7- 6
Operating Concepts
Processing
Processing
The analyzer's receiver converts the R, A, and B input signals into useful measurement information. This
conversion occurs in two main steps:
• The swept high frequency input signals are translated to fixed low frequency IF signals, using analog
sampling or mixing techniques. (Refer to the service guide for more details on the theory of operation.)
• The IF signals are converted into digital data by an analog to digital converter (ADC). From this point on,
all further signal processing is performed mathematically by the analyzer microprocessors.
The following paragraphs describe the sequence of math operations and the resulting data arrays as the
information flows from the ADC to the display. They provide a good foundation for understanding most of the
response functions, and the order in which they are performed.
Figure 7-2 is a data processing flow diagram that represents the flow of numerical data from IF detection to
display. The data passes through several math operations, denoted in the figure by single line boxes. Most of
these operations can be selected and controlled with the front panel response block menus. The data,
stored in arrays along the way and denoted by double line boxes, are places in the flow path where data is
accessible via GPIB.
Figure 7-2 Data Processing Flow Diagram
To Next Page
Loading...
Need help?
General
