Keysight Technologies InfiniiMax III Series User Manual page 126

6. Performance Plots
N5445A 30 GHz Browser Head, 3 mm span (with N2803A)
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N O T E For browser spans of 2 and 3mm, the biggest effect is in the frequency and time
responses. The input loading is nearly the same as for the 1mm span except that the
impedance minimum at ~22 GHz is slightly higher.