On Fri, Apr 08, 2016 at 06:13:07PM -0400, Bob Camp wrote:
> Hi
> If you start from a 24 MHz TCXO (different modules use
> different TCXO’s):
> On an 8 MHz output, most of the time you divide by three.
> On a 10 MHz output, you need to divide by 2.4.
> The net result is that you divide by 2 som
"Could you elaborate on this a little if time permits? I'm more a
'digital person' but it sounds interesting. Thanks in advance, Herbert "
Yes Herbert
here is;
first divide 24MHz by two you get a very good quality absolute 50% duty
cycle 12MHz, than you feed that 12MHx into mixer [which could b
It works the same on PC hardware
The PPS causes an interrupt and the handler captures the value of a counter
that is driven by the system clock. It is typically a nanosecond level
clock that just free runs. It saves the captured value were a user level
process can read it. The user level proces
The instructable I wrote about it is at
http://www.instructables.com/id/Science-fair-How-accurate-is-the-AC-line-frequency/
There’s code for the Arduino and the Linux side as well as schematics.
> On Apr 8, 2016, at 10:32 AM, Ben Hall wrote:
>
> On 4/6/2016 11:34 PM, Nick Sayer via time-nuts w
Hi
If you start from a 24 MHz TCXO (different modules use different TCXO’s):
On an 8 MHz output, most of the time you divide by three.
On a 10 MHz output, you need to divide by 2.4. The net result is that you
divide by 2 sometimes and 3 other times.
In the 10 MHz case, there is a *lot* of en
It's NASA property and not likely to be excessed. You'll wait in vain
Sent via the Samsung Galaxy S®6 active, an AT&T 4G LTE smartphone
Original message From: Tom Knox Date: 4/8/2016
11:34 AM (GMT-08:00) To: Discussion of precise time and frequency measurement
Subje
Not that any of us are in the affected area, but it's an interesting notice
nonetheless.
No replies necessary.
/tvb
___
All CGSIC:
On 7 April 2016 the U.S. Department of State released the following notice.
START NOTICE
Korean Peninsula GPS Jamming
Actually they are really nice, especially if it has the external 5MHz reference
input.
For many aspects of Time and Freq related work I do close in Phase Noise is a
primary concern.
If you ever decide it is not needed let me know I and I am sure many other
"Time Nuts" would be interested.
Cheers
On 4/6/2016 11:34 PM, Nick Sayer via time-nuts wrote:
fed into a Raspberry Pi serial port that was running a simple daemon
that logged every line it got to syslog. Syslog is handy because it
timestamps everything for you and keeps rotating log files and the
like.
Would you be so kind as to elab
I just ran across an unused FTS1050A at work, and before spending any
significant time seeing if it still works (like finding a power source..
there's no AC inlet, so I think it runs off DC), I decided to look up
the data sheet performance. Interestingly, it seems it's not that
wonderful, comp
> The runs I did used a number of modules, not just uBlox products. Some modules
> did worse than others on position. I dropped them out of the group before I
> moved
> on to timing.
Hi Bob,
I had access to a pre-release ublox combined GNSS receiver a few years ago and
found the same thing. My
On Mon, Apr 04, 2016 at 06:07:54PM -0700, Alexander Pummer wrote:
> and it is relative easy to make 10MHz from 8MHz with analog
> frequency manipulation, which generates less jitter
Could you elaborate on this a little if time permits?
I'm more a 'digital person' but it sounds interesting.
Thank
Hi
In my case, the antennas were nice brand new NovaTel L/L2/L5 Glonass rated
survey antennas. The were up far enough to have a 360 degree view of the sky
down to 10 degrees of the horizon.
The runs I did used a number of modules, not just uBlox products. Some modules
did worse than others on p
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