[time-nuts] State of the art of crystal oscillator measurements

KA2WEU at aol.com KA2WEU at aol.com
Thu Aug 11 07:03:03 EDT 2016

Good morning,
the difference between the two phase noise FWSP systems is the lower noise  
internal 10 MHz reference crystal  oscillator (optimized )  as  well as 
also some of the internal FSWP circuits custom  optimized . The  output power 
was 17 dBm, but we also have build one oscillator with  12 dBm  output power 
and noise  similar values.
This is part of a PhD project which I supervise .    For values so close to 
the carrier you need a very low noise power supply  and a well shielded 
Faraday cage . The measurement with ca 100  correlation  took about 2 hours. 
Also the heating circuit needs to be low noise and well  decoupled .
The 100 Hz value of the better analyzer seems suspicious , It needs to be  
further  investigated.
All very exciting and time consuming .
In a message dated 8/10/2016 11:02:25 P.M. Eastern Daylight Time,  
mfeher at eozinc.com writes:

These  seem extremely fantastic results for a 100 MHz oscillator. I am 
curious what  the Po of the oscillators are Regards - Mike 

Mike B. Feher, EOZ  Inc.
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960  office
908-902-3831 cell

-----Original Message-----
From:  time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Tom Van  
Sent: Wednesday, August 10, 2016 9:19 PM
To: Discussion of precise  time and frequency measurement
Cc: enrico.rubiola at gmail.com
Subject: Re:  [time-nuts] State of the art of crystal oscillator  

Attached is a GIF of the table Ulrich wants to  share.

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