Hi
none of these nist references will download to me in Australia,
is it some sort of national security issue?
cheers,
Neville Michie
On 21/12/2009, at 11:01 PM, Hal Murray wrote:
t...@leapsecond.com said:
Your ears are correct; the 100 Hz code began in 1960. See:
Neville Michie wrote:
Hi
none of these nist references will download to me in Australia,
is it some sort of national security issue?
cheers,
Neville Michie
They download fine across the ditch.
Probably a problem with your ISP.
Bruce
On 21/12/2009, at 11:01 PM, Hal Murray wrote:
Download OK in UK.
Rob Kimberley
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Neville Michie
Sent: 22 December 2009 09:14
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Synchronizing to WWV
Hi
Hi Neville
They work OK to Tasmania so we must have the required clearance, hi
Rex VK7MO
Hi
none of these nist references will download to me in Australia,
is it some sort of national security issue?
cheers,
Neville Michie
___
time-nuts mailing
rvas...@rob-vassar.com said:
The problem with the working configuration was that the DSP code
consumed virtually all the old SuperSPARC-II CPU's capacity. In
Intel x86 terms, these were roughly equivalent to a pre-MMX Pentium
90, so a modern system should fare much better.
ntpd on a 1GHz
paulsw...@gmail.com said:
Boy I think wwv has been doing that for 30 years+. I remember trying
to decode it with discreet chips ages ago. It was a mess due to
propagation and noise. I have seen programs that will indeed decode it
using the sound blaster you have to luv the SB cards.
It
t...@leapsecond.com said:
Your ears are correct; the 100 Hz code began in 1960. See:
http://tf.boulder.nist.gov/general/pdf/1670.pdf
http://tf.boulder.nist.gov/general/pdf/1681.pdf
http://tf.nist.gov/stations/wwvhistory.htm
http://tf.boulder.nist.gov/general/pdf/1731.pdf
Fun reading.
On Dec 21, 2009, at 3:55 AM, Hal Murray wrote:
It doesn't take anything fancy. ntpd has a couple of drivers that
use the
standard audio stuff on a PC. 8K samples per second, alaw.
The IRIG driver works pretty well. I haven't tried the one for WWV.
I had WWV audio driver working in
jus...@fuzzythinking.com said:
I think the Heathkit clock was more sophisticated. It read the 100hz
data code and automatically set the hour, minute, seconds, and date.
...
When did WWV start sending the data on 100 Hz?
I was playing with a WWV simulator the other day, and was surprised to
When did WWV start sending the data on 100 Hz?
I was playing with a WWV simulator the other day, and was surprised to hear
it.
I remember listening to WWV when I was a kid. That was back in the '50s. I
don't remember hearing the 100 Hz blips. Of course, I could have been using
gear that
Boy I think wwv has been doing that for 30 years+. I remember trying to
decode it with discreet chips ages ago.
It was a mess due to propagation and noise. I have seen programs that will
indeed decode it using the sound blaster you have to luv the SB cards.
On Sun, Dec 20, 2009 at 7:34 AM, Tom
I agree. I have several Z3801A units for GPS timing and a rubidium
standard, but I still like to use a simple scope triggered from the 1PPS
output of a test oscillator to monitor the ticks from CHU on 7.850 MHz. I
also use a circular sweep oscilloscope sweeping at 100 Hz, derived from a
Hi Don,
I think the Heathkit clock was more sophisticated. It read the 100hz data
code and automatically set the hour, minute, seconds, and date. It did all
of this using an on-board microprocessor. I've never owned one, so I'm
basing my information on the blurb here:
Is this the basis document for the Heathkit Most Accurate Clock???
Don
- Original Message -
From: Justin Pinnix jus...@fuzzythinking.com
To: Discussion of precise time and frequency measurement
time-nuts@febo.com
Sent: Friday, December 18, 2009 9:40 PM
Subject: [time-nuts]
We'll, if you need millisecond accuracy its OK. But if you running real
clocks - rubidium or cesium, WWV is just not good enough.
If you look around, you can pick up a OEM GPS receiver board for under
$40. You can also find cheap patch antennas for $9/10 - at TAPR. Put
the receiver in a
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