[time-nuts] Very stable synthesizer, alternative to PTS(Programmed Test Sources) x10 or 040?

[Chuck Forsberg WA7KGX]

On 07/08/2013 07:55 AM, Ed Palmer wrote:
> In 2002, this document:
>
> THE CRYSTAL OSCILLATOR CHARACTERIZATION FACILITY AT THE AEROSPACE 
> CORPORATION
> http://www.pttimeeting.org/archivemeetings/2002papers/paper32.pdf
>
> stated:
>
> "The Programmed Test Sources, Inc. PTS model #250M6NIGSX-51 low-noise 
> frequency synthesizer is
> used to offset the frequency reference to obtain the desired beat 
> frequency. In our previous system, we
> used a Fluke 6160B frequency synthesizer, since the Fluke 6160B 
> frequency synthesizer had the lowest
> noise contribution of all the frequency synthesizers on the market at 
> that time.  The reason for having the
> low-noise frequency synthesizer is the synthesizer  noise 
> contributions to the system noise-floor.
> Unfortunately, Fluke has discontinued manufacturing and maintaining 
> this synthesizer. Therefore, we
> looked at the new synthesizers on the market and found that the PTS 
> synthesizer was the closest to the
> Fluke 6160B frequency synthesizer in terms of noise floor. "
>
> Sounds like a working 6160B would be a nice thing to have. 
> Unfortunately, it's too large for my already overcrowded lab. :-(
>
> Ed
>
>
> On 7/8/2013 3:44 AM, Anders Time wrote:
>> I have been looking around for a very stable synthesizer(<E-12 at 1s 
>> adev).
>> The only really good information that I have found is febo.com´s
>> measurements on the PTS 
>> synthesizers(http://www.febo.com/pages/pts_synth/).
>> Is there any other really good alternatives to the PTS synthesizers? 
>> DDS?
>> HP?
>> Best Regards
>> Anders
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I have a 6061A using an external frequency reference (Trimble Thunderbolt).
The 6061A is a fairly large and massive beast by today's standards.

Using the GPIB interface one could simulate the classic WWVB signal.
Maybe I could get my Oregon Scientific stuff to get the time right.

What is the difference between the A and B models?

-- 
      Chuck Forsberg WA7KGX   caf at omen.com   www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
   Omen Technology Inc      "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430