Tom,
On 06/26/2014 04:02 AM, Tom Van Baak wrote:
Bob,
A couple of different ideas:
1) No UI at all. The surplus GPSDO favorites over the years (like the HP
SmartClock's and Trimble Thunderbolt) work with no UI. Yes, there is a PC
program you can use to monitor and control it, or even debug
Much better than room 137.
BTW, if you run into a physicist someday who can *calculate* 9192.631770 MHz
directly from quantum mechanics, ask them to calculate the other isotopes of
cesium. They should be different. But I have no idea how much or little.
/tvb
PS. At EFTF 2014 in Neuchatel,
On Wed, Jun 25, 2014 at 7:25 PM, Mark Sims hol...@hotmail.com wrote:
There is no standard interface for GPSDOs, but the Trimble TSIP interface
as used by the Thunderbolt/Lady Heather would be an excellent place to
start and include. Make the unit smart enough to run unattended, but add
If you want a common interface for GPS receivers it's NMEA and it's
relatively easy to implement. I certain would NOT translate to TSIP as
that is rather obscure. NMEA is a very common standard and many GPSes can
output NMEA.
Also you talked about serial. I hate to say it but who in 2014 wants
A great loss and a sad story, indeed.
That leaves me wondering what will happen to his software tools, which
we have grown accustomed to using. I'm not aware that he disclosed the
sources. Has anybody got access to them and can take care of them? Or
will all this good work fade away?
Cheers
Chris,
NMEA is a good 'general purpose' interface for GPS units but I thought this
thread was about the GPSDO interface. Not quite the same - TSIP/SCPI would make
rather more sense here, especially with all those Thunderbolts about :-)
Most GPS receivers still supply at least one serial
A few dumb questions:
But first a quote from the ITU ( doc G.180 )
4.1.12 (timing) jitter: The short-term variations of the significant instants
of a timing signal from
their ideal positions in time (where short-term implies that these variations
are of frequency greater
than or equal to 10
Hi
One gotcha with TISP - NEMA is that they use different units for things like
position. Yes it’s just math to translate them. No it’s not trivial on a little
tiny PIC. If the GPS in your GPSDO is a NEMA (or NEMA like) device, you either
will have a mix of TISP and NEMA or a lot of
Slightly OT, but not much, does anyone in the UK (or close) have a GPS puck
(mouse, sensor etc.) with serial NMEA output available cheaply? Ideally with
RJ11 (6P4C) connector, but I can solder ...
Thanks
Dave
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On Wed, Jun 25, 2014 at 11:14 PM, Bob Stewart b...@evoria.net wrote:
I'll look into both SCPI and TSIP, and therein lies the reason for my
original post. Essentially, have they been patented, and if so, have those
patents expired?
You almost certainly want to use SCPI which is managed by
On Thu, Jun 26, 2014 at 2:38 AM, REEVES Paul paul.ree...@uk.thalesgroup.com
wrote:
Chris,
NMEA is a good 'general purpose' interface for GPS units but I thought
this thread was about the GPSDO interface. Not quite the same - TSIP/SCPI
would make rather more sense here, especially with all
How fast does the maltese cross turn?
Regards.
Max. K 4 O DS.
Email: m...@maxsmusicplace.com
Transistor site http://www.funwithtransistors.net
Vacuum tube site: http://www.funwithtubes.net
Woodworking site
http://www.angelfire.com/electronic/funwithtubes/Woodworking/wwindex.html
Music
Yes I have... I have built several sensor type boards that use an ATMEL chip
as the processor. They output data in a TSIP packet format that tricked up
versions of Lady Heather can control and monitor. The most complicated one is
probably a LED/Battery analyzer device that measures
Check out these puppies... $16 with logic level interface, $17 with RS-232
interface. Does GPS and Glonass. Has antenna. Has 1pps outut. Can do 10 Hz
updates. I ordered 6 of the RS-232 units and they took about a week to
arrive.
I have not done anything with the 1PPS output yet. I
Hi Mark,
Thanks for the response. I'll take a look at heathgps.cpp. I had hoped not to
have to actually look through code to divine an interface, but if that's the
way it is, then OK. I am planning on the output of at least position,
corrected phase error, DAC value, ambient temperature,
I have downloaded his tools as currently available on his web site. I intend to
make them available on my web site unless I hear otherwise from someone
authorized to talk on the behalf of his estate.
Didier KO4BB
On June 26, 2014 2:38:57 AM CDT, Stefan Heinzmann stefan_heinzm...@gmx.de
USB may be a common interface to a computer but practically useless to another
microcontroller.
Everything can do serial but not everything can do USB master. In the worst
case, use a Serial-USB adapter on your PC. There is no such thing as a
Serial-USB master interface and never will there be
So does anyone know how/why he died?
Does anyone have the actual sources for his tools? All I know is that he
told me he used a very old database program to write them under Borland or
something like that..
Bye,
Said
In a message dated 6/26/2014 12:16:18 Pacific Daylight Time,
Perhaps the misunderstanding happened when I mentioned two UARTs and two tty
interfaces. Using a standard tty interface has nothing to do with how it gets
to the monitor hardware once it leaves the board. It's the same physical
interface that's used by the receiver boards; whether Adafruit,
Hello all,
I have a Datum ExactTime 9390-6000 that I use for 10 MHz output. I've
recently become interested in NTS and was wondering if anyone knows of a device
that will take some kind of IRIG output from the 9390 and provide an NTS server
on my network? Looking for something I can keep an
Mark,
Thank you that looks ideal, now all I need is a suitable weatherproof cover
and I'm in business.
Regards,
David Partridge
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Mark Sims
Sent: 26 June 2014 18:17
To:
David,
Also check the web/eBay for: GlobalSat GPS BU353 S4
Dirt cheap, well made, water proof, high performance, NMEA or binary. They come
in both USB (if you want to use them with a PC or SBC) or RS232/serial (if you
want to use them with microcontrollers or data loggers or PC or SBC). The
There are TSIP commands for doing all those things. It should be fairly easy
to adapt them to control your hardware and whatever GPS receiver you are using.
The nice thing about implementing a TSIP interface is being able to use
existing programs like Tboltmon and Lady Heather (over 30,000
Gosh, all we need to do is define a nice flexible software layer between the
GPSDO and the computer, etc. similar to ASCOM for astronomical telescopes.
That way, the layer and all its associated drivers do all the work, and
anyone's GPSDO or computer program will work if the associated drivers are
I dislike TSIP quite a bit. It's a disaster in my opinion if you are not
intimately familiar already with the Trimble binary commands, and exists in
a number of inconsistent and non-compatible dialects as far as I know. No
way for a human to enter a simple command in a simple text terminal,
Do you mean NTP server? If so the reference implementation comes with an
IRIG driver. It uses a standard audio interface ti input the signal.
Likely you already have all the hardware and software you need and only
need to mess with the configuration file.
http://adsabs.harvard.edu/abs/1957PhRv..105..590S
Cheers,
Magnus
On 06/26/2014 08:13 AM, Tom Van Baak wrote:
Much better than room 137.
BTW, if you run into a physicist someday who can *calculate* 9192.631770 MHz
directly from quantum mechanics, ask them to calculate the other isotopes of
This thread is now ready for the correct answer: http://xkcd.com/927/
/tvb
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and follow the instructions there.
I just did a little shopping after Tom's recommendation on USGlobalSat
pucks. Here is a little more detail.
BU-353-S4 is the current USB version
BR-355-S4 is the Serial version
Not as dirt cheap as Mark's unit, these close to $40 each, but
reasonable with enclosures, ready to go. In the US I
I received a new Rev C BeagleBone black this week, which identifies itself
as running the Debian distribution. I just loaded John's 5370_proc package
onto the Beagle,
ran make and it all compiled without a problem. I can't do any testing
beyond this for the time being, but I did want to let John
Rex,
Thanks for product number clarification.
Yes, I remember that I cut off the PS-2 connector before the UPS truck even
left the neighborhood. You are then left with nice 0/+5/Tx/Rx wires, which is
all you need for navigation and status. For 1PPS timing, in either the serial
or USB version,
Hi,
the maltese cross is a chopper to interrupt the lines of electrostatic force.
The cross could have a hundred legs, as long as it alternately blocks
and unblocks exposure to the electric field.
The cross spins in a horizontal plane, maybe half an inch above the sensor
electrode which is flush
The tube was probably the FP-54
http://frank.pocnet.net/sheets/141/f/FP54.pdf
No luck on finding the article - it is not in the Handbook of Projects for
the Amateur Scientist by C.L. Stong
http://www.sciencemadness.org/library/books/projects_for_the_amateur_scienti
st.pdf
I thought it might
On Thu, Jun 26, 2014 at 9:08 PM, DaveH i...@blackmountainforge.com wrote:
The tube was probably the FP-54
http://frank.pocnet.net/sheets/141/f/FP54.pdf
No luck on finding the article - it is not in the Handbook of Projects for
the Amateur Scientist by C.L. Stong
Novatel has two versions of each message one binary (ending with B) and
one ASCII (ending with A). That is one way of catering to both the
interactive use and the clean software side of the problem.
Javad (GRIL now GREIS) is my personal favorite. Your commands are ascii,
often very short. The
I just did a little shopping after Tom's recommendation on USGlobalSat
pucks. Here is a little more detail.
BU-353-S4 is the current USB version
BR-355-S4 is the Serial version
Not as dirt cheap as Mark's unit, these close to $40 each, but
reasonable with enclosures, ready to go. In the US I
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