Keysight N9923A, User Manual, Page: 118 / 276

118 Keysight N9923-90001 User’s Guide
Calibration for NA, CAT, and VVM Modes
Waveguide Cal Kits
Keysight sells two waveguide Cal Kit series: the premium 11644A series and
the economy N9911X series. Both are available online at
www.Keysight.com
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
Settings
(Learn how to use the Quick Settings table in
“Quick
Settings” on page 45
.)
— Set
Media = Waveguide
. Frequency Mode =
BandPass
is automatically
selected for you.
— Scroll down to
Waveguide Definitions
. Select the
Waveguide Standard
being used. If your waveguide standard is NOT listed:
—Select
User Waveguide
. Then press
Done
.
—Then
DTF Cable Specifications
, then
Edit/Save/Recall Cables,
then
Edit Cable
.
—Scroll to set
Waveguide Definition
. The default setting is
VF Corr
=
Auto.
—Set the
Min
,
Max
, and
Cutoff Frequencies
.
—
Cable Correction = Auto
is the default setting. The Effective Velocity Factor
is calculated automatically based on the frequencies of the waveguide
standard. To override this setting, set Cable Corr =
Man
.
NA Mode - How to make Waveguide settings
These settings are necessary ONLY when your measurement requires electrical
delay or port extensions, or if using Time Domain Transform.
— Press
Meas Setup 4
— Then
Transform
— Then Transform Settings