Tektronix RFA300A, Руководство пользователя

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RFA300A Measurement Set 8VSB
D- 1
Appendix D: Mask File Formatting
The mask-testing feature allows you to set visual parameters within the graphic
portion of the measurement window. The masks are lines against which you can
compare waveforms.
To create your own mask files you must understand how they are formatted. This
section provides that information. For information on creating a specific mask,
refer to the online help: for example,
Creating Out of Channels Emission mask s.
Mask files have the following generic format:
H
Mask files are stored as text files. You can create them using a text editor.
H
The extension on a mask file must be of the form “.mskxx” where xx is an
integer representing the ResultID value for the mask test result for this file
(see Line 1 below).
H
Mask files must be placed in C:\RFA300\Masks to be recognized.
The format of mask files is as follows:
H
Lines are delimited with the newline character.
H
Numbers on a line are comma delimited (the newline character is typically
generated with a carriage return in most text editors).
H
Line lengths are limited to 200 characters maximum.
H
Line 1 contains the ResultID value for the mask test result for this file. Refer
to Table D--1.
H
Line 2 contains a note associated with the file.
H
Line 3 contains a number that represents the number of points in the mask.
H
Lines 4 through x each contain one point in the mask. The format of this line
is (x, y1, y2), or (y, x1, x2). Normally masks are of the first form. If the
mask has a single value per x location, it will be (x, y1), otherwise if it has
two values per x location (for example, a min and a max), it will be of the
form (x, y1, y2).
H
A mask of the form (y, x1, x2) is one which does not necessarily have a
value for all x locations. x and y numbers are in integer or scientific format.
Table D--1 lists the ResultID for each type of mask.