DADiSP / TDMS 2.2
TDM/TDMS File Format
anagement file format, or TDM, is a hierarchical, binary data file
format designed to store data from common test and measurement applications. The
treaming format, TDMS
, was introduced by
National Instruments to facilitate high speed data streaming in a structured
and easily exchangeable data file format. TDMS files are often employed by
and other National Instruments applications.
A TDM/TDMS file is organized in terms of groups and channels where a single file
can contain multiple groups and a single group can contain multiple channels. This
format is analogous to DADiSP's own internal Dataset (group) and Series (channels)
data storage scheme. In addition, each file, group and channel can contain multiple
user defined properties to help document the data.
When processing a TDM/TDMS file, an auto-generated
optimizes access to the data parameters, increasing the speed of read operations on large data
DADiSP/TDMS directly loads TDM/TDMS data files and automatically
sets sample rate, time offset and engineering
unit information for each channel. The channels can be loaded into
separate Windows or combined into a single Window for display. Channel loading
is optimized and buffered to provide quick access to large data files. X
values can be specified from a common X channel and irregularly spaced series
can be converted to more efficient regularly spaced series.
TDMS Export Series
DADiSP/TDMS allows one or more DADiSP dataset series to be saved to a TDM/TDMS file. Each dataset
name is mapped to a TDM/TDMS group name and each series name is mapped to a
TDM/TDMS channel name. New series can be added to existing TDMS files.
TDMS Data Formats
A variety of binary data formats are supported, including 8-bit
integer, single and double precision float values
Simple Menu Interface
DADiSP/TDMS runs from the DADiSP worksheet and is accessed
by a press of a button. The TDMS user interface displays
important file information and supports the selection of individual
TDMS groups and channels.
Full Analysis System
DADiSP provides a complete analysis, display and processing
environment using TDMS data. The integration of
DADiSP/TDMS into DADiSP makes it easy to automate data import
and analysis applications through SPL (Series Processing
Language), macros, and command files.
DADiSP/TDMS requires DADiSP 6.7 B01
for information about updating your current
version of DADiSP.
(1) TDMS file image
copyright by National Instruments.
(2) LabVIEW is a trademark of National Instruments.