is a very crude first
generation standard see:
http://www.prc68.com/I/5060A.html
for more
Dear Achim,
On 10/20/2010 03:58 PM, Achim Vollhardt wrote:
Dear Group,
it might be of interest, that I have some measured data on the ACAM
TDC-GP2 chip, which I am using for another project in our lab here.
Single shot resolution of 54 ps rms was quickly achieved, which is close
enough to the
Lother
He who stuffed me $400 in HP gear that I now don't need.
if anyone is interested in details and the legal action I may take for
the principal and the 'fun'
email me
-pete
On Tue, Oct 19, 2010 at 9:05 PM, Perry Sandeen sandee...@yahoo.com wrote:
Gents,
Wrote: 1. TestEquipTrader is
I did some searching (perhaps ineffectively) of the archives, looking
for some discussion of the merits of the different GPSDO products that
we commonly see on auction sites. I've seen some discussions of
individual models, but nothing that really discusses the differences,
and why one unit
First point is a question, what are you going to use it for? Stable
reference? Precision timing? Etc.
Second point is, in essence, 'a man with one watch knows what time it is, a
man with two (or more) watches is never really quite sure'.
That said, I would opt for the cheapest that will
Hi
As long as they are locked, they will follow GPS's ups and downs. In holdover
there are some differences, but who plans to go into holdover...
The newer receivers are more sensitive / lock faster than the stuff from the
90's. They also *seem* to be lower jitter/wander. Weather that's true
Jason,
The best place to start is to look at the 5061B manual the operating portion
of which can be found on the internet.
Simple things would be to put the Mode switch in the CS Off position, plug
it in, and then watch the meter indications.
If everything is working correctly, the Supply
The items have been sold to a local buyer.
I'm an old man looking to lighten the load that anchors me here,
not a dealer willing to ship anywhere.
Thanks for your interest.
Bill Hawkins
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Bill,
That wasn't the point. I have several ATOMIC clock's from the 'mart,
r-shack, you name it... and they don't keep any more accurate time than most
of my wind up mechanical watches (sorry, I don't like quartz) unless I pull
the batteries and have them at a decent receiving location!
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