[time-nuts] 12.8 MHz OCXO

[Jim Lux]

On 11/24/12 8:28 AM, Alan Melia wrote:
> Joe the reason why its not so uncommon may not be obvious in the US :-))
> 12.8MHz is used as a reference for commercial and amateur PLLs in Europe
> where the common channel spacing is 12.5kHz (/1024) or 6.25kHz (/2048).
> This may mean that 12.8MHz oscillators may be more easily found in
> Europe ?? A TCXO should be capable of 0.1ppm. I have seem a lot in
> mobile/cellular product from a UK firm called Golledge but I dont know
> what the specs were.
>

since it's for a low cost one-off project, what about a inexpensive 1ppm 
TCXO with some form of temperature stabilization (something as simple as 
a appropriate coefficient thermistor/resistor combination might hold 
temperature within a degree, while room temp fluctuates 10 degrees).


Or do you need it to be stable over wild, rapid swings in temperature 
(e.g. it's outdoors or something).


Or do you need good phase noise too (the run of the mill OCXO is quieter 
than the run of the mill TCXO)