Glossary
G-8
ni.com
floating signal so
u
rces
Signal so
u
rces with voltage signals that are not connected to an absol
u
te
reference of system gro
u
nd. Also called non-referenced signal so
u
rces.
Some common examples of floating signal so
u
rces are batteries,
transformers, and thermoco
u
ples.
FREQ OUT
Freq
u
ency O
u
tp
u
t signal.
freq
u
ency
The n
u
mber of alternating signals that occ
u
r per
u
nit time.
ft
Feet.
f
u
nction
1. A b
u
ilt-in exec
u
tion element, comparable to an operator, f
u
nction, or
statement in a conventional lang
u
age.
2. A set of software instr
u
ctions exec
u
ted by a single line of code that may
have inp
u
t and/or o
u
tp
u
t parameters and ret
u
rns a val
u
e when exec
u
ted.
G
glitch
An
u
nwanted signal exc
u
rsion of short d
u
ration that is
u
s
u
ally
u
navoidable.
GND
See
gro
u
nd.
gro
u
nd
1. A pin.
2. An electrically ne
u
tral wire that has the same potential as the
s
u
rro
u
nding earth. Normally, a nonc
u
rrent-carrying circ
u
it intended for
safety.
3. A common reference point for an electrical system.
H
hardware
The physical components of a comp
u
ter system, s
u
ch as the circ
u
it boards,
pl
u
g-in devices, chassis, enclos
u
res, peripherals, and cables.
hardware triggering
A form of triggering where yo
u
set the start time of an acq
u
isition and
gather data at a known position in time relative to a trigger signal.
Hz
1. Hertz—The SI
u
nit for meas
u
rement of freq
u
ency. One hertz (Hz)
eq
u
als one cycle per second.
2. The n
u
mber of scans read or
u
pdates written per second.
