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Pulse Measurements with PNA and Unknown Thru Algorithm

Question asked by loren.betts Employee on Dec 8, 2005
Latest reply on Mar 10, 2006 by loren.betts
The latest versions of the PNA FW default to using the unknown thru algorithm during calibration using ECal and some mechanical calibrations.  When using the PNA in narrowband(spectral nulling) pulsed mode(option H08) and using IF gating, all the receivers must be gated or the error terms will not be correct after the calibration has completed.  The easiest way to do this is to connect the R1 and R2 IF gates to the same pulse generator output and the A and B IF gates to either separate outputs(recommended) or one output(reduces flexibility).  The error terms will then be valid after the calibration is complete.

This is also the case when performing a TRL calibration.