Keysight Technologies 85058B, Руководство пользователя и сервисное руководство

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85058B/E 1-3
General Information
Calibration Kit Overview
frequency from ALL measured standards instead of using only the three standards specified in
the class definitions. If you are using a PNA, it is RECOMMENDED that you use Expanded
Math with the 85058B data-based model for the highest accuracy. Expanded Math has no
effect with the 85058E data-based model.
Polynomial Model
The polynomial models may be used with SmartCal (Guided) and the Unguided Mechanical
Calibration method of the PNA Cal Wizard. Polynomial models are less accurate than the
data-based models. The polynomial models define the calibration standards with traditional
four-term polynomial calibration standard modeling parameters. For the PNA, it is NOT
RECOMMENDED that the polynomial models be used if the most accurate results are desired.
If you’re calibrating over the full frequency range of the calibration kit, you may be prompted to
connect some calibration standards more than once. These standards are defined by using
multiple polynomial models to achieve the full frequency range of operation.
Unlike the data-based models, the polynomial models allow you to modify the definitions of
calibration standards like any other traditional model-based calibration kit. This is accomplished
with the Advanced Modify Cal Kit dialog box. For more information on modifying the definitions
of the calibration standards, refer to online PNA Help.
In the Modify Class Assignments dialog box, the “Expanded Math” feature is turned OFF by
default when a polynomial model is selected. It is NOT RECOMMENDED that you use
Expanded Math with a polynomial model unless the calibration kit includes overlapped banded
standards such as a sliding load.
Accuracy Ranking of the 1.85 mm Calibration Kits (item #1 has highest accuracy)
1. 85058B (Standard), data-based mode
2. 85058BP (Standard), polynomial model
3. 85058E (Economy), data-based model
4. 85058EP (Economy), polynomial model
1.85 mm Calibration Techniques
85058B (Standard) Calibration Kit
• Offset Short Calibration technique
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Files:
85058B Data-Based.ckt
85058BP Polynomial.ckt
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OSL/SSS
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“Lowband” definition of lowband load, open, and Short 1
85058E (Economy) Calibration Kit
• Broadband Load Calibration technique
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Files: