[time-nuts] Need to measure frequencies of two sources simultaneously

Attila Kinali attila at kinali.ch
Wed Oct 23 05:18:29 EDT 2013


On Tue, 22 Oct 2013 22:39:46 -0700
Hal Murray <hmurray at megapathdsl.net> wrote:

> 
> richard at karlquist.com said:
> > Can anyone on the list point me to a true two channel counter that would
> > just measure the two sources?  We are working around 200 MHz, but could
> > possibly prescale. 
> 
> What level of accuracy do you need?
> 
> Could you feed both clocks and possibly a 3rd reference clock into a FPGA?

That's the way the TimePod works.

There are quite a few of papers around on how that works
(sorry, cannot look them up at the moment, as i'm on a busines trip)

			Attila Kinali
-- 
It is upon moral qualities that a society is ultimately founded. All 
the prosperity and technological sophistication in the world is of no 
use without that foundation.
                 -- Miss Matheson, The Diamond Age, Neil Stephenson



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