Generator? I know there is a decoder in NTP.I thought the only
generator was the WWVB timecode generator in the "test" directory.In
any case NTP work the same all the various platforms as I think there is
only one source distribution.
I use OS X too. I find the best way to locate softwa
; 13. IRIG-B decoder schematic (Tim Shoppa)
>>
>>
>> --
>>
>>
>> --
>>
>> Message: 9
>> Date: Sun, 24 May 2015 10:33:47 +0300
>> From: Esa Heikkinen
>> To: Discussion of precise time and frequency measurement
>>
>>
chematic (Tim Shoppa)
>
>
> --
>
>
> --
>
> Message: 9
> Date: Sun, 24 May 2015 10:33:47 +0300
> From: Esa Heikkinen
> To: Discussion of precise time and frequency measurement
>
> Subject: Re: [time-nuts
Joseph Gwinn kirjoitti:
When I last used IRIG-B005, the vendor (Symmetricom?) said it was good
for a few meters only on shielded twisted pair. I recall that the
handling of shield grounds was strange. This was OK, because the
signal was confined to one cabinet, and it worked just fine.
But t
>> It's util/tg2.c
> How do I get hold of the code? Is it in the NTP distribution,
> versus all by itself somewhere?
It's in the normal distribution. Tar file available from:
http://support.ntp.org/bin/view/Main/SoftwareDownloads
--
These are my opinions. I hate spam.
_
Multiple answers interspersed below. Joe
On Fri, 22 May 2015 12:00:02 -0400, time-nuts-requ...@febo.com wrote:
> Send time-nuts mailing list submissions to
>>
> Message: 5
> Date: Thu, 21 May 2015 22:22:12 -0400
> From: Joseph Gwinn
> To: time-nuts@febo.com
> Subject
Joseph Gwinn kirjoitti:
I prefer the DC level shifted variant of IRIG-B.
I like and use IRIG-B00x too, but it only reaches a few meters, versus
the required tens of meters.
It's differential RS485-alike bus (with TS2100 at least) using 5V
signalling level. It works easily more than few meter
time and frequency measurement
> >
> > Subject: Re: [time-nuts] IRIG-B audio decoder circuits and ICs sought
> >
> > See for example the Truetime 820 decoder. Discriminators, One-shots, and
> > Flip-Flops with pots to tweak the levels.
>
> Hmm. Interesting. URL?
>
I
I remember the need to use assembly also. But those days are gone for
two reasons (1) modern optimizing compilers are so good that they can
beat hand written assembly. and (2) Today CPUs are cheeper than
software engineers. Back in the 70's it was the other way around.
And NO, using C is hardly
joegw...@comcast.net said:
> I recall that there are audio files with real IRIG-B12x signals in them,
> for testing. Does anyone recall where these files are?
There is a program in the ntp package that generates IRIG audio from the
local system clock. It says IRIG-B, but I don't know about t
On Wed, 20 May 2015 12:00:01 -0400, time-nuts-requ...@febo.com wrote:
>
> Message: 1
> Date: Wed, 20 May 2015 09:19:47 -0500
> From: "Graham / KE9H"
> To: Discussion of precise time and frequency measurement
>
> Subject: Re: [time-nuts] IRIG-B audio
idium.se
> Subject: Re: [time-nuts] IRIG-B audio decoder circuits and ICs sought
>
> --
> Joe,
>
> On 05/19/2015 03:51 PM, Joseph Gwinn wrote:
>> I'm studying up on how IRIG-B decoder circuits work. What are the good
>> approaches, th
Be aware that there are about 100 variations on "IRIG B", that is, B000
through B257.
You should obtain a copy of "IRIG STANDARD 200-04", the 2004 version,
which I believe is the most current. It is available on line, if you
Google for it.
--- Graham / KE9H
==
On Tue, May 19, 2015 at 8:11 PM, N
Joseph Gwinn kirjoitti:
I'm studying up on how IRIG-B decoder circuits work. What are the good
approaches, the bad approaches, especially in the presence of noise?
(I asked on the NTP group, with little result beyond the C/C++ decoder
software written for the audio channel of a 1990s Sun wor
A bc635 can be had on eBay for almost nothing. It's not a pleasant piece of
gear, but this is one task it can help you with greatly.
Tools exist to let you analyse the stream extensively, and the Api is
trivial to learn -but not super featured at the high level.
On Tuesday, May 19, 2015, Tim Shop
Joe,
On 05/19/2015 03:51 PM, Joseph Gwinn wrote:
I'm studying up on how IRIG-B decoder circuits work. What are the good
approaches, the bad approaches, especially in the presence of noise?
(I asked on the NTP group, with little result beyond the C/C++ decoder
software written for the audio chan
See for example the Truetime 820 decoder. Discriminators, One-shots, and
Flip-Flops with pots to tweak the levels.
Tim N3QE
On Tuesday, May 19, 2015, Joseph Gwinn wrote:
> I'm studying up on how IRIG-B decoder circuits work. What are the good
> approaches, the bad approaches, especially in the
You've probably already discovered this site, but in case you or others
haven't, I get my Arduino goodies from here -
http://www.adafruit.com/
and a related site -
http://www.ladyada.net/
I've ordered twice and it was quick and easy to Canada
Darrell
On 10-12-14 10:19 PM, Bruce Lane wro
Sent: December 15, 2010 23:57
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] IRIG-B with Arduino
The 168 is it's junior cousin, and it's available.
Sent from my Banana jr (tm) Mobile Device
On Dec 15, 2010, at 7:21 PM, "Bruce Lane"
wrote:
&g
Thanks, Chris. Between that and what I've found already, I think this
is very do-able.
Keep the peace(es).
*** REPLY SEPARATOR ***
On 15-Dec-10 at 21:52 Chris Albertson wrote:
>Loks like I need to make myself clear also. Sorry. When I said
>develop on the des
Loks like I need to make myself clear also. Sorry. When I said
develop on the desktop I meant for a desktop target. Writing code
this is to run on the desktop is far easier then wrioting code that is
to run in a micro controller. Of course in both cases to type and
edit using ther desktop machi
The 168 is it's junior cousin, and it's available.
Sent from my Banana jr (tm) Mobile Device
On Dec 15, 2010, at 7:21 PM, "Bruce Lane" wrote:
>Hmm! Hadn't heard that... Any other Atmel DIPs among the AVR family you'd
> suggest?
>
>Thanks.
>
> *** REPLY SEPARATOR ***
I must not have made myself clear. I certainly plan to use the
development environments on my PC. That is, after all, why I loaded up AVR
Studio and the IAR packages.
Can you provide a link for the NTP thing you mention?
Thanks.
*** REPLY SEPARATOR ***
On Wed, Dec 15, 2010 at 6:23 PM, Bruce Lane wrote:
> . I'll be learning both C and AVR assembler as I go along, but the
> way I learn best is to actually DO something with programming ...
I agree with the last part. Learn by doing some real project. But
no the first part. The best
Hmm! Hadn't heard that... Any other Atmel DIPs among the AVR family
you'd suggest?
Thanks.
*** REPLY SEPARATOR ***
On 15-Dec-10 at 18:44 Eric Garner wrote:
>You may want to avoid the 328p. for the last year there have been supply
>problems to the distributors.
You may want to avoid the 328p. for the last year there have been supply
problems to the distributors.
-eric
Sent from my Banana jr (tm) Mobile Device
On Dec 15, 2010, at 6:23 PM, "Bruce Lane" wrote:
>In fact, I was looking very hard at the 328P. AND I just happen to have an
> STK500 on
Already a bit ahead of you, Don. The Mega just happened to be the one I
started with. I selected it because I found details online for someone who used
the Mega to construct a clock which runs from decoding NMEA sentences, and I'm
using his source code to help me along.
Keep the
That's the thing. I don't want to have to rely on PC hardware. I really
want to make something which is stand-alone, and can be wired to a variety of
displays.
Keep the peace(es).
*** REPLY SEPARATOR ***
On 14-Dec-10 at 22:59 Chris Albertson wrote:
>If the goa
In fact, I was looking very hard at the 328P. AND I just happen to have
an STK500 on the way from the east coast (thanks to an Ebay purchase).
Already got AVR Studio installed, and I also have IAR's AVR package
standing by. In short, I've got plenty to learn with.
And yo
FWIW, if you're looking for a cheap, very capable AVR dev board. i've
had very good success with the Teensy. You can use AVR-GCC or
assembler but it has an Arduino compatibility layer if thats your
thing.
http://pjrc.com/teensy/index.html
they're cheap and easy to work with, US made, and have gre
If the goal is to learn about AVRs that is a good project. But if you
want a cheap IRIG decoder I bet you already have one. An IRIG driver
is included with NTP. The NTP driver reads the time code from an
audio interface set for 8Khz sample rate.If you are writing a
decoder it might be good t
Bruce: You may not need the Mega. I started with the arduino in
duemilanuove, and found that there are chips with the bootloader available.
The IDE is actually pretty good, not too steep, and there are libraries
available for lots of peripherals and lots of sample code. I suggest
Sparkfun as a
> Fellow clock-tickers,
>
> I'm finally starting to learn microcontrollers, and have
> selected Atmel's AVR line as my tool of choice. I've also
> discovered the Arduino site, and am starting to learn their IDE as well.
>
> My first goal will be an open-source/open-hardware IRIG-B
> de
programmer for <$50). Just a shame it's killing analog skills.
Robert G8RPI.
--- On Wed, 26/5/10, jimlux wrote:
From: jimlux
Subject: Re: [time-nuts] IRIG B
To: "Discussion of precise time and frequency measurement"
Date: Wednesday, 26 May, 2010, 14:16
Bob Camp wrote:
&g
Bob Camp wrote:
Hi
Strange as it seems, *stocking* the R's and C's can be an issue. There's also placement cost. Based on some of the numbers you see, the cross over point (IC to odd value R's and C's) is amazingly low. I'm not saying any of that's right, just that it's the way a lot of companie
I have done this with an AVR microcontroller and it turned out to be very
easy. Just program one output to generate a 1 KHz carrier and another to
modulate the amplitude using a resistive divider. A simple LPF will knock
the edges off the carrier and not affect the timing accuracy too much.
Receiv
Hi
Strange as it seems, *stocking* the R's and C's can be an issue. There's also
placement cost. Based on some of the numbers you see, the cross over point (IC
to odd value R's and C's) is amazingly low. I'm not saying any of that's right,
just that it's the way a lot of companies roll up the c
> Could probably do it all with a Propeller.
That sounds like an invitation for a contest.
What would be the output to indicate success?
PPS?
Disciplined 10 MHz?
Time in ASCII, LEDs, LCD, ...?
How would you score things?
Cost?
Say list price for key parts at qty 1000
Ignore power
Could probably do it all with a Propeller.
Don
- Original Message -
From: "jimlux"
To: "Discussion of precise time and frequency measurement"
Sent: Tuesday, May 25, 2010 9:36 PM
Subject: Re: [time-nuts] IRIG B
Bob Camp wrote:
Hi
Audio codecs (especially
Magnus Danielson wrote:
On 05/26/2010 01:09 AM, Bob Camp wrote:
Hi
Like all the rest of us I'm making assumptions. I *assume* that we're
talking about an implementation that will handle IRIG over audio over
a fairly wide dynamic range.
Well, like most cases, I'd assume it is over "sufficien
Hal Murray wrote:
The IRIG-B decoder work I did was implemented on power systems relays &
disturbance recorders several years ago, then I left the company and in the
meantime, they changed over to an FPGA implementation and skipped the
processor altogether. Now I'm back with that same company (a
Bob Camp wrote:
Hi
Audio codecs (especially monophonic ones) are pretty cheap these days.
Depending on volume they can get to the sub $1 range. Even in small quantity
they are below $4. That makes them a pretty tempting "front end" for a send
/ receive box.
Bob
i would think, given that the
Hi
Most of the cheap codecs are 24 bits "as advertised" and maybe 16 bits "as
measured".
That puts them in a nice comfort zone a bit past the 10 or 12 bits you get from
a micro.
Bob
On May 25, 2010, at 7:23 PM, Magnus Danielson wrote:
> On 05/26/2010 01:09 AM, Bob Camp wrote:
>> Hi
>>
>>
On 05/26/2010 01:09 AM, Bob Camp wrote:
Hi
Like all the rest of us I'm making assumptions. I *assume* that we're talking
about an implementation that will handle IRIG over audio over a fairly wide
dynamic range.
Well, like most cases, I'd assume it is over "sufficient" dynamic range.
The si
Hi
Like all the rest of us I'm making assumptions. I *assume* that we're talking
about an implementation that will handle IRIG over audio over a fairly wide
dynamic range.
Bob
On May 25, 2010, at 6:30 PM, Magnus Danielson wrote:
> On 05/25/2010 11:12 PM, Bob Camp wrote:
>> Hi
>>
>> I *think
On 05/25/2010 11:12 PM, Bob Camp wrote:
Hi
I *think* Clive is looking for a chip set to put on a pc board in a product.
Me too, but I think the reality is that I don't think there is such a
thing except maybe in some early ASICs. Today FPGAs rule that world. The
benefit is naturally that fun
al Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Hal Murray
Sent: Tuesday, May 25, 2010 2:50 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] IRIG B
> The IRIG-B decoder work I did was implemented on power systems
measurement
Subject: Re: [time-nuts] IRIG B
16 bit audio interfaces with USB adapters (cheap sound cards) are
available made in the old country for less than ten inflated rasbuckniks
on epray...
Don
Bob Camp
> Hi
>
> Audio codecs (especially monophonic ones) are pretty cheap these days.
>
> Audio codecs (especially monophonic ones) are pretty cheap these days.
> Depending on volume they can get to the sub $1 range. Even in small quantity
> they are below $4. That makes them a pretty tempting "front end" for a send /
> receive box.
I got an interesting education in silicon econom
> For full send / receive in hardware it looks like a "grab a FPGA and codec"
> sort of thing. Might be able to do it with a micro depending on the
> performance level.
It doesn't take a lot of CPU.
I have a 433 MHz AMD Geode (i386 clone) running ntpd's IRIG decoder. Top
says the CPU usage b
> The IRIG-B decoder work I did was implemented on power systems relays &
> disturbance recorders several years ago, then I left the company and in the
> meantime, they changed over to an FPGA implementation and skipped the
> processor altogether. Now I'm back with that same company (although
> o
Of Dean Weiten
> Sent: Tuesday, May 25, 2010 9:05 AM
> To: cgr...@quartzlock.com
> Cc: time-nuts@febo.com
> Subject: Re: [time-nuts] IRIG B
>
> Date: Tue, 25 May 2010 09:08:18 +0100
> From: "Clive Green"
> Subject: [time-nuts] IRIG B
> To:
> Message-I
-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Dean Weiten
Sent: Tuesday, May 25, 2010 9:05 AM
To: cgr...@quartzlock.com
Cc: time-nuts@febo.com
Subject: Re: [time-nuts] IRIG B
Date: Tue, 25 May 2010 09:08:18 +0100
From: "Clive Green"
Subject: [time-nuts] IR
Stanley Reynolds wrote:
Example of IRIG-B generator and decoder implemented in LabVIEW FPGA:
http://zone.ni.com/devzone/cda/epd/p/id/3396
Thanks,
I was looking for something in VHDL or Verilog... I'm not sure how well
the Labview RIO, etc. stuff ports to non-Labview environments, but I'll
Example of IRIG-B generator and decoder implemented in LabVIEW FPGA:
http://zone.ni.com/devzone/cda/epd/p/id/3396
Stanley
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a
Hal Murray wrote:
Can anyone help with a modern IRIG B chipset manufacturer
Send or receive?
The ntp package has software for both sides using PC audio cards.
I've been looking for an open-source IRIG B or E reader for FPGA use.
___
time-nuts mai
Date: Tue, 25 May 2010 09:08:18 +0100
From: "Clive Green"
Subject: [time-nuts] IRIG B
To:
Message-ID: <000d01cafbe1$6f6788b0$4e369a...@com>
Content-Type: text/plain; charset="iso-8859-2"
Can anyone help with a modern IRIG B chipset manufacturer
Many thanks
Clive Green
--
Clive Green wrote:
Can anyone help with a modern IRIG B chipset manufacturer
I didn't know that there was such a thing, even in ancient times, much
less modern. All I've seen are designs made of discretes or programmed
in a microcontroller or FPGA.
Are you looking for a IRIG generator or
Hi
For full send / receive in hardware it looks like a "grab a FPGA and codec"
sort of thing. Might be able to do it with a micro depending on the performance
level.
Bob
On May 25, 2010, at 4:08 AM, Clive Green wrote:
> Can anyone help with a modern IRIG B chipset manufacturer
>
> Many than
> Can anyone help with a modern IRIG B chipset manufacturer
Send or receive?
The ntp package has software for both sides using PC audio cards.
--
These are my opinions, not necessarily my employer's. I hate spam.
___
time-nuts mailing list -- tim
Hello Clive.
I believe that Meinberg may have something. Take a look at the link below:-
http://www.pcidatabase.com/vendor_details.php?id=1623
Hope all going well.
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Clive G
e and frequency measurement
Subject: Re: [time-nuts] IRIG B(1) sample wav file
Does anybody know what is the time difference (or error) between two
PC-s set this way?
(I mean the difference between two PC internal RTCs).
Can this method be used to sinc two sound cards, contained in two PCs
some dis
21:30
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] IRIG B(1) sample wav file
Does anybody know what is the time difference (or error) between two
PC-s set this way?
(I mean the difference between two PC internal RTCs).
Can this method be used to sinc two
Sent: 31 October 2009 21:30
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] IRIG B(1) sample wav file
Does anybody know what is the time difference (or error) between two
PC-s set this way?
(I mean the difference between two PC internal RTCs).
Can this meth
Here are some specs for a hardware device:
http://www.meinberg.de/english/products/tcr511pci.htm
Stanley
Does anybody know what is the time difference (or error) between two
PC-s set this way?
(I mean the difference between two PC internal RTCs).
Can this method be used to sinc two sound
Thanks Stanley,
That worked great.
73,
Robert G8RPI.
--- On Sat, 31/10/09, Stanley Reynolds wrote:
From: Stanley Reynolds
Subject: Re: [time-nuts] IRIG B(1) sample wav file
To: "Discussion of precise time and frequency measurement"
Date: Saturday, 31 October, 2009, 19:09
Recor
Does anybody know what is the time difference (or error) between two
PC-s set this way?
(I mean the difference between two PC internal RTCs).
Can this method be used to sinc two sound cards, contained in two PCs
some distance apart.
Predrag Dukic
At 17:10 31.10.2009, you wrote:
Recorded it and tested on my reader should be ok now:
www.n4iqt.com/timecode/timecode.wav
It is day 076 hour 13 min 54.
Stanley
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Don't know if the level is right, this signal maybe clipped and I need to
attenuate it.
www.n4iqt.com/timecode/timecode.wma
also it's a wma trying to convert to a wav, will place in the same place if it
figure it out.
Stanley
- Original Message
From: Robert Atkinson
To: time-nuts@
readers (PSU
>faults) and needed to check them. I only need one so I'll put the other up
>for offers to the group before it goes to epay.
>
>Thanks,
>Robert G8RPI.
>
>--- On Sat, 31/10/09, Bruce Lane wrote:
>
>
>From: Bruce Lane
>Subject: Re: [time-nu
rom: Bruce Lane
Subject: Re: [time-nuts] IRIG B(1) sample wav file
To: time-nuts@febo.com
Date: Saturday, 31 October, 2009, 16:10
There's a nice package called NMEATime which will generate IRIG-B code
using your sound card.
http://www.visualgps.net/NMEATime/default.htm
Lots of ot
There's a nice package called NMEATime which will generate IRIG-B code
using your sound card.
http://www.visualgps.net/NMEATime/default.htm
Lots of other neat software on that site as well. I bought VisualGPS
and NMEATime many moons ago.
Happy tweaking.
***
On Thu, August 31, 2006 16:10, Rob Kimberley said:
> I wonder if anyone can help me out here.
>
> Looking for an IRIG-B Reader/Generator that can read IRIG-B and Generate
> IRIG-B + 1 day. i.e. output is always exactly 1 day ahead of input. Must
> be
> able to start at an input of 000:00:00:00 (DD
The older time code generators can take an external frequency source,
but require you to make an initial time entry. Some allowed an external
sync pulse for more precise initialization.
I have several of these beyond my needs. Let me know if you can't
find what you need. Very reasonable, a bit mor
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