Waveguide Calibrations - Keysight B Series User Manual

Calibration for NA, CAT, and VVM Modes
— Configure and perform the calibration as usual. At the first step of the Cal
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:
http://na.support.keysight.com/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
— Press Meas Setup 4
— Then
— Set Media = Waveguide. Frequency Mode = BandPass is automatically
— Scroll down to Waveguide Definitions. Select the Waveguide Standard
Keysight N9938-90003 User's Guide
you will be prompted to connect a Load standard to one or both test ports.
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)
40.)
www.Keysight.com
to select a DTF measurement.
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