User`s guide

Chapter 4 149
Calibration
Simplified calibration
4. Calibration
NOTE For the simplified full 3-port calibration, (Optional) is displayed on the softkey of the type
of thru measurement that can be omitted. For example, when the omittable thru
measurement is 2-3,
2-3 (Optional) is displayed. The display after the execution of the
omittable thru measurement is the same as that for a required thru measurement.
NOTE For the simplified full 4-port calibration, (Recommended) is displayed on the softkey of
the type of thru measurement that can be omitted. For example, when the omittable thru
measurement is 2-3,
2-3 (Recommended) is displayed.The display after the execution of
the omittable thru measurement is the same as that for a required thru measurement, and
the display for the remaining omittable thru measurement is
2-3 (Optional).
For the simplified full 4-port calibration, up to three thru measurements can be omitted, but
it is recommended to perform two or more types of calibration because omitting all of them
results in poor accuracy.
Simplified 3/4-port TRL calibration
In the simplified 3/4-port TRL calibration, because the calibration coefficients are
calculated while omitting part of the thru/line measurement data and line/match
measurement data, the effect of errors when acquiring calibration data becomes larger than
in the normal 3/4-port TRL calibration. Therefore, you must give more attention to data
measurement for the simplified full 3/4-port calibration than for the ordinary 3/4-port TRL
calibration. For details, refer to “Simplified full 3/4-port calibration” on page 148.
The types of thru/line measurement and line/match measurement you can omit are
determined by the ports you select. Some types of measurement cannot be omitted.You
cannot omit thru/line measurement only or line/match measurement only, even for an
omittable measurement path.
The table below shows omittalbe measurements.
NOTE For the simplified 3-port TRL calibration, (Optional) is displayed on the softkey of the
omittable thru/line measurement. For example, when the omittable thru/line measurement
Table 4-3 Types of thru measurement that can be omitted for simplified full 4-port
calibration
Required thru measurements Types of thru measurement that can be
omitted
1-2, 1-3, 3-4 1-4, 2-3, 2-4
Table 4-4 Omittable measurements for simplified 3-port TRL calibration
Ports used Omittable measurement
Ports 1, 2, 3 2-3
Ports 1, 2, 4 2-4
Ports 1, 3, 4 1-4
Ports 2, 3, 4 2-4