[time-nuts] How do I know my GPS stabilized oscillator is working?

[Alberto di Bene]

Brooke Clarke wrote:
> Hi Alberto:
> 
> I don't think so.  The crystal oscillator is aging and so the EFC value 
> should match the aging in the long run.  See that plots at:
> http://www.rt66.com/%7Eshera/index_fs.htm
> 
> To see of a GPSDO is working compare it's 1 PPS output to the GPS 1 PPS.
> 
> Have Fun,
> 
> Brooke Clarke
> 

Hi Brooke,

   yes, that's true, but IMHO the aging effect has a much, much longer time constant than that of the PLL governing the 
GPSDO, and so it should be possible to differentiate between the two effects... or not ?

73  Alberto  I2PHD