Agilent Technologies 85052D, Руководство пользователя и сервисное руководство

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A-8 85052D
Standard Definitions
Nominal Standard Definitions
Nominal Standard Definitions
Standard definitions provide the constants needed to mathematically model the electrical
characteristics (delay, attenuation, and impedance) of each calibration standard. The
nominal values of these constants are theoretically derived from the physical dimensions
and material of each calibration standard, or from actual measured response. These values
are used to determine the measurement uncertainties of the network analyzer. The
standard definitions in
Tables A-7 through A-9 list typical calibration kit parameters used
by the following network analyzers to specify the mathematical model of each device. This
information must be loaded into the network analyzer to perform valid calibrations. Refer
to your network analyzer user’s guide for instructions on loading calibration constants.
NOTE The values in the standard definitions table are valid only over the specified
operating temperature range.
Setting the System Impedance
This kit contains only 50 ohm devices. Ensure the system impedance (Z
0
) is set to 50 ohms.
Refer to your network analyzer user’s guide for instructions on setting system impedance.
Version Changes
Class assignments and standard definitions may change as more accurate model and
calibration methods are developed. The disk shipped with the kit for use with the 8510 will
contain the most recent version. The default version that comes with the 872x network
analyzer firmware may be outdated.