Thanks for your responses and the links.
My DQ3, Can I deduce offset from jitter comes from the following and while
Bill's response was a succinct NO, I am still wondering.
Maybe it's my interpretation of nominal and ideal. Here is scenario :
I have a 1PPS which is offset from a reference
Hi,
If you have a 1PPS the nominal rate is exactly 1 Hz. If your PRS-10 runs at
+750 ns on every pulse then it has a frequency offset of 750E-9=7.5E-7 from the
nominal frequency. You can expect jitter and wander on the PPS, as deviations
from the frequency it has.
Cheers,
Magnus
div
Hi
With some of the HP gear the 10811 is “dead” when you use the external
reference. With most of the gear, the 10811 is locked to the external
reference. It sounds like your device is in the second category. It locks the
10811, so you need to adjust the 10811 to be close to correct in order
mag...@rubidium.dyndns.org said:
If your PRS-10 runs at +750 ns on every pulse then it has a frequency offset
of
It took me a while to parse that correctly.
In case anybody else is having the same problem, it works better for me if it
says something like:
If your PRS-10 offset gains
I know of NPL in the UK, and NIST in the USA, but is anyone aware of
other standard labs. In particular I am looking for the Australian
equivalent. A Google search came across Standards Australia
http://www.standards.org.au/
but I don't know how authoritative this is. There is basically
nothing
Hi,
it used to be called NSL, National Standards Laboratory, part of the CSIRO.
Now it appears to be called National Measurement Institute, (NSI)
and seems to be located mainly at Lindfield NSW.
http://www.measurement.gov.au/Pages/default.aspx
See if that works,
Cheers,
Neville Michie
On
Hi
Over here NIST is very much part of the government. In many cases, if I want a
certain gizmo calibrated, I would not / could not send it there. It either
would be fairly expensive or simply something they don’t do. In the case of 50
ohm terminations, ours go back to Agilent / HP / Keysight
yesterday there was an other response too he had a good suggestion
follow up with that also, set the marker on the carrier and count the
markers frequency, I wil power up my one I have a 8563 and will watch
how it is behaves and let you know
73
KJ6UHN
Alex
On 6/28/2014 7:25 PM, Hui Zhang
John welcome to time nuts. This won't be a super long post have other
things to do.
Search for d-psk-r and you can see a few of my exploits. Summation. It
ain't easy.
It appears to be really easy unless you are far away like the east coast.
Then the propagation gods enter into the picture along
Hello to the group. Been a while.
Wanted to update the group on the WWVB remodulator that allows receivers
like the spectracom 8170, Netclock 2 and Truetime DC60 to work with the new
BPSK signal and display accurate time.
The plan had been to leverage the accurate d-psk-r 60 Khz clock for the
Hello:
I am afraid I made a dumb mistake, I ignored a calibration procedure in the
page 3 of manual, it's too front in the book so I missed it, I am very sorry.
The procedure is:
1, Connect CAL OUTPUT to SIGNAL INPUT 2.
2,Press [INSTR PRESET], [RECALL], [9] on the analyzer.
Scott,
Could I ask you to post that C crap someplace? Would save me and
others some time.
This temperature thing is complex enough that I'd like to try some experiments.
I want to run an FE5680 in an unheated attic where the temperature
swings 40F and then plot some data.
On Fri, Jun 27, 2014
At 11:01 AM 6/29/2014, Chris Albertson wrote:
Scott,
Could I ask you to post that C crap someplace? Would save me and
others some time.
It was posted back in 2012:
http://n5tnl.com/time/fe-5680a/control/fe5680_logger.c
Beware that the comments may be inaccurate. We now know more about
the
On 6/29/2014 8:33 AM, Hui Zhang wrote:
Hello:
I am afraid I made a dumb mistake, I ignored a calibration procedure in
the page 3 of manual, it's too front in the book so I missed it, I am very
sorry.
The procedure is:
1, Connect CAL OUTPUT to SIGNAL INPUT 2.
2,Press
Thanks Paul. I thought that this would be a simple project. But, I'm
seeing that random phase jump problem on every method I've tried so far. My
first attempt was a 2N that would go into saturation on the plus cycle,
then into a flip-flop. I ended up with the phase problem on the 60 KHz
Hui
That calibration procedure is meant to be run at the beginning of every
critical measurement run and when ambient conditions change more than a few
degrees.
Sent from my iPad
On Jun 29, 2014, at 11:33 AM, Hui Zhang ba...@163.com wrote:
Hello:
I am afraid I made a dumb mistake, I
At 01:08 PM 6/29/2014, John Reed wrote:
... But, I'm seeing that random phase jump problem on every method I've tried
so far.
Have you tried a Schmitt trigger?
Dale H. Cook, GR / HP Collector, Roanoke/Lynchburg, VA
http://plymouthcolony.net/starcity/radios/index.html
thank you for that info, 2kHz bandwidth is a big problem for me, since a
very strong -- approx 20dB above the desired -- and not so stabile
carrier is just 700 Hz away --upward -- from the desired 60kHz, a to
narrow bandwidth is also a problem since it converts the phase
modulation into
To be very clear the remodulator is only for clock systems that display
time as I have listed above.
It will not fix 117, 599, 207s 8163 or any other phase tracking system.
That said the remodulator fixs about 50% of whats out there.
I am collecting emails from several people so will email
The phase jumps are a killer and I assure you if a simple approach like
limiters multipliers would work and I have done everyone of them that would
have been the answer.
Ya know it just can't be that hard. Guess what it actually is that hard.
Darn, but that is the cost of learning. Nothings for
On 2014-06-29 04:33, Dr. David Kirkby wrote:
I know of NPL in the UK, and NIST in the USA, but is anyone aware of
other standard labs. In particular I am looking for the Australian
equivalent. A Google search came across Standards Australia
http://www.standards.org.au/
but I don't know how
Paul,
Given the long evolution of the project, and the fact that even at the end,
classic receivers like the hp 117A and Tracor 599 still won't work with a
remodulator -- can you revisit the synchronous decoding idea I suggested?
That is, if the local receiver has a pretty good idea of UTC to
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