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Recommendations on low phase noise synthesizer - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


 Post subject: Recommendations on low phase noise synthesizer
Posted: Mon Dec 28, 2009 8:58 pm 
 
Captain
User avatar

Joined: Mon Dec 28, 2009 8:27 pm
Posts: 5
I'm looking around for recommendations on a basic CW functionality, extremely low phase noise synthesizer.

The Holzworth HS1001C is almost a perfect fit but alternative recommendations are what I'm looking to the RF Cafe brain trust for. :study:
http://www.holzworth.com/synthesizers.htm

The Holzworth fits the ticket due to it's outstanding phase noise, compact nature and software driven interface.
-120dBc/Hz @ 1G @10k offset or better is what I'm looking for.
Frequency ranges 10M -1G

So.... any recommendations?

-Norm Kirchner
RF Systems Engineer
National Instruments


 
   
 
 Post subject: Re: Recommendations on low phase noise synthesizer
Posted: Thu Dec 31, 2009 2:26 pm 
 
Lieutenant

Joined: Thu Dec 31, 2009 2:23 pm
Posts: 1
How about the Agilent E8663D-UNX.
-130 dBc/Hz @ 1 GHz, 10 KHz offset


 
   
 
 Post subject: Re: Recommendations on low phase noise synthesizer
Posted: Thu Jan 07, 2010 11:30 am 
 
Captain
User avatar

Joined: Mon Dec 28, 2009 8:27 pm
Posts: 5
d_erickson wrote:
How about the Agilent E8663D-UNX.
-130 dBc/Hz @ 1 GHz, 10 KHz offset


I would call that the definition of overkill to the extreme.

Any other takers?


 
   
 
 Post subject: Re: Recommendations on low phase noise synthesizer
Posted: Tue Jan 12, 2010 7:54 pm 
 
Lieutenant

Joined: Tue Jan 12, 2010 7:47 pm
Posts: 2
This has a phase noise of better than 0.4 degrees integrated from 100Hz to 1MHz. A very rough rule of thumb says that you can use that for a phase modulation with greater than 10 times that angle (4 degrees). Its very cheap: $250.
http://www.windfreak.net/Tech.htm


 
   
 
 Post subject: Re: Recommendations on low phase noise synthesizer
Posted: Tue Jan 12, 2010 8:16 pm 
 
Captain
User avatar

Joined: Mon Dec 28, 2009 8:27 pm
Posts: 5
Windfreak,

Thanks for the thought, but that device doesn't hit either the frequency range or the phase noise requirements we're looking for.
The VCO on that part has a 10k SSB phase noise of -89dBC at 2.2GHz that's worlds and worlds away from the -120 I'm on the hunt for.

To clarify what I'm trying to do a little I'll give some more detail.

Currently our PXI-5663 has pretty good phase noise performance by taking advantage of the PXI-5652. The 5663 is actually 3 different PXI modules cabled together (LO PXI-5662, Downconverter PXI-5601, IF Digitizer PXI-5622).

Because of it's modular nature, we can substitute our LO with a different LO with even better phase noise performance when the measurements call for it. Just one of those 'Damn, that's sweet!' kind of capabilities you get with a Modular Instrument approach to RF test.




Posted  11/12/2012
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