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National Instruments Corporation
G-9
Glossary
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
handle
pointer to a pointer to a block of memory; handles reference arrays and
strings. An array of strings is a handle to a block of memory containing
handles to strings.
handler
a device driver that is installed as part of the operating system of the
computer
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.
hardware
the physical components of a computer system, such as the circuit boards,
plug-in boards, chassis, enclosures, peripherals, cables, and so on
hardware triggering
a form of triggering where you set the start time of an acquisition and gather
data at a known position in time relative to a trigger signal
hex
hexadecimal
host
the host computer system where the Universal Serial Bus host controller is
installed
Hz
hertz
I
IBF
input buffer full signal
IBFA
input buffer bit for Port A
IBFB
input buffer bit for Port B
IBM
International Business Machines
IC
integrated circuit
ID
identification
