Mechanical Cal - Keysight N9923A FieldFox User Manual

 Press
Connect THRU (Not used for 1-port cals)
 Connect port 1 to port 2, either by mating the connectors that attach to the DUT
 Press Finish.
CAL ON Q
corrected with QuickCal.
Using QuickCal with a Long Jumper Cable
QuickCal requires a sufficient frequency span to adequately characterize the jumper
cable (the cable between the instrument port and the DUT). If a 'Cal Failed' error
appears and you connected the optional Load standard, then increase the frequency
span of the measurement until the error no longer appears. After the calibration, you
can then decrease the frequency span as needed and rely on interpolation. Learn
more about Interpolation on page 75.
QuickCal is also limited in how much jumper cable loss it can tolerate. If QuickCal
without the load is failing, then measure the load during the QuickCal to see if that
resolves the issue.

Mechanical Cal

Mechanical Calibration is performed using discrete standards from a Cal Kit. Several
Cal Kit definitions are built into the FieldFox.
NOTE Visit
Kits. Also at this website, download DataLink software that allows you to edit Cal Kit
definitions or add a new Cal Kit.
Mechanical Cals are extremely accurate when performed using the correct Cal Kits
with standards that are clean and in good repair, and when using correct connection
procedures.
How to perform a Mechanical Cal
 Disconnect the DUT from the FieldFox.
 If a jumper cable or adapter is required to connect the DUT to the FieldFox, then
 In NA, CAT, or VVM Mode, press Cal 5.
 Then
66
When a jumper cable has too much loss. If a 'Cal Failed' error appears and you
o
skipped the Load measurement, then perform the Cal again but measuring the
Load.
When your DUT has high return loss such as the reject band of a filter. Then
o
measuring the load improves accuracy. Even with the optional Load, phase
accuracy begins to degrade when the return loss is greater than about 20dB.
in all other cases and when making DTF measurements.
Skip Step
Measuring a load would do little to improve accuracy.
(Flush THRU), or by using a short jumper cable. Learn more about Flush THRU on
page 70. Then press Measure.
is shown on the screen for all displayed measurements that are
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connect those components to the FieldFox connectors. The effects of those
components will be measured and removed during the calibration, and only the
effects of the DUT will be displayed in the measurement results. These should be
high-quality components!
Mechanical Cal
to see a complete list of supported Cal
FieldFox User's Guide