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- DATA FILE EDITOR
-
-
- 1. GENERAL DESCRIPTION
-
- The data file editor is used for writing and editing
- files used for TWO, ONE, IMS, and IMP commands. When used by
- the program during response analysis, a least mean square
- polynomial, up to tenth order, is used to define the data.
- The order of the fit is determined by the program, preventing
- the user from selecting an order that would result in severe
- oscillations in the data fitting. The polynomial coefficients
- are generated when exiting the network editor. Since data
- fitting is valid only between the endpoints of the supplied
- data, the user is advised not to rely on any results that are
- derived through extrapolation.
- When first entering from the network editor, and when
- starting a new file from within the editor, the program will
- ask the user to establish whether or not the subsequent ses-
- sion is to be for two-port data, to be used for TWO commands.
- Any answer other than "Y" will cause the editor to operate in
- the one-port/impedance mode.
- When entering or modifying data, the user will be promp-
- ted by the screen. The frequency is always entered in GHz.
- In entering two-port data, the S-parameters defining the ele-
- ment, normalized to 50 ohms, are entered in polar form. No
- provision has been made for other types of two-port parameters
- (y-, h-, or z-parameters). In the case of one-port data, the
- reflection coefficients, normalized to 50 ohms, are entered
- in polar form. For impedances, the resistances and reactances
- are entered in ohms. Up to 20 discrete points may be entered,
- and they must be arranged in ascending order by frequency.
- Data files are intended to be saved on disk. When exit-
- ing the editor, the data in memory is irretrivably lost.
- Therefore, if you intend to keep the data file that you have
- written, you must save it on disk prior to exiting the editor.
-
-
- 2. MENU OPTIONS
-
- Except for the following, the menu options available
- function in the same manner as do those for the network editor,
- to which you should refer to for assistance. The exceptions
- are:
-
- LIST DATA FILE ..... Lists the entire data file in
- two pages. The first page lists
- S11 and S22. The second page
- lists S21 and S12. In both
- listings, the user will be asked
- if a hard copy is desired.
-
-
-
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