Ahem!
Ethernet over powerline!
NOT PoE!
The various forms of ether over power are (for practical purposes) a
wireless ethernet protocol coupled into the AC wiring.
And yes, it is noisy timing wise, for all the same reason that a
simplex/shared variable rate 802.11 system is.
On 2/10/13
On 2/11/2013 10:35 AM, time-nuts-requ...@febo.com wrote:
It is unlikely to add much noise. The PoE device only puts a DC bias
on the twisted pair. The data signal is differential. It is
transformer couple to is pretty much is immune to common mode noise.
So even iif the DC bias was noisy I
All,
Strangely today the jitter numbers seem to be behaving themselves! Nothing
has been done to the set up.
Thanks to everyone for their comments. I'm looking at putting a direct
Ethernet cable in here to see what the difference might make.
Attached is a picture of latest NTP Monitor readout.
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of David J Taylor
Sent: 11 February 2013 16:13
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Possibly off topic - Jitter on Ethernet overpower
adapters
I use a number of power line switches in my home environment. Primarily
Insteon devices which are similar, but much improved version of the X-10
products.
For powerline communications, the data bursts are timed with the
zero-crossing point of the power line signal. This implies that some
Ed, Bob,
This morning I noticed the crystal control voltage was down to 11 volts. I'll
let it keep running to
see if it drops any further. The tuning capacitor is adjusted out about as far
as I want to set it. Any
further and I think the adjustment screw will fall out. I did remove C11 as an
It is possible to open the can if you are careful. A good vacuum desoldering
tool is a good start to remove as much of the solder as possible. Then one
would peal the can open a bit at a time. Then you need to find out where the
failure is.
But to answer your question, yes just buy one, it's
I'm intrigued by the possibility of using a lightweight web server to
provide a management/user interface to test equipment or appliances
(e.g. like the NTP server recently discussed, or a box with mixers and
counters).
I've built some web interfaces to very small things using Arduinos and
There are numberous web servers that are small and light weight, some
examples are boa ( www.boa.org ) and HTTPd
http://www.nongnu.org/mini-httpd/
On Mon, 2013-02-11 at 14:01 -0800, Jim Lux wrote:
I'm intrigued by the possibility of using a lightweight web server to
provide a management/user
If you just want to static-serve the assets in a particular folder, and have
python available, there's always:
python -m SimpleHTTPServer
…which serves the current directory on localhost:8080. But no PHP.
For a modern approach you might look at building a small server based on
I used thttpd many years ago. It is tiny and fast. There are others.
Joe Gray
W5JG
On Feb 11, 2013 3:01 PM, Jim Lux jim...@earthlink.net wrote:
I'm intrigued by the possibility of using a lightweight web server to
provide a management/user interface to test equipment or appliances (e.g.
like
I bought a couple of
180986059633
switches. The manual is at:
http://pdf.textfiles.com/manuals/STARINMANUALS/Altinex/Manual/Archive/Home%20Run%20(HR)%20Series.pdf
You get 8 inputs switchable to 12 outputs IN ANY COMBO. meaning it can
be a 12 output distribution amp. isolation amps all round, and
Looks like 75 ohms if I understand the manual correctly.
Joe
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Don Latham
Sent: Monday, February 11, 2013 8:00 PM
To: time nuts
Subject: [time-nuts] altinex switches
I bought a couple of
I just bought the last one at 11:30PM.
-Arthur
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
From: Jim Lux
[]
Is there something that runs under Linux on a lightweight single board
PC (Raspberry pi or Intel Mini-ITX Atom mobos) that isn't too much of a
pain, and doesn't require you to be a full time web server administrator
to make it work?
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:
I have to agree with the above. Many people
16 matches
Mail list logo
