National Instruments 1128 用户手册
Glossary
© National Instruments Corporation
G-3
H
handshaking
the use of two trigger lines between two instruments, such as a switch and
a DMM, to synchronize their actions
a DMM, to synchronize their actions
hardware-timed scanning the measurement instrument communicates via digital trigger signals
HVAB
high-voltage analog bus
Hz
hertz—the number of scans read or updates written per second
I
in.
inches
I/O
input/output—the transfer of data to/from a computer system involving
communications channels, operator interface devices, and/or data
acquisition and control interfaces
communications channels, operator interface devices, and/or data
acquisition and control interfaces
M
MB
megabytes of memory
matrix
superset of multiplexer; consists of connected rows and columns that
allows for a direct connection from any row to any column
allows for a direct connection from any row to any column
multiplexer
a switching device with multiple inputs that sequentially connects each
of its inputs to its output, typically at high speeds, in order to measure
several signals with a single analog input channel
of its inputs to its output, typically at high speeds, in order to measure
several signals with a single analog input channel
N
NI-SWITCH
an IVI-based instrument driver that supports the National Instruments line
of switch cards
of switch cards
P
PXI
PCI with extensions for instrumentation