Isolation Step Of A 2-Port Cal - Keysight N9923A FieldFox User Manual

FULL 2-Port (QSOLT) – Mechanical Cal ONLY (Requires Option 122)
Enhanced Response Cal - Forward OR Reverse (May require an option)
NOTE Also select an Enhanced Response Optimization. Learn more on page 73.
TRL – Mechanical Cal ONLY.
1-port Response Cals (Open or Short)

Isolation Step of a 2-port Cal

The optional isolation step of a 2-port calibration corrects for crosstalk which is the
internal signal leakage between the test ports. The additional Isolation step measures
Load standards that are connected to both FieldFox test ports.
Perform an isolation calibration when you are testing a device with high insertion
loss, such as the stop band of a filter or a switch in the open position.
The isolation step can add noise to the error model when the measurement is very
close to the noise floor of the analyzer. To improve measurement accuracy, set a
narrow IF Bandwidth during the calibration.
The Isolation step is NOT allowed with ECal or QuickCal.
How to perform the additional Isolation step
With a 2-port measurement selected:
72
Sweeps in BOTH directions.
Quicker to perform than Full 2-port. Corrects all S-parameters.
DUT: Insertable only
Standards: OPEN, SHORT, LOAD on port 1. Flush THRU between ports.
Sweeps in BOTH directions.
Faster measurements than Full 2-Port.
DUT: Non-Insertable or Insertable
S-parameters Corrected: S21 and S11 (Forward) OR S12 and S22 (Reverse)
Standards: OPEN, SHORT, LOAD on ONE port. Defined THRU between ports.
Sweeps in ONE direction.
Potentially better accuracy than Full 2-port. Corrects all S-parameters.
DUT: Non-Insertable or Insertable
Standards: Thru, Reflect, Line or variations of these. A TRL Cal Kit MUST be
selected to see this Cal Type.
Sweeps in BOTH directions.
Learn more about TRL Calibration in the Supplemental Online Help:
http://na.support.keysight.com/fieldfox/help/FieldFox.htm
Calibrate the magnitude and phase of a measurement using 'modeled' mechanical
standards. Measurement accuracy is better than Simple Response Cals (available
on the main Cal page) but NOT as good as full 1-port cal. Corrects either S11 or
S22. Can be used with Isolation (see following section). Learn more about Simple
Response Cals on page 69.
DUT: Non-Insertable or Insertable
Standards: OPEN or SHORT on ONE port.
Sweeps in BOTH directions.
FieldFox User's Guide