> deriving exact time to way closer than a second from the signal
To the average consumer if the clock is accurate to within a minute or
so they are happy. The clocks also run on a RTC and only use WWVB to
keep the RTC more or less accurate. The clocks are also only looking at
the carrier level
Dear Colleagues
I have made some tests with my self-made GPSDO which we discussed on this
very list.
I was allowed to install it at my workplace and put the antenna on the
roof, with almost 360° free sky view.
(I will have to compare different oscillators anyways, so I could install
mine as well.
Hello all...
I have a question that I have been unable to answer,and I am sure one of the
learned time-nuts will havean instant answer for me!
During my searching for an answer to my question, I
learned that there is an NIST Facility at Boulder, CO
that has a 4 Cs Ensemble that is the frequency
I noticed that HP made a particular choice about connecting the ground side
lamp power supply. HP use a coaxial cable between the physical assembly and a
connector mounted on the chassis, then a single + 20V wire is connected to the
voltage regulator board, while the chassis acts as a
Bob wrote:
Oscillatek was acquired by K in the early 1980’s. K was acquired
by Dover in
the mid 1980’s. Dover acquired Vectron Labs in the early 1990’s. All
data on the
Oscillatek parts is long gone …. even to the person who ran the
company ( = me ) ….
Simple answer:
Hook up a power supply and
Time-nuts-
It has been a couple of years since I last worked on a 4060 so I have forgotten
some of the details. Can someone remind me?
Operating the device in manual mode, I can adjust beam gain so that I get a
reading. However, ramping the control voltage over its range (which does sweep
the
Don,
The main NIST frequency standards lab is in Boulder, CO where UTC(NIST)
is maintained. They have a large ensemble of clocks, ranging from
commercial cesium clocks and H-masers to "homebrew" cesium fountains and
optical clocks. The WWV/WWVB transmitters an hour north in Fort Collins,
CO
I have been using 1 PPS from a Motorola M-12 timing module to steer a SRS
PRS-10. I recently heard that a U-Blox ZED F9P module receives both L1 and L2
and can provide much improved positional accuracy.
Would better positions translate into a smoother 1 PPS? Does anyone have
experience with
Tom,
Thank you for the paper references.
(73's) Best Regards,
John Westmoreland
AJ6BC
On Wed, Aug 12, 2020 at 8:38 PM Tom Van Baak wrote:
> Don,
>
> The main NIST frequency standards lab is in Boulder, CO where UTC(NIST)
> is maintained. They have a large ensemble of clocks, ranging from
>
What would the optimum bandwidth for a WWVB receiver be?
For the AM signal, there are three different symbols, 0.8 seconds on/0.2
sec off; 0.5 sec on/0.5 sec off; and 0.2 sec on, 0.8 seconds off.
This suggests to me that the two non-symmetrical symbols have strong
modulation sidebands at +/- 2.5
Hi,
Cool to see. How well does it perform in todays context? Still useful or
a bit too cumbersome to really use?
Cheers,
Magnus
On 2020-08-11 18:58, cdel...@juno.com wrote:
> Hi,
>
> Saw Bobs recent post mentioning the NBS DMTD system.
>
> I happen to own one of those old beasts!
>
> My
Hi
> On Aug 11, 2020, at 10:27 PM, paul swed wrote:
>
> How do the small AM WWVB clocks work then. They use the 60 KHz crystal and
> they don't actually do anything special. In measuring those clocks they are
> about 2-6 hz wide.
They pop up once a night and grab time from WWVB. The rest of
On Mittwoch, 12. August 2020 13:23:57 CEST Tobias Pluess wrote:
> On the picture `gpsdo_180_210.png` one can see the last 30 hours of my
> measured data. During this time, the DAC value need to change only by 9
> counts. I think the DAC value has a slight trend to go lower and lower,
> this is
Hi,
Please excuse my remedial question. I am looking for basic information on
an oscillator module marked as follows:
Oscillatek 2352
10.00 MHz TCVCXO
5850--012
0.0 Hz at 25C
SNDATE
42105 8707
I understand that Oscillatek is now Vectron which is now Microchip.
It has a 7-pin male
Learned List,
During the discussion of using WWVB for oscillator calibration it was mentioned
that the best accuracy the could be obtained was 1 x 10^12th.
My question is what would be the best accuracy one could reasonably expect
using any methods of comparison?
Regards,
Perrier
Hi
Oscillatek was acquired by K in the early 1980’s. K was acquired by Dover
in
the mid 1980’s. Dover acquired Vectron Labs in the early 1990’s. All data on
the
Oscillatek parts is long gone …. even to the person who ran the company ( = me
) ….
Simple answer:
Hook up a power supply and
16 matches
Mail list logo
