Tektronix DAS 9221 Option 04, Руководство пользователя

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Glossary
DAS System User Manual
Glossary–15
Symbolic Radix
A format that allows you to substitute mnemonics (names) for radix numbers
when using menus. You enter your own mnemonics into the Symbol Table
menu. The logic analyzer will replace radixes throughout the menu structure
with these assigned values.
Synchronous Acquisition
An acquisition made using a clock external to the logic analyzer. Such a
clock is usually generated by the user’s circuitry and is therefore synchro-
nous to it. This external clock may or may not be periodic.
System Software
System-level software stored on a hard disk and loaded into system memory
at power on. All logic analyzer operations require this software.
Threshold
A voltage to which input signals are compared.
Time Base
Source of the acquisition clock. The time base can be selected to be an
internal source, a single external source, or a Boolean combination of several
external signals. (See also Acquisition Clock, External Clock, and Internal
Clock.)
Time Base Bus
Provides four programmatic time bases useable by any modules for
asynchronous acquisition and timestamp operations. (See also Timestamp.)
Timer
A device that lets you make time measurements during a data acquisition.
Timestamp
A separate clock value stored with each acquisition cycle. Provides
performance analysis features and time correlation for multiple acquisition
memories and timing measurements.
Timing Display
Graphic representation of data states and timing relationships as digital
(two-state) waveforms.
TLA 510 Logic Analyzer
A self-contained 100 MHz Logic Analyzer. The TLA 510 Logic Analyzer
operates similar to a DAS mainframe with a single 92C96 Data Acquisition
Module. Setups from the TLA 510 Logic Analyzer can be restored to a DAS
mainframe with one or more 92C96 Data Acquisition Modules.