Hello everyone,
I am new to the list and currently looking for a timing standard for a
VLBI application. After some searching I have decided to use two
thunderbolts for a first attempt and now have some questions regarding
the different available versions.
There seem to be two types of
Markus Kern wrote:
Hello everyone,
Hi,
I am new to the list and currently looking for a timing standard for a
VLBI application. After some searching I have decided to use two
thunderbolts for a first attempt and now have some questions regarding
the different available versions.
There
David C. Partridge skrev:
Yes, Windows always seems to think a Thunderbolt is an MS mouse. Look back
in the archives about using /Fastdetect in boot.ini (BTW this doesn't work
with WinXP 64 - so I had to disable the serial mouse in the devices).
The cure for that is very old - don't have the
HOWEVER-- if I close the LH display and open it back
up shortly thereafter, all my T-bolt running parameters
start fluctuating wildly and going off-scale. Even the
yellow temp line goes off scale and PPS OADEV and OSC OADEV
both drop back to a high e-12.
At what tau values, though? The
I believe that the blue trace (#3) on the last figure from John Miles'
page [3] is with the integrated 24 to -12, +12, +5 V PSU. So you are
better off buying a cheap barebones Thunderbolt and a cheap linear PSU.
That's my thinking, assuming the currently-available surplus ones all have
On 2/21/09, Magnus Danielson mag...@rubidium.dyndns.org wrote:
I'm considering a Linux port since I want to reduce my dependency on
Windows at all times.
before knowing about the existence of lady heather I had started
coding a very simple Linux/Unix program that would work much like
Hi,
Here are some results of the FTS 1200 and FTS 9110 oscillators I have
recently tested.
1SEC 10SEC100SEC
1200 1 7.14-13 1.48-12 1.92-12
1200 2 3.29-13 1.80-13 3.28-13
1 and 2 above previously tested
1200 1B 4.00-13 5.50-13
Markus Kern wrote:
Hello everyone,
I am new to the list and currently looking for a timing standard for a
VLBI application. After some searching I have decided to use two
thunderbolts for a first attempt and now have some questions regarding
the different available versions.
There seem to
I got around to tearing into the Thunderbolt this afternoon and after
testing the serial port and traces in every way I could I found the
problem... The power supply (which got with it in the TAPR buy) went
south apparently. I got a 24v difference between pins 1 6 but when
you checked them
For observations at 1420MHz, and short integration times (~ 100sec) the
phase error needs to be 100ps or less.
For longer integration times (10,000 sec is desirable) and higher
frequencies the timing constraints are far more stringent.
Whilst clock modeling can be used to improve performance
I currently have an HP Z3801A, which seems to be running well. I've been
looking at the T-Bolts on Ebay for a while, but have been holding off buying.
This post just gave me an opportunity to ask some questions.
I've seen references to the TAPR group buy in previous posts. It obviously
Tom Van Baak wrote:
For observations at 1420MHz, and short integration times (~ 100sec) the
phase error needs to be 100ps or less.
For longer integration times (10,000 sec is desirable) and higher
frequencies the timing constraints are far more stringent.
Whilst clock modeling can be used to
On 2/21/09 5:20 PM, Bruce Griffiths bruce.griffi...@xtra.co.nz wrote:
Tom Van Baak wrote:
For observations at 1420MHz, and short integration times (~ 100sec) the
phase error needs to be 100ps or less.
For longer integration times (10,000 sec is desirable) and higher
frequencies the timing
From: Dave M masond...@comcast.net
To: time-nuts@febo.com
Sent: Saturday, February 21, 2009 7:13:09 PM
Subject: Re: [time-nuts] Different Thunderbolt versions
I currently have an HP Z3801A, which seems to be running well. I've been
looking at the T-Bolts on
- Forwarded Message
From: Stanley Reynolds stanley_reyno...@yahoo.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Saturday, February 21, 2009 7:48:06 PM
Subject: Re: [time-nuts] Different Thunderbolt versions
I currently have an HP Z3801A, which seems to be running
well. I've been looking at the T-Bolts on Ebay for a while, but
have been holding off buying. This post just gave me an
opportunity to ask some questions.
I've seen references to the TAPR group buy in previous posts.
It obviously
Tom,
Don't forget to save a few squares !
BillWB6BNQ
Tom Van Baak wrote:
This is an interesting TF problem, actually. It depends what
you mean by it. If it goes means the paper itself -- if you
pull at a constant linear rate then it goes neither slower nor
faster. It's constant and
At 09:51 PM 2/21/2009, Tom Van Baak wrote...
So hang on a bit longer and I'll send the details next month.
Note a number of people have asked privately (you know who
you are) and those requests will be handled first.
Since you've opened a can-o-worms here, I'll put my name in the hat for
one of
On Sat, 2009-02-21 at 11:42 -0500, Chuck Harris wrote:
Magnus Danielson wrote:
I'm considering a Linux port since I want to reduce my dependency on
Windows at all times.
If you do, welcome! Please take a trip to:
http://counter.li.org/
You might also be interested in my account of
19 matches
Mail list logo
