digital spectrum analyzer

How can we bring high frequency for example 200MHZ to pc ?
So whit FFT software we can have a spectrum analyzer.
Does any port support such this high frequency? If no , what
characteristics does converter devise should have?
Any practical idea?

thanks

 

Hi,

Gage used to make plug-in a-to-d boards for this purpose. It looks like
they are now owned by Tek. See
http://www.gage-applied.com/

Bob

 

Tek sold them back to themselves a couple days ago.

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Use a downconvertor to convert to a frequency the PC can read.