Greetings,
I have run some time interval test and it did not quite calculate correctly. I
used a TADD2 that is configured for 2 outputs at 100 Hz, 2 outputs at 10 Hz,
and two outputs at 1 PPS. The HP5370B clock output was used as the input for
the TADD2. The output of the TADD2 was feed to
Tony,
I would suggest using the clean 10 Hz data and ignore the data with all those
gaps. In a pinch you can make use of irregular data but it's usually such a
pain it's not worth it.
To calculate the peak continuous sample rate you have to include all the
measurement overhead; this would
I have several atomic clocks in my home -- the consumer type which
syncs up with WWVB. The ones I have happen to be manufactured by
LaCrosse. They are analog clocks with hour, minute and second hands.
They can be erratic.
Last year I had to remove the face from one of them and manually reset
Most of this discussion of comparing clocks has been about time
interval.
The Racal 1992 has a function called Phase A rel B that reads the
phase angle in degrees regardless of frequency.
At one time I had two HP Z3801 receivers and three 1992 counters, so it
was natural to compare the two
Hi
From what I’ve seen, if you are after a large wall clock with mechanical hands
on it, you already have the top of the line. There are others out there. The
ones I’ve seen or tried are no better than what you already have. Many of them
are worse...
Yes, that’s sad. They are designed to hit
Steve,
Now that you have brought up this subject, do you know of any way to use these
LaCrosse clocks to calibrate frequency standards? It seems to me that since we
can buy a cheap device that receives and decodes the WWVB signal, it shouldn't
be a big step to use it as a basis for frequency
Hi
These clocks (and their wrist watch cousins) work fairly simply. They decide on
a time of day (maybe midnight) and try to pick up WWVB. If they succeed in
getting a time signal, they sync up to it and turn off the receiver. If they do
not succeed, they try again later (maybe 15 minutes,
Now that you have brought up this subject, do you know of any way to use
these LaCrosse clocks to calibrate frequency standards?
I suggest using a direct electric (1.5 VDC high-Z) or indirect magnetic (high
gain) pickup on the coil to get the +/- pulse per second. Compare this time
with your
OK ... I have C245 on the middle board, same as you. Tweaking it and ...
Hmmm, it does affect the range (twitchy is an understatement!) but still
no lock. To be continued
Now by the 'frequency control board' do you mean the board that overlaps
the top of the D-Sub connector? I have been
Radio Shack used to sell some too, they are digital, I have one for at
least teen years it is working fine all the time battery last almost the
shelf life -- three years two AA.
73
KJ6UHN
Alex
On 2/23/2014 12:56 PM, Steve wrote:
I have several atomic clocks in my home -- the consumer type
Morris,
Great to hear you got the GT-8031 transplant to work properly.
I would sure like to go the same route and modify my Z3815 with the GT-8031,
and would certainly be interested in your PCB pattern and schematic.
Also would appreciate a copy of the GT-74 manual if possible.
Thanks,
This is a different breed of time nuttery than usual in this list but i
think that at least some of you will enjoy it:
http://www.behance.net/gallery/FLUX-1440/2420150
Found it at hack a day
Daniel
___
time-nuts mailing list --
Yes It took me several tries to find the spot, I only had success when I
began only moving it in tiny increments I was not getting anywhere with
1/4 or 1/8 turn adjustments, and you should leave it a few minutes on
each try when mine finally did lock is started at a little over 10MHz
and then
I also have a 5680A with that strange little board. On a hunch, I
disconnected the orange wire and injected a DC voltage into the main
board. It caused the frequency to change. I don't know if it's the
C-field control or another mechanism, but the result is the same.
Ed
On 2/23/2014 4:01
The really scary thing is that this is some sort of postgraduate thesis
project examined by a swag of learned doctors, complete with the artistic
waffle of What It All Means.
Tom Harris celephi...@gmail.com
On 24 February 2014 15:11, Daniel Mendes dmend...@gmail.com wrote:
This is a
Accuracy depends on the stepper motor driver :-)
A really neat conceit!
Don
Daniel Mendes
This is a different breed of time nuttery than usual in this list but i
think that at least some of you will enjoy it:
http://www.behance.net/gallery/FLUX-1440/2420150
Found it at hack a day
16 matches
Mail list logo
