Changing The Calibration Kit Definition; Definitions Of Terms - Agilent Technologies ENA Series User Manual

Calibration

Changing the Calibration Kit Definition

Changing the Calibration Kit Definition
In most measurements, the user can use pre-defined calibration kits as they are. However, it
may be necessary to change the definition of a calibration kit (or create a new one) when a
special standard is used or a high degree of accuracy is demanded. When it is necessary to
change the definition of a calibration kit that contains a calibration device but no
calibration kit model, the user must fully understand error correction and the system error
model.
A user-defined calibration kit may be used in the following circumstances.
• When the user wants to use connectors other than those pre-defined in the calibration
kits for the E5070A/E5071A (e.g., a SMA connector).
• When the user wants to use different standards in place of one or more standards
pre-defined in the E5070A/E5071A. For example, when three offset SHORT standards
are used instead of OPEN, SHORT, and LOAD standards.
• When the user wants to modify the standard model of a pre-defined calibration kit and
turn it into a more accurate model. It is possible to perform better calibration if the
performance of the actual standard is reflected in the standard model better. For
example, define the 7 mm load standard as 50.4 W instead of 50.0 W.

Definitions of Terms

The terms used in this section are defined as follows:
Standard
Standard type
Standard coefficient
Standard class
110
An accurate physical device, for which the model
is clearly defined, and is used to determine system
errors. With the E5070A/E5071A, the user may
define up to 21 standards per calibration kit. Each
standard is numbered, from 1 through 21. For
example, standard 1 for the 85033E 3.5 mm
calibration kit is a SHORT standard.
The type of standard used to classify a standard
model based on its form and construction. Five
standard types are available: SHORT, OPEN,
LOAD, delay/THRU, and arbitrary impedance.
The numeric characteristics of the standard used
in the selected model. For example, the offset
delay (32 ps) of the SHORT standard in the 3.5
mm calibration kit is a standard coefficient.
A group of standards used in a calibration process.
For each class, the user must select the standards
to use from the 21 available standards.
Chapter 4