N2808A Datasheet, PDF (6/13 Pages) Keysight Technologies – PrecisionProbe for the 9000 Series

06 | Keysight | N2808A PrecisionProbe for the 9000 Series - Data Sheet
PrecisionProbe Correction (Probes)
S21 insertion loss correction
PrecisionCable can be used to remove insertion loss caused by
cables or fixtures. 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
oscilloscope 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. PrecisionCable 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 8. PrecisionProbe corrects phase non-linearities, notice the new
flat phase.
Figure 7. Example of frequency response correction of a cable. The 3 dB down point moved from 2.5 GHz to 4 GHz.