Waveguide Calibrations - Keysight N9923A FieldFox User Manual

 Press Cal 5 then
 Then
 Then
 Then <Back
 Configure and perform the calibration as usual. At the first step of the Cal you will
NOTE If the first calibration step does NOT prompt you to connect Load standards to each
port, 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:
http://na.support.keysight.com/fieldfox/help/DataLinkHelp/DataLink.htm
 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.
 Press Measure 1 then select a DTF measurement.
 Press Meas Setup 4
 Then
 Set Media = Waveguide. Frequency Mode = BandPass is automatically selected for
 Scroll down to Waveguide Definitions. Select the Waveguide Standard being
Calibration for NA, CAT, and VVM Modes
Mechanical Cal / ECal
Advanced
Omit Isolation
Perform the Isolation step
OFF
o
(default) Omits the Isolation step
ON
o
be prompted to connect a Load standard to each test port.
(Learn how to use the Quick Settings table on page 25.)
Settings
you.
used. If your waveguide standard is NOT listed:
Select User Waveguide. Then press Done.
o
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