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Calibration for NA, CAT, and VVM ModesFUTURE
If the first calibration step does NOT prompt you to connect Load
standards, then the Cal Kit probably does not contain an Isolation
standard. You can use DataLink software to edit the Cal Kit and add an
isolation standard using a Load standard. See Data Link Help for more
information:
https://www.keysight.com/us/en/lib/resources/service-manuals/keysight
-fieldfox-library-help-and-manuals-2153870.html
— This setting survives an Instrument Preset.
Waveguide Calibrations
In general, calibrating with Waveguide is very similar to calibrating with coax.
However, most coax mechanical Cal Kits have standards that can be used over
a very wide frequency range. Waveguide Cal Kits are used over a narrow
frequency range. Therefore, it is VERY IMPORTANT to set the frequency range
of the measurement WITHIN the frequency range of the waveguide Cal Kit.
Otherwise, an error message will appear during the 'Calculating Steps' portion
of the calibration.
Waveguide Cal Kits
Keysight sells two waveguide Cal Kit series: the premium 11644A series and
the economy N9911X series. Both are available online at
Effective Velocity Factor
Velocity factor is the speed at which an electromagnetic signal passes through
the transmission medium relative to the speed of light. This value is important
when distance is being calculated in DTF measurements (CAT mode) and Time
Domain (NA mode).
When the media is waveguide, the velocity factor changes with frequency.
FieldFox calculates this 'effective' velocity factor automatically. However, the
settings are different for CAT mode and NA mode.
CAT Mode - How to make Waveguide settings
These settings are necessary ONLY when making DTF measurements.
1. Press Measure 1 then
2. Press Meas Setup 4
3. Then
4. Set Media = Waveguide. Frequency Mode = BandPass is automatically
5. Scroll down to Waveguide Definitions. Select the Waveguide Standard
140
Settings
(Learn how to use the Quick Settings table in
and change Quick Settings" on page
selected for you.
being used. If your waveguide standard is NOT listed:
Distance to Fault (dB)
52.)
Keysight N9915-90020 User's Guide
www.Keysight.com
to select a DTF measurement.
"How to view
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