Yes, this switch matrix seems intended for video signals, so 75 ohms is
the expected standard. I doubt that would be much of a problem for 50
ohm timing signals. Some of us shall see soon. BNCs may be 75 ohm
versions too, but probably not a big issue.
On 2/11/2013 6:20 PM, J. L. Trantham
I like to use mongoose
http://code.google.com/p/mongoose/
The project page says 50Kb executable, although it balooned up to 63K the
last time I built it.
On Feb 11, 2013, at 3:01 PM, Jim Lux wrote:
I'm intrigued by the possibility of using a lightweight web server to
provide a
On 2/11/13 10:20 PM, Chris Albertson wrote:
On Mon, Feb 11, 2013 at 10:04 PM, David J Taylor
david-tay...@blueyonder.co.uk wrote:
Anything which works on the Raspberry Pi must be fairly lightweight! G I
don't think that basic Apache would be too much to manage, and many folk
have used it:
Before you know it, you are going to find that not having php (or Python, or
Perl, or whatever your favorite scripting language is) is crippling. I
recommend you bite the bullet and get a small ARM SBC big enough to run a full
Linux distro. I use a TS-7553 from embeddedarm.com with great
I tend to agree with this notion of not going with the cheapest SBC
possible. Unless you are going to incorporate the PI in a number of
devices (i.e. will be buying multiple units), it makes more sense to
toss in the extra hundred dollars and get a more capable SBC. For one
thing, you need the
On 2/10/2013 6:04 PM, Magnus Danielson wrote:
You should read TCP/IP as Internet Protocols (notice plural form
here). It points to the stack of protocols,
Actually, no. IP is Internet Protocol, singular, and is the L3 (mostly -
IP predates the ISO/OSI model layers, so IP suite protocols don't
If you decide to go with one of the SBCs at embeddedarm.com, I have a Wiki page
on my web site documenting how I have set mine up.
Didier
Www.ko4bb.com
Sent from my Droid Razr 4G LTE wireless tracker.
-Original Message-
From: Jim Lux jim...@earthlink.net
To: Discussion of precise
Fellow Time Trackers,
Does anyone happen to have an Odetics GPStar Plus (their model 565, if I
recall) with the rubidium option installed?
If so, could I bother you for some detailed photos of the innards,
particularly the main PC board jumpers, the additional power supply and
I think those SBCs have insufficient RAM (128M on the biggest board.) . 512M
seems to be OK (which is where most community boards are at). The Panda ES is
double that.
Now those SBC have sata ports, so swap space isn't quite as detrimental as on
SBCs that use the SDHC for swap. Still, I
Sorry to say have GPStars. But no RB. From my experience with the gpstar a
RB is sort of a waste. It did not seemed to be intent on that level of
accuracy. It jumps along correcting.
Its use case seemed to have been a time source for the likes of radio
stations. Very accurate for that purpose. But
Fellow time-nuts,
Again I feel that it is good that I do not trust the samples I have been
given, but start by measuring them. Again I have found a sample where I
have systematic noise from the oven controller. Looking at the frequency
plot, I see triangle shaped frequency modulation and the
Thanks for the details, Mike.
I read TCP/IP as TCP over IP, because TCP can be used with any
data link layer that doesn't guarantee delivery.
OTOH, the first book I read about the Internet protocols was titled
TCP/IP so there is a tendency to lump then together. I've read that
the developers of
Insufficient RAM for what applications? (not argumenting, just curious, since
it has been running Apache and a couple of services just fine)
I understand 64MB (like the board I use) is a little skimpy by today's
standards, but when you don't run a GUI, it goes a long way.
Didier
Sent from my
David,
Thanks for posting that. I'm currently doing some testing over wifi
links myself, and found that page very useful. You do a really good job
documenting your experiences with GPS-based NTP refclocks, and I
appreciate all the hard work.
I just wanted to ask though, are you compiling your
On 2/12/13 10:11 AM, Didier Juges wrote:
Before you know it, you are going to find that not having php (or Python, or
Perl, or whatever your favorite scripting language is) is crippling. I
recommend you bite the bullet and get a small ARM SBC big enough to run a full
Linux distro. I use a
Magnus,
Two things to check.
1) Is the bump you see at all correlated to the relative frequency between the
two oscillators? I have seen this when comparing two ULN, for example. You can
make the bump move left or right depending on the beat frequency.
2) Some oscillators have separate oven
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