[time-nuts] Synchronisizing a 100MHz TCXO with Tbold

[Peter Krengel]

Thank you all for your suggestions.

@ Attila:
 I think your suggestion would be "a little bit"
too complicated. I dont want to write a dissertation :))
My idea was to simply get a low jitter out of the 100MHz
TCXO clocking the FPGA etc..
The fine TCXO I like to use is a AXLE20-12 from AXTAL.
I think its expensive enough for my experiments (about 100,- EUR) and it 
also
got a electronic frequency control input as well as a even much
more expensive OCXO which would cost me 180,- EUR or more.
As I said as the ADCs are working in cascade they have to be
enabled and disabled as exact as possible to avoid sampling errors.
A jittering clock would do a bad job in that circuit while long time 
stability is not a problem.

@ Chuck:
A good idea in principle but I only have one tbold which
controlles all my measurement equipment like spectrum analyzer,
signal generators a.s.o. I also dont know whether a synchronisation
of the 100MHz TCXO to the tbold will really give me
a better noise figure than running the TCXO stand alone.
The TCXO I like to use gives me a low noise of -138dBc/10kHz
and as far as I know tbold comes with -142 or even better.
So the main question is whether a synchronisation will give
better results or not. If so an additional effect would be the
fact that all equipment is then working synchronous. The ADCs
I use will get a part of a homemade 1GHz DSO.

@ Bert:
Thank you for the hint. I think to use a ADF4001 is an easy task
so I like to start my experience first using your idea.

Again thank you for even more suggestions.
Regards
Peter, DG4EK