[time-nuts] connor winfield GPSDO module phase noise

SAIDJACK at aol.com SAIDJACK at aol.com
Sat Feb 22 21:06:35 EST 2014


Jim,
 
not sure if I had sent these before, or if you found them in the archives,  
here are my ADEV, phase noise, and frequency stability measurements results 
of  the FTS-250.
 
All I did was remove the GPS antenna for about 10 seconds during the  test 
to show the effect of the missing antenna.
 
As you can see the phase noise is full of spurs, the unit jumped a whooping 
 120ppb off-frequency, and the phase took some minutes to stabilize again.
 
I am sending two email attachments so they don't get stuck in the Febo  
server due to file-size.
 
bye,
Said
 
In a message dated 2/22/2014 05:34:16 Pacific Standard Time,  
jimlux at earthlink.net writes:
 
I ran  across these  units
http://www.conwin.com/time-frequency_references-gps_disciplined-gps_referenc
es.html

and  I found some references from a few years ago in the time-nuts 
archives,  but I can't find any data on phase noise, etc. for the 
disciplined  output.

The data sheet/user manual/etc just say "NCO", but there's no  specs on 
the performance.

Has anyone measured one of  these?

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