Calibration For Na, Cat, And Vvm Modes; All About Calibration; Why And When To Calibrate - Keysight N9923A FieldFox User Manual

Calibration for NA, CAT, and VVM Modes

Calibration removes the systematic errors that are associated with measurements in
NA, CAT, and VVM Modes. Key presses are identical in all of these Modes.
In this Chapter
Why and When to Calibrate ................................. 62
Definitions ............................................................. 62
CalReady ............................................................... 63
How to Perform a Calibration ............................... 63
QuickCal ................................................................ 64
Mechanical Cal ..................................................... 66
ECal ....................................................................... 68
Simple Response Cal ............................................ 69
View Cal ................................................................ 70
Calibration Type .................................................... 70
Isolation Step of a 2-port Cal ............................... 72
Waveguide Calibrations........................................ 73
Enhanced Response Optimization........................ 73
Interpolation ......................................................... 73
Questionable Accuracy ......................................... 75
Compatible Mode Calibrations ............................. 75
Save a Calibration ................................................. 75
CalReady Properties ............................................. 75
Verify Calibration .................................................. 76
Calibration Method Summary .............................. 77
See Also
Learn How to Make 75 ohm Measurements at the FieldFox Supplemental Online
Help:

Why and When to Calibrate

There are well-defined and understood systematic errors that are measured and
calculated during the calibration process. These errors are caused by leakage signals
inside the FieldFox, by the frequency response of the FieldFox receivers, and by
reflections inside the FieldFox that interact with the DUT. After calibration, these
errors are removed from subsequent measurements.
To maintain highest measurement accuracy, perform a new calibration when any of
the following changes occur:
 When any of the following measurement settings change: Frequency Range,
 When the FieldFox temperature changes more than about 10°F (5°C). Learn how
 When the connection to the DUT changes, requiring a different jumper cable or
62
http://na.support.keysight.com/fieldfox/help/FieldFox.htm
Power Level, IF BW, and Resolution. Therefore, make these measurement settings
before calibrating. Increased Averaging, lower IF BW, and higher Resolution all
cause slower sweeps and slower calibration times. Learn about Interpolation and
Questionable Accuracy on page 73.
to monitor the internal temperature on page 14.
adapter.
FieldFox User's Guide