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T able 6-5. Standard Class Assignments
Calibration Kit Label:
Disk File Name:
Class Standard Reference Numbers Standard
Class Label
1 2 3 4 5 6 7 8
S
11
A
S
11
B
S
11
C
S
22
A
S
22
B
S
22
C
F orward
Transmission
Reverse
Transmission
F orward Match
Reverse Match
Response
Response and
Isolation
TRL thru
TRL reect
TRL line or match
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-denable label as described under label class menus .
Standards are assigned to a class simply by entering the standard's reference number
(established while dening a standard) under a particular class . The following is a description
of the softkeys located within the specify class menu:
NNNNNNNNNNNNNN
S11A allows you to enter the standard numbers for the rst class required for an S
11
1-port
calibration. (F or default calibration kits , this is the open.)
6-82 Application and Operation Concepts