China Electronics Technology Instruments AV3672 Series, Руководство пользователя

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7 Calibration
7.6 Editing of Calibration Kit Definition
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[Type information] dialog box
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[Add standard] dialog box
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[Open-circuit device] dialog box
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[Short-circuit device] dialog box
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[Load] dialog box
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[Through type/transmission line/adapter] dialog box
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7.6.1 Calibration Kit Definition
Each standard calibration kit (represented by the standard kit ID) is a specific and accurately defined physical
device. For example, ID1 of 85056A calibration kit means a 2.4mm male open-circuit device. Standard kits are
divided into four types: open-circuit device, short-circuit device, load and through type device/adapter/air line.
Each type of calibration kit is has the specific model structure, including the number and physical characteristics of
the standard kit. The majority of calibration kits are equipped with a group of adapters subject to accurate phase
matching. The other standard calibration kits must be defined before use.
7.6.2 Custom Calibration Kit
Sometimes you may need to edit the calibration kit definition file or create the user-defined calibration kit. In most
of measurement applications, the default calibration kit model is suitable for accurate calibration. However, the
user-defined calibration kit should be created in the following applications.
➢
The connector type is different from that defined in the calibration kit model.
➢
The standard calibration kit different from the defined is used. For example, use three short-circuit devices of
different deviations instead of the open-circuit device, short-circuit device and load in one-port calibration.
➢
Improve the accuracy of the predefined calibration kit model. If the actual properties of the standard
calibration kit can be described with the model, the calibration will be more accurate. For example, change the
load impedance into 50.1Ω, instead of the defined 50Ω.
To create the user-defined calibration kit, first define the connector type, such as APC7, 3.5mm, APC2.4mm (50Ω),
etc. Although more than one connector type can be defined, it is preferred to define one connector type for each
kind of calibration kit. The female and male connectors must be defined separately.
7.6.3 Create Calibration Kit
1) Click [Cal] > [Edit calibration kit...] . The [Edit calibration kit] dialog box will appear.
2) Click [Insert new calibration kit] . The [Edit calibration kit] dialog box will appear.
a) Input the name of the user-defined calibration kit in the [Calibration kit name] box.
b) Click [Add] in the connector type zone. The [Add connector] dialog box will appear.
3) In the [Add connector] dialog box:
a) Enter the connector name in the name box.
b) Select the connector type of the calibration kit in the connector type zone: [Female], [Male] or [No Gender] .
c) Set the minimum and maximum working frequency range of the connector in the frequency range zone.
d) Enter the characteristic impedance (such as 50Ω) of the connector in the
impedance zone [Z0] .
e) Select the connector medium type in the [Medium] box: coaxial or waveguide .
f) Check the entered contents and click [OK] to close the dialog box. Then it is not allowed to edit connector
information.
g) The connector of the other polarity can be added by click [Add] in the connector type zone of the [Edit
calibration kit] dialog box and repeated the above steps.