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Lab-NB User Manual Index-8 © National Instruments Corporation
programming analog output
circuitry, 4-52
specifications and ratings, 2-20 to 2-21
waveform generation timing
(figure), 2-20
F
fax technical support, E-1
freerun acquisition mode
counter A0 required, 3-5
multiple A/D conversions on single
input channel, 4-43 to 4-45
selecting analog input channel, gain,
and timebase for Counter A0, 4-43
multiple A/D conversions using external
timing, 4-51
posttrigger mode, 4-51
pretrigger mode, 4-51
overview, 4-39
frequency measurement, 2-22
application (figure), 2-23
fuse replacement, 2-7
G
GAIN<2..0> bit, 4-8
GATA0 bit
description, 4-9
disabling EXTCONV* and EXTTRIG
input, 4-47, 4-49
initiating multiple A/D conversion DAQ
operation using EXTCONV*, 4-46
GATA1 bit, 4-9
GATB0 signal (table), 2-7
GATB1 signal (table), 2-7
GATB2 signal (table), 2-7
GATE signal
counter block diagram, 3-11
general-purpose timing, 2-21 to 2-24
specifications and ratings, 2-23
timing requirements (figure), 2-24
general-purpose timing signal connections,
2-21 to 2-24
event-counting, 2-21
application with external switch
gating (figure), 2-22
frequency measurement, 2-22
application (figure), 2-23
GATE, CLK, and OUT signals, 2-21
to 2-24
requirements for (figure), 2-24
pulse and square wave generation, 2-21
pulse-width measurement, 2-22
specifications and ratings for 8253 I/O
signals, 2-23
time-lapse measurement, 2-22
getting started with Lab-NB, 1-2
I
IBF signal
description (table), 2-13
mode 1 input timing, 2-14
mode 2 bidirectional timing, 2-16
IBFA bit, 4-60, 4-64
IBFB bit, 4-60
initializing Lab-NB board, 4-35 to 4-36
input multiplexer, analog input circuitry, 3-4
installation, 2-5
INT bit, 4-33
INTE1 bit, 4-64
INTE2 bit, 4-64
INTEA bit, 4-60, 4-62
INTEB bit, 4-60, 4-62
Interrupt Control Register group, 4-30
to 4-34
Interrupt Control Register, 4-31 to 4-32
Interrupt Status Register, 4-33
overview, 4-30
register map, 4-3
Timer Interrupt Clear Register, 4-34
interrupt programming, 4-65
analog input circuitry, 4-52
analog output circuitry, 4-54 to 4-55
digital I/O circuitry, 4-65
INTR signal
description (table), 2-13
mode 1 input timing, 2-14
mode 1 output timing, 2-15
mode 2 bidirectional timing, 2-16
INTRA bit, 4-60, 4-62, 4-64