National Instruments PCI-1200 用户手册
Glossary
© National Instruments Corporation
G-7
S
samples
scan
one or more analog or digital input samples. Typically, the number of input
samples in a scan is equal to the number of channels in the input group. For
example, one pulse from the scan clock produces one scan which acquires
one new sample from every analog input channel in the group.
samples in a scan is equal to the number of channels in the input group. For
example, one pulse from the scan clock produces one scan which acquires
one new sample from every analog input channel in the group.
SCXI
Signal Conditioning eXtensions for Instrumentation—the National
Instruments product line for conditioning low-level signals within an
external chassis near sensors so only high-level signals are sent to DAQ
boards in the noisy PC environment
Instruments product line for conditioning low-level signals within an
external chassis near sensors so only high-level signals are sent to DAQ
boards in the noisy PC environment
signal conditioning
the manipulation of signals to prepare them for digitizing
STB
strobe input signal
T
t
d
minimum period
t
gh
gate hold time
t
gsu
gate setup time
t
gwh
gate high level
t
gwl
gate low level
t
m
minimum pulse width
t
outc
output delay from gate
t
outg
output delay from clock
t
pwh
clock high level
t
pwl
clock low level
TTL
transistor-transistor logic
typ
typical