7- 62
Operating Concepts
Modifying Calibration Kits
are negligible in waveguide, so enter 0 as the loss offset.)
• allows you to specify the characteristic impedance of the coax offset. (Note: This is not
the impedance of the standard itself.) For waveguide, the offset impedance as well as the system Z0
must always be set to 1
.
• allows you to define the lowest frequency at which the standard can be
used during measurement calibration. In waveguide, this must be the lower cutoff frequency of the
standard, so that the analyzer can calculate dispersive effects correctly (see
).
• allows you to define the highest frequency at which the standard can
be used during measurement calibration. In waveguide, this is normally the upper cutoff frequency of the
standard.
• defines the standard (and the offset) as coaxial. This causes the analyzer to assume linear
phase response in any offsets.
• defines the standard (and the offset) as rectangular waveguide. This causes the
analyzer to assume a dispersive delay (see ).
Label Standard Menu
This menu allows you to label (reference) individual standards during the menu-driven measurement
calibration sequence. The labels are user-definable using a character set shown on the display that includes
letters, numbers, and some symbols, and they may be up to ten characters long. The analyzer will prompt
you to connect standards using these labels, so they should be meaningful to you, and distinct for each
standard.
By convention, when sexed connector standards are labeled male (m) or female (f), the designation refers to
the test port connector sex, not the connector sex of the standard.
Specify Class Menu
Once a standard has been defined, it must be assigned to a standard "class." This is a group of from one to
seven standards that is required to calibrate for a single error term. The standards within a single class can
be assigned to the locations listed in
Ta b le 7-2 according to their standard reference numbers.
A class often consists of a single standard, but may be composed of more than one standard if band-limited
standards are used. For example, if there were two load standards—a fixed load for low frequencies, and a
sliding load for high frequencies—then that class would have two standards.
Tab le 7-2 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
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