National Instruments VXI-MIO Series User Manual page 138

Glossary
signal
SIMM
SISOURCE
slot
S/s
STARTSCAN
statically configured device
system
system RAM
T
TC
THD
transfer rate
TRIG
trigger
TTL
VXI-MIO Series User Manual
Any communication between message-based devices consisting
of a write to a Signal register.
Single In-line Memory Module
SI counter clock signal
A position where a module can be inserted into a VXIbus
backplane. Each slot provides the 96-pin J connectors to interface
with the board P connectors. A slot can have one, two, or three
connectors.
Samples per Second—Used to express the rate at which a DAQ
board samples an analog signal.
start scan signal
A device whose logical address cannot be set through software;
that is, it is not dynamically configurable.
A system consists of one or more mainframes that are connected,
all sharing a common Resource Manager. Each device in a system
has a unique logical address.
RAM installed on a personal computer and used by the operating
system, as contrasted with onboard RAM.
terminal count—The highest value of a counter.
total harmonic distortion—The ratio of the total rms signal due to
harmonic distortion to the overall rms signal, in dB or percent.
The rate, measured in bytes/s, at which data is moved from source
to destination after software initialization and set up operations;
the maximum rate at which the hardware can operate.
trigger signal
Any event that causes or starts some form of data capture.
transistor-transistor logic
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