Glossary
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National Instruments Corporation
G-7
GPCTR0_SOURCE
general purpose counter 0 clock source signal
GPCTR0_UP_DOWN
general purpose counter 0 up down
GPCTR1_GATE
general purpose counter 1 gate signal
GPCTR1_OUT
general purpose counter 1 output signal
GPCTR1_SOURCE
general purpose counter 1 clock source signal
GPCTR1_UP_DOWN
general purpose counter 1 up down
GPIB
General Purpose Interface bus, synonymous with HP-IB. The standard bus
used for controlling electronic instruments with a computer. Also called
IEEE 488 bus because it is defined by ANSI/IEEE Standards 488-1978,
488.1-1987, and 488.2-1987.
grounded measurement
system
See referenced single-ended configuration.
H
h
hour
half-power bandwidth
the frequency range over which a circuit maintains a level of at least –3 dB
with respect to the maximum level
handshaked digital I/O
a type of digital acquisition/generation where a device or module accepts
or transfers data after a digital pulse has been received. Also called latched
digital I/O.
hex
hexadecimal
Hz
hertz—the number of scans read or updates written per second
I
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
I
OH
current, output high