Maybe I am missing something obvious here but after using the 1PPS/10MHz
reference multiplied up to 100 MHz cant you just insert a passive L/C
phase shift network at the input (or output) of the multiplier chain and
tune one of the "C" legs in the phase shift network to align the edges
On Fri, 29 Jun 2018 16:37:41 +0200
Attila Kinali wrote:
> How about just using an FPGA then? If you clock it at 200-400MHz,
> then you can built a digital phase stepper with 2.5-5ns step size.
> The FPGA can also handle the synchronization to an external pulse
> quite easily and do fault
On Fri, 29 Jun 2018 14:13:10 +0100
"Martyn Smith" wrote:
> I'm not trying to achieve 1-5 ns to UTC as that's not possible as already
> pointed out, just 1 to 5 ns to a reference 1 pps (from Hydrogen Maser).
How about just using an FPGA then? If you clock it at 200-400MHz,
then you can built a
To: time-n...@febo.com
Subject: [time-nuts] 1 pps sync'ing
Hello,
My colleague Steve asked a question about wanting to generate a 10 MHz and
100 MHz squarewaves with both rising edges aligned to a reference 1 pps input
(to within 5ns).
We already have a product that can do this (at 10 MHz
On Fri, June 29, 2018 8:13 am, Martyn Smith wrote:
> My colleague Steve asked a question about wanting to
> generate a 10 MHz and 100 MHz squarewaves with
> both rising edges aligned to a reference 1 pps
> input (to within 5ns).
You say "both," but which edge you pick is a little bit arbitrary
Hello,
My colleague Steve asked a question about wanting to generate a 10 MHz and
100 MHz squarewaves with both rising edges aligned to a reference 1 pps
input (to within 5ns).
We already have a product that can do this (at 10 MHz), but it is very
complicated, and Steve's job is to fine an
On Mon, 25 Jun 2018 10:46:54 -0400
Bob kb8tq wrote:
> Does UTC exist ( real time ) at the 1 ns level?
Currently, it does not. The clock comparison uncertainties are
still in the order of 1-3ns for short distances (several 100km)
and grow quite a bit once you go over something like 2000-3000km.
ing. It
> sounds like an interesting application. Relative timing at the 1 ns level is
> easy. Absolute UTC timing at the ns level is much, much harder.
Does UTC exist ( real time ) at the 1 ns level?
Bob
>
> /tvb
>
> - Original Message -
> From: &q
quot;Martyn Smith"
To:
Sent: Sunday, June 24, 2018 3:37 AM
Subject: [time-nuts] 1 pps Sync'ing
> Hello,
>
> I am a newbie question.
>
> I have an application where I have a 10 MHz and 100 MHz squarewave output
> from my GPS frequency standard.
>
> The frequency
Hi
You can indeed do this, the question is - do you *really* want to?
Depending a bit on your GPS module, the 1 pps output can jump around a few
nanoseconds
on a second to second basis. Keeping the 100 MH edge locked implies modulating
the 100 MHz
by at least a few ppb at some rate faster
10 matches
Mail list logo
