Mike Monett wrote:
Chris
The biggest problem with the OCXO is probably that it has a square
wave output.
With careful design it is possible to achieve a jitter of a few
tens of femtosec for a logic level output from a limiter, but the
OCXO designers are unlikely to
Thanks for the tip Magnus!
One comment on the 1938 discussion: I recently fired-up my E1938
disciplined by our Fury GPSDO. It took 3+ days for the retrace (aging) to slow
down
significantly. Now it's working really well.
Said
In a message dated 4/11/2009 13:53:41 Pacific Daylight Time,
Mike Monett wrote:
If nobody has already mentioned it, Fluke.1 has the Rockwell
Tu00-D205 high performance 12-channel GPS receiver OEM modules for
$9.99 ea with free shipping worldwide, item number: 290306684157
These appear to have the 10KHz output described at
Hi Gents,
It is actually a Rockwell Microtracker gps module and not a JUPITER
board!!
5channel +5V board... also the 20pin header is different then the
JUPITER.
I still have a few docs . Please contact offline if you need more.
Rgds Ernie.
-Original Message-
From: Eamon Skelton
Steve Rooke wrote:
Hi Mark,
2009/4/13 Mark Sims hol...@hotmail.com:
Hello Steve,
Try this... take Tom's sample data set, run the numbers. Then, using a
good random number generator, make another data set by randomly throwing
out half (or more) of the samples (to simulate a non
Steve,
Steve Rooke wrote:
Bruce,
2009/4/12 Bruce Griffiths bruce.griffi...@xtra.co.nz:
Steve
Steve Rooke wrote:
If I take two sequential phase readings from an input source and place
this into one data set and aniother two readings from the same source
but spaced by one cycle and put
J. L. Trantham wrote:
Thanks for the info.
My plan is to develop a stable GPS disciplined reference suitable for use as
a reference for Microwave work in the 10 GHz range that can be used in
portable locations with relatively quick start up.
Perhaps the 1938 would be better in the shop
Fellow timenuts,
You know you are a time-nut when your spring cleanup dutines involves
getting onto the rooftop and clean your GPS antennas. In my case my dual
frequency antenna (really a survey antenna, a Novatel GPS 502 L1/L2) was
due to lack of patience temporarily put up there in a not so
Hi Magnus:
Why not just put the GPS antenna at the top of the existing TV mast?
http://www.prc68.com/I/Ant.shtml#SBant
Have Fun,
Brooke Clarke
http://www.PRC68.com
Fellow timenuts,
You know you are a time-nut when your spring cleanup dutines involves
getting onto the rooftop and clean
bro...@pacific.net skrev:
Hi Magnus:
Why not just put the GPS antenna at the top of the existing TV mast?
http://www.prc68.com/I/Ant.shtml#SBant
It would be a little bit of a challenge... I think I have some 4-5 meter
of additional heigth, the tiling is slippery and then antenna rig is
Hi Magnus:
Safety is the # 1 concern. It may be that if you can minimize the
multipath problems having the GPS antenna near the roof is not a problem?
I'm starting to do some antenna related tests using the Polaris Guide
(DAGR) GPS receiver, see:
http://www.prc68.com/I/DAGR.shtml#GLS
and scroll
2009/4/13 Magnus Danielson mag...@rubidium.dyndns.org:
But randomly throwing out data points would introduce ZDT.
It would introduce dead-time, it would not introduce zero dead-time
(ZDT). Dropping every second sample of a phase/time-error series can
maintain the zero dead-time property, but
Joseph M Gwinn skrev:
time-nuts-boun...@febo.com wrote on 04/13/2009 11:32:48 AM:
bro...@pacific.net skrev:
Hi Magnus:
Why not just put the GPS antenna at the top of the existing TV mast?
http://www.prc68.com/I/Ant.shtml#SBant
It would be a little bit of a challenge... I think I have some
Steve Rooke skrev:
2009/4/13 Magnus Danielson mag...@rubidium.dyndns.org:
But randomly throwing out data points would introduce ZDT.
It would introduce dead-time, it would not introduce zero dead-time
(ZDT). Dropping every second sample of a phase/time-error series can
maintain the zero
Magnus,
If you replace your RG-58 with RG-6 TV coax, your loss issues will
disappear. The difference in impedance (75 ohms instead of 50) is not
enough to cause problems. Adapters to the pre-fitted F connectors are
readily available. And it's not expensive.
Regards,
Peter
I recently purchased a lot of 24 volt 5 amp switching power supplies.
Well, they are marked 5 amps, but, I was able to get 7 out of them without
any problem, with the exception that my resistive load was getting too hot.
These are very nice supplies, look like an oversized laptop power supply. I
time-nuts-boun...@febo.com wrote on 04/13/2009 11:32:48 AM:
bro...@pacific.net skrev:
Hi Magnus:
Why not just put the GPS antenna at the top of the existing TV mast?
http://www.prc68.com/I/Ant.shtml#SBant
It would be a little bit of a challenge... I think I have some 4-5 meter
of
The whole purpose of taking a data set from a known ZDT counter and then
throwing out random samples is to simulate the kind of data that a normal
counter would produce. You could compare the results and get an idea of how
using a normal counter for calculating adevs would compare to using a
Mark,
Mark Sims skrev:
The whole purpose of taking a data set from a known ZDT counter and then
throwing out random samples is to simulate the kind of data that a normal
counter would produce. You could compare the results and get an idea of how
using a normal counter for calculating
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