Figure 7. Example of frequency response
correction of a cable. The 3dB down point
moved from 21 GHz to 62 GHz.
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.
6
KEYSIGHT [ Keysight Technologies ]
