Agilent Technologies 8712ES, Programmer'S Manual

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Programmer’s Guide 6-15
Trace Data Transfers
Accessing Other Measurement Arrays
The Error Coefficient arrays contain default correction values or values
created during a measurement calibration. These arrays can be queried
and set, but care should be exercised in setting them since incorrect
measurements may result. If you wish to apply your own corrections in
addition to the analyzer's current correction, the best technique is to use
the Corrected Memory array and the Data/Memory feature, explained
below.
The Corrected Data array contains the results of the currently selected
measurement (Transmission, Reflection, etc.) after error correction and
averaging have been applied. The measurement data in these arrays is
represented as complex number pairs. When measuring the
transmission response of a through cable, the magnitude of the complex
numbers will be very close to 1.0. When measuring an open circuit, the
magnitude of the complex numbers will be very close to 0.0. When
measuring an amplifier, the magnitude of the complex numbers will be
greater than 1.0.
The Corrected Memory array is filled with a copy of the Corrected Data
array when the Data
−
> Memory operation is performed. It can be used
to apply a gain correction to the measured data. This is described in the
following section.
The Formatted Data array contains the measurement data after it has
been formatted using the format selected by the [FORMAT] menu.
Querying the Formatted Data array is described in detail at the
beginning of this chapter. You can also download data to this array, and
the analyzer will display the data using the current Scale and Reference
values.