[time-nuts] Best phase detector / mixer for 100MHz?

Bruce Griffiths bruce.griffiths at xtra.co.nz
Tue Nov 27 10:33:12 UTC 2012


Adrian wrote:
> Bruce Griffiths schrieb:
>> Demian Martin wrote:
>>> I asked Wenzel about mixers for phase noise measurement and they 
>>> directed me
>>> to Marki Microwave as what they use:
>>> http://www.markimicrowave.com/2770/Mixers.aspx  I have not obtained or
>>> tested any myself but it's a pretty solid recommendation I think.
>>>
>>> I got this guy to add cross correlation to his FFT software suite:
>>> http://www.hpw-works.com/  however I have not built hardware to try 
>>> it. He
>>> has a 30 day trial and its not expensive for what it is, $300.
>> There's no evidence of a cross power spectrum function in this suite.
>> One needs to be able to average at least 10,000 cross power spectra 
>> for some applications.
>>
>> Bruce
> Here is one that does cross spectrum and more: http://www.sigview.com/
> A while ago I tried it with a Xonar Essence XT sound card and the 
> results looked quite promising.
>
> Then I got a 3562A to get to 100 kHz (don't follow me there! These can 
> be challenging to fix if not impossible. PAL's and other unobtainable 
> 'field programmables' appear to die faster than anything else in that 
> boxes. Finally, I needed three of them to get one working unit...)
>
> Adrian
>
Tried that as well, how does one get a log y scale on the cross spectrum 
plot?

Bruce



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