[time-nuts] Ublox M8N - have I a XO or TCXO ?

EB4APL eb4apl at gmail.com
Thu Dec 22 08:58:34 EST 2016

TCXO is not an OCXO, they don't have an oven. They compensate the 
temperature induced drift using a temperature sensor, a microcontroller  
and a table or parameter set for adjusting the output frequency. BTW, 
for some applications they are unsuitable as they adjust the frequency 
in steps.


Ignacio EB4APL

El 21/12/2016 a las 20:29, Mike Millen escribió:
> >>>> Can anyone comment on the following data, and whether they think the
>>>>> oscillator in "my" M8N is a XO or a TCXO ?
> Can you monitor the current draw from cold (ambient)?
> You may be able to identify the initial steady current drawn by the TCXO
> heater, then the cycling once it's hit the right temp?
> If there's no change at all in average current as it warms then it may
> not have a TCXO.
> Mike

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