A number of people have reported issues with the Raspberry Pi Ethernet hardware
when used for NTP, as it is actually a USB-Ethernet bridge and the drivers may
not be all they could be. I have not had problems myself but I do not run NTP
on it.
The Beaglebone Black (BBB) is supposed to be better
Yes the BBB has about twice or more the performance over the Pi except in
graphics. The Pi has a faster GPU. But in the case of an NTP server you
likely would never connect a monitor or keyboard to the computer so the GPU
will go unused.
However the NTP is very un-demanding and will only see on
A number of people have reported issues with the Raspberry Pi Ethernet
hardware when used for NTP, as it is actually a USB-Ethernet bridge and the
drivers may not be all they could be. I have not had problems myself but I
do not run NTP on it.
The Beaglebone Black (BBB) is supposed to be better
I'm running Meinberg NTP on the Windows 7 x64 machine to which my Thunderbolt
is attached.
I'd like to be able to share the serial port between LH and NTP so that I can
run the machine as an NTP Stratum 1 server locked to the TB, and also be able
to use LH to check things.
I looked around the
I'm running Meinberg NTP on the Windows 7 x64 machine to which my
Thunderbolt is attached.
I'd like to be able to share the serial port between LH and NTP so that I
can run the machine as an NTP Stratum 1 server locked to the TB, and also be
able to use LH to check things.
I looked around
It's not going to work.
If the purpose of running the Thunderbolt is only to drive NTP then
you don't need LH. NTP's only tags the pulses to the nearest
microsecond, nano sec on accuracy is lost on NTP. I'd even say the
TB is the wrong GPS for NTP. It costs to much and uses to much power.
Here is interesting topic about NTP on Raspberry PI (typical usage of
ARM and Linux bread on top of it)
http://www.synclab.org/?tag=testing
Basically, TCP stack on ARM usually come from one source - its a Adam
Dunken TCP stack. Then its is MII part and the hardware which doing
Ethernet.
I have some problems with My 8505A
Analyzer, it has no RF output, I checked the YTO and other frequency dividers
and it appears to be OK some times there is RF output only it will not tune and
it seems to cut out as I tune trough the frequency range.
Thank You
Sal C. Cornacchia Electronic RF
Ummm think you sent the question to the wrong group perhaps?
On Wed, Feb 26, 2014 at 12:50 PM, corc...@yahoo.ca wrote:
I have some problems with My 8505A
Analyzer, it has no RF output, I checked the YTO and other frequency
dividers
and it appears to be OK some times there is RF output only
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david.partri...@perdrix.co.uk said:
I looked around the with Google, and saw *numerous serial port splitters.
Which is recommended?
If your lines are short, you don't need fancy hardware. The RS-232 driver
will drive 2 lines. Just take 2 cables, cut them in half, connect the
wires...
On Wed, Feb 26, 2014 at 12:32 PM, Chris Albertson albertson.ch...@gmail.com
wrote:
You can NOT control a GPS from two ports. Both NTP and LH will try to
send commands to the GPS.
Actually the Palisades driver doesn't send commands to the Thunderbolt. It
sends a single invalid command
On Wed, Feb 26, 2014 at 9:53 AM, d0ct0r t...@patoka.org wrote:
Here is interesting topic about NTP on Raspberry PI (typical usage of ARM
and Linux bread on top of it)
The article addresses using the Pi as an NTP server with stratum 0.
In other words as an NTP server that uses another NTP
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From: Chris Albertson
[]
Except as an exercise there is almost no point any more using GPS to
drive a local NTP server if you have a very good Internet connection.
My fiber Internet connection is as good as Ethernet as the Pool
Servers work well for me. Those using slower or a widely shared
On Wed, Feb 26, 2014 at 11:15 AM, David J Taylor
david-tay...@blueyonder.co.uk wrote:
The Raspberry Pi with GPS/PPS certainly beats any internet connection I've
ever had delivered to this house, though:
Yes it will. But the point of the server is to deliver time to other
computers. The the
From: Chris Albertson
Sent: Wednesday, February 26, 2014 7:32 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Serial port splitter s/w
On Wed, Feb 26, 2014 at 11:15 AM, David J Taylor
david-tay...@blueyonder.co.uk wrote:
The Raspberry Pi with GPS/PPS
Chris, even with Wi-Fi connected computers, mostly running Windows, there
is a huge difference between talking to a stratum-1 server on my LAN
compared to running just Internet servers. Our experiences differ, as I am
on a cable modem connection from the UK's Virgin Media. Folks need to
On Wed, Feb 26, 2014 at 2:05 PM, Chris Albertson
albertson.ch...@gmail.comwrote:
Chris, even with Wi-Fi connected computers, mostly running Windows, there
is a huge difference between talking to a stratum-1 server on my LAN
compared to running just Internet servers. Our experiences differ,
Subject: Re: [time-nuts] Serial port splitter s/w
The Raspberry Pi with GPS/PPS certainly beats any internet connection I've
ever had delivered to this house, though:
http://www.satsignal.eu/ntp/Raspberry-Pi-NTP.html
http://www.satsignal.eu/mrtg/performance_ntp.php
Cheers,
David
--
SatSignal
Serial outputs can usually drive several serial inputs if the cables are
short (to avoid reflections). You can wire it yourself, serial out from
the TB to both LH and NTP, serial in from LH only.
David
On 2/26/14 11:51 AM, David J Taylor wrote:
I'm running Meinberg NTP on the Windows 7 x64
On Wed, Feb 26, 2014 at 1:30 PM, David C. Partridge
david.partri...@perdrix.co.uk wrote:
You guys have me persuaded - I'll get a Raspberry Pi ...
You might want to think a little more about which to get. The Pi is OK and
will work fine but look at BeagleBone Black. It's a little nicer for
From: Chris Albertson
You might want to think a little more about which to get. The Pi is OK and
will work fine but look at BeagleBone Black. It's a little nicer for
hardware hackers. Cost is $5 different. You can read specs and the
respective forums.
One thing to watch out for is that all
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