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Marker Count Accuracy test failing

Question asked by Tisfurs on Sep 20, 2011
Latest reply on Feb 3, 2016 by dhamilton
Ok, I am calibrating an 8593E spectrum analyzer, with option 140.  It is failing the Marker Count portion of its performance tests at 1.5GHz only with 20MHz and 1MHz spans.  I have already verified the accuracy of the 10MHz reference and the 300MHz cal output.  I have also already performed the Sampler Match adjustment.  Any ideas how to fix this problem?