Fw: Re: Fw: Re: [Test-Equipment] Spectrum Analyzer BW measurement

[WolfBob]

Interesting pricing..the used ones are about twice the price of a new 
one...read the HP app notes first, they are free.

WBob

John Miles wrote:

> If there were any justice in the world, this book
> (http://www.amazon.com/exec/obidos/isbn=1884932169) would be featured on
> Oprah.  Robert Witte is an HP engineer from their analyzer group, and he's
> great at explaining topics like this.  Highly recommended.
> 
> -- john KE5FX
> 
> 
> 
>>	For most spectrum analyzers what you are saying is roughly true.
>>What is typically measured is the low pass filtered output of an
>>envelope  (or sometimes quasi RMS) detector looking at the output of a
>>log IF amplifier.   Some very modern instruments sample the IF signal
>>and use DSP processing and can measure true RMS in some situations,
>>however.
>>
> 
> 
> 
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