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PNA-X GCA Pulsed Application

Question asked by ecrean on Dec 8, 2009
Latest reply on Dec 8, 2009 by Dr_joel
We are having some difficulty correlating GCA measurements with Power Meter P1dB measurements.  The GCA measurement is 1 dB lower.  We are pulsing our
PA, and using external trigger channel point trigger.   Reading the GCA literature, it indicated : "Another benefit of GCA is that it optimizes accuracy
and speed by varying the IF bandwidth. It applies wider bandwidths to higher power levels, which tend to have less  noise, and narrower bandwidths to lower power levels,
which tend to be noisier"

For our 5 usec pulse, we need an IF bandwidth of 280 to 360 KHz to pass the pulse without any drop-off.  COuld the varying use of IF bandwidth by the GCA add error in our
measurement?

Ed  

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