[AMPS] Re: Circuit for measuring RF voltage...

[measures]

>
>Rich said:
>
>>I use a BNC "T" with stiff wires soldered to the pins on one side.  This
>>allows me to clip on a 100 to one oscilloscope probe,  allowing me to
>>measure V across 50-ohms.
>
>
>I haven't seen an analogue 'scope guaranteed to an accuracy of better than 
>+/-5%
>of full screen.  That means a possible power error of around +/-10%, 
>excluding
>probe errors. Digital ones can get to 1%, although you have to watch analogue
>bandwidth ratings, and aliasing problems if you're not running single 
>tone. Add
>the probe error too. Any of these methods requires calibration against a 
>known
>power source at the frequency of operation.
>
I use a 10v standard to calibrate.   

-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


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