N2809A Datasheet, PDF (6/11 Pages) Keysight Technologies – Bandwidths up to 33 GHz

06 | Keysight | PrecisionProbe for Bandwidths up to 33 GHz - Data Sheet
PrecisionCable Correction
S21 Insertion Loss Correction
PrecisionCable can be used to remove insertion loss
caused by cables and fixtures up to 33 GHz. Previously the
only way to do this analysis was to characterize the cable
using simulation, TDR, or a VNA. All of these methods can
be accurate and can yield the desired results. You would
then take the newly created s-parameter file to the oscillo-
scope and use the de-embedding software to remove the
insertion loss of the fixture or cable. While this method
works, it requires extra equipment and effort. Precision
Cable allows for this characterization to be done inside of
the same oscilloscope that the measurements will be taken.
Characterizing the cables and fixtures takes less than five
minutes in many cases which saves significant time.
Note: This measurement does require access to both ends of the fixture or
cable, similar to methods such as VNA and TDR.
Figure 7: E.xample of frequency response correction of a cable. The
3 dB down point moved from 1 GHz to 4 GHz.
Figure 8: PrecisionProbe corrects phase non-linearities, notice the new flat phase.