Tektronix DAS 9221 Option 04, Руководство пользователя

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Glossary
DAS System User Manual
Glossary–7
Cursor
A marker representing a specific location on the terminal screen. There are
two types of cursors: a Data Cursor and a Field Cursor.
DAS/NT
A networked DAS system. The DAS is controlled over a network rather than
by a single terminal.
DAS/XP
The stand-alone DAS system. The system comes standard with a color terminal.
Data Cursor
A cursor used to temporarily mark a data sequence location. The data cursor
becomes active once a data window (for instance, a state display or timing
diagram) is opened.
Delta Mark
A user-placed mark (appears as a triangular delta symbol) on a timing
diagram display that can be used as either the start point or end point of a
delta time measurement.
Delta Time
The time difference between two points in memory. For example, the difference
between a trigger point and the data cursor in a timing diagram display.
Demultiplex
To identify and separate multiplexed signals (for instance, some signals from
a microprocessor). To separate different signals sharing the same line and
organize those signals into useful information.
Deskew
Removing or minimizing static time delay between signals with respect to
each other.
Display Menu
A general class of menus that allows you to view data that you have
acquired. Examples of display menus include State and Timing menus.
DNRZ
Delayed Non-Return to Zero data format. This format lets you specify a
delay value for the leading edge of a signal. The signal will remain asserted
until it is forced low by the next data value.
Don’t Care
A symbol (X) used in place of a numeric character to indicate that the value
of a channel or character is not to be considered.
Edge
A signal transition from low to high or high to low.