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Model T940 User Manual
Publication No. 980938 Rev. K
Terms and Acronyms A-2
Astronics Test Systems
Differential
A pair of signals representing a state when one is at a high level
the other is at a low level.
DR1
Driver/Receiver Board Type ‘1’ 32 channel LVTTL I/O.
DR2
Driver/Receiver Board Type ‘2’ 32 channel LVDS I/O.
DR3E
Driver/Receiver Board Type ‘3E’ 32 channel programmable I/O.
DR4
Driver/Receiver Board Type ‘4’ 48 channel programmable I/O.
DR7
Driver/Receiver Board Type ‘7’ 32 channel RS-422/485 I/O.
DR8
Driver/Receiver Board Type ‘8’ 32 channel TTL I/O.
DR9
Driver/Receiver Board Type ‘9’ 24 channel programmable I/O.
DRA
Driver/Receiver Board A
DRB
Driver/Receiver Board B
DRM
Digital Resource Module
DRS
Digital Resource Suite. A DRS is two or more adjacent DRMs
synchronized together to form a digital test system with more
than 64 channels.
DSA
Digital Sequencer A
DSB
Digital Sequencer B
DUT
Device Under Test
DVH
Drive Voltage High
DVL
Drive Voltage Low
ECL
Emitter-Coupled Logic
ECL TRG
VXI ECL trigger
EN
Enable
Error
A channel error is determined by comparing the channel
response to the expect/mask conditions of the Pattern data.
GND_REF
Ground reference output from the pin electronics devices
Good “0”
A signal generated when an input signal is less than CVL
Good “1”
A signal generated when an input signal is greater than CVH
Idle
An execution state that outputs the entire pattern set of a
specified step after a sequence burst. Pattern and record
memory cannot be accessed by the user.
Indeterminate
An “indeterminate” PASS/FAIL condition occurs if there is
neither a valid PASS nor a FAIL.
This is discussed in more detail in the
Jumping, Halting,
Counting and Logging Errors
section in
Chapter 8
.
I/O
Input/Output
Jump
Used to “Jump” out of the normal sequential flow of Sequence
Steps to another Sequence Step. The jump occurs at the end of
the sequence step after all of the patterns have been output.