Agilent Technologies 4395A, Manual Change

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Data Processing
F ormat
This converts complex number pairs into a scalar representation for display , according to the
selected format. This includes group delay calculations . Note that, once complex data has been
formatted, it cannot be restored. See \Group Delay" for information on group delay principles .
Data Hold
This keeps the maximum or minimum value at each display point when the data hold function
is turned on .
Data Math
This calculates the complex ratio of the two (data/memory), the dierence (data0memory), or
summation (data+memory) when the data math function is selected. In addition, this function
multiplies the ratio , dierence , or summation by a constant, or subtracts a constant from them.
Data Trace Arrays
The results are stored in the data trace arrays . It is important to note those marker values and
marker functions are all derived from the data trace arrays . Limit testing is also performed on
this array . The data trace arrays are accessible via GPIB , or using the internal disk drive or the
memory disk.
Memory Trace Arrays
If the data-to-memory operation is performed, the data trace arrays are copied into the
memory trace arrays (data arrays are also copied into the memory array at same time). These
arrays are accessible using the internal disk drive or the memory disk. When accessed via
GPIB , these arrays are read-only .
Scaling
These operations prepare the formatted data for display on the LCD . This is where the
appropriate reference line position, reference line value , and scale calculations are performed.
A-6 Basic Measurement Theory