User`s guide

7-63
Operating Concepts
Modifying Calibration Kits
The number of standard classes required depends on the type of calibration being
performed, and is identical to the number of error terms corrected. A response calibration
requires only one class, and the standards for that class may include an open, or short, or
thru. A 1-port calibration requires three classes. A full 2-port calibration requires 10
classes, not including two for isolation.
The number of standards that can be assigned to a given class may vary from none (class
not used) to one (simplest class) to seven. When a certain class of standards is required
during calibration, the analyzer will display the labels for all the standards in that class
(except when the class consists of a single standard). This does not, however, mean that all
standards in a class must be measured during calibration. Unless band-limited standards
are used, only a single standard per class is required.
NOTE It is often simpler to keep the number of standards per class to the bare
minimum needed (often one) to avoid confusion during calibration.
Each class can be given a user-definable label as described under label class menus.
Standards are assigned to a class simply by entering the standard's reference number
(established while defining a standard) under a particular class. The following is a
description of the softkeys located within the specify class menu:
• allows you to enter the standard numbers for the first class required for an S
11
1-port calibration. (For default calibration kits, this is the open.)
• allows you to enter the standard numbers for the second class required for an
S
11
1-port calibration. (For default calibration kits, this is the short.)
• allows you to enter the standard numbers for the third class required for an S
11
1-port calibration. (For default calibration kits, this is the load.)
• allows you to enter the standard numbers for the first class required for an S
22
1-port calibration. (For default calibration kits, this is the open.)
• allows you to enter the standard numbers for the second class required for an
S
22
1-port calibration. (For default calibration kits, this is the short.)
• allows you to enter the standard numbers for the third class required for an S
22
1-port calibration. (For default calibration kits, this is the load.)
• allows you to enter the standard numbers for the forward transmission
thru calibration. (For default calibration kits, this is the thru.)
• allows you to enter the standard numbers for the reverse transmission
(thru) calibration. (For default calibration kits, this is the thru.)
• allows you to enter the standard numbers for the forward match (thru)
calibration. (For default calibration kits, this is the thru.)
• allows you to enter the standard numbers for the reverse match (thru)
calibration. (For default calibration kits, this is the thru.)
S11A
S11B
S11C
S22A
S22B
S22C
FWD TRANS
REV TRANS
FWD MATCH
REV MATCH