In message ac803ca80912081747q6f45574ai7829bdfb5028d...@mail.gmail.com, paul
swed writes:
Is far as I know, you need a PDP/11 to drive it...
There is an article about hunting for a LORAN-C reflection from
a mountain-range in Mexico where they mention installing a 5000 into
a plane with some
pisym...@gmail.com said:
(no taking avergae deltas across several transactions over a heavy
utilized network).
If your network is busy, averaging is probably not what you want to do. The
sample with the minimum round trip time is likely to be the best one.
Plan B is discard lots of outliers
We sold a lot of 2100 series products over here when I worked for Austron. A
number were used up in Norway on Oil rigs as part of their telecom sync
systems. Also sold systems into Germany and France. I know this is back in
the mid/late 80's, but may be helpful.
Rob Kimberley
-Original
Suppose I want to average a bunch of samples. Sometimes it helps to discard
the outliers. I think that helps when there are two noise mechanisms, say
the typical Gaussian plus sometimes some other noise added on. If the other
noise is rare but large, those occasional samples can have a big
In message 20091209105308.17c67b...@ip-64-139-1-69.sjc.megapath.net, Hal Murr
ay writes:
For one dimension, you sort, compute the average, then compute the distance
of the first and last samples from the average. Discard the one that is
farther from the average.
You want to use the median
To All Time-nuts Members,
Harvard-Smithsonian Center for Astrophysics is making a non-profit
educational series on Physics for the 21st century for the Annenberg
Media Foundation. One of the shows is on atomic clocks. If any of you
have and are copyright owners of high resolution images
I was thinking that I might be reinventing the wheel by designing a
buffer amp. You guys have almost built the entire car! Thanks again
for the ideas. It'll take me a while to get it built and tested.
Ed
Bruce Griffiths wrote:
John Miles wrote:
If it helps I can send you some LTSpice
To All Time-nuts Members,
Harvard-Smithsonian Center for Astrophysics is making a non-profit
educational series on Physics for the 21st century for the Annenberg
Media Foundation. One of the shows is on atomic clocks. If any of you
have and are copyright owners of high resolution images of
Hi all,
indeed this is very interesting, can this buffer amplifier be used as
a building block for a distribution amplifier for the 10 MHz signal of
a thunderbolt? I remember having seen on the list a similar version
but with european transistors (like the ubiquitous bc548/bc558?) that
are very
Francesco
Yes, just keep the gain of each stage low and cascade 2 or3 if you need
higher reverse isolation.
Since the input impedance is around 1k (predominantly capacitive) at
10MHz you can drive several in parallel from a 50 ohm source.
If needed you can add a bridged T-coil network at the
Hello Bruce,
On 12/9/09, Bruce Griffiths bruce.griffi...@xtra.co.nz wrote:
Francesco
Yes, just keep the gain of each stage low and cascade 2 or3 if you need
higher reverse isolation.
Since the input impedance is around 1k (predominantly capacitive) at 10MHz
you can drive several in
Yes. I just built one. It was an original design based around the parts I
could scrounge. My cost was around $200 and it took me about 2 months to
complete. I don't know of any kits or any commercial units available in
that price range.
But, remember that Rubidium just gets you a stable
On Wed, 09 Dec 2009 15:08:15 +1300, you wrote:
Another point is the LTSpice LED model isn't particularly accurate for
simulating the effects of temperature variations.
Does anyone knows of more accurate LTSpice compatible LED models?
The LED model voltage drop increases with temperature even
Francesco
francesco messineo wrote:
Hello Bruce,
On 12/9/09, Bruce Griffithsbruce.griffi...@xtra.co.nz wrote:
Francesco
Yes, just keep the gain of each stage low and cascade 2 or3 if you need
higher reverse isolation.
Since the input impedance is around 1k (predominantly capacitive)
Hi, Mike --
Correct, that's not a bug, and it won't change unless/until the program is
rewritten with a new graphics library.
In fullscreen mode there's no window border, so the 1024x768 display surface
can accommodate the 1024x768 client area. When you hit F11 to go back to
windowed mode on a
This is the new version of Heather... she does windows of all sizes now.
There are several supported standard screen sizes. You can also specify a
custom screen size with the /vc=rowsXcolumns command line parameter.
Try it with /vc=1280x768 on the command line. If it does not come up
Oh, I thought it was my PC.
Neat John, we like recycled code.
The KE5FX remote access is fun too, works well.
I'm surprised that your antenna receives so well,
being at -7.6 m. Doesn't it get wet?
(I know; I'm just trying to be funny)
Mike - AA8K
John Miles wrote:
Hi, Mike --
Gerhard Hoffmann wrote:
On Wed, 09 Dec 2009 15:08:15 +1300, you wrote:
Another point is the LTSpice LED model isn't particularly accurate for
simulating the effects of temperature variations.
Does anyone knows of more accurate LTSpice compatible LED models?
The LED model voltage drop
That graphics library is 95% post-consumer fiber at this point. :( It's
good for rapid development and porting work but as you can tell it's pretty
rough around the edges.
Every time I run a survey on a Thunderbolt here, it seems to want to find
itself at the bottom of the lake. Bruce pointed
More accurately (pun intended) the GPS receiver first calculates the
height above the ellipsoid that approximates the earth's surface and
then uses a geoid separation table to calculate the height above MSL.
Due to storage constraints the geoid separation table may necessarily be
inaccurate.
For more detail see:
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA407319Location=U2doc=GetTRDoc.pdf
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA407319Location=U2doc=GetTRDoc.pdf
Bruce
Bruce Griffiths wrote:
More accurately (pun intended) the GPS receiver first calculates the
height above the
As far as I can tell from the Thunderbolt documentation the location is
reported in WGS84 coordinates.
One then has to correct for the Geoid separation to get height above MSL.
My thunderbolt reports an altitude of +65m whereas google earth and my
M12+T both report a height of +43m.
Bruce
22 matches
Mail list logo
