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Chapter 2 Function Reference — Init_DA_Brds
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National Instruments Corporation 2-261 NI-DAQ FRM for PC Compatibles
• AO-2DC devices
– Analog Output defaults:
Mode = Unipolar (0 to 10 V).
Level = 0 V.
– Digital Input and Output defaults:
Direction = Input.
• DAQArb 5411 devices
– Defaults
Analog filter = On.
Digital filter = On.
Frequency correction for analog filter = Disabled.
Output attenuation = 0 decibels.
Output enable = Off.
Output impedance = 50 Ω.
PLL reference frequency = 20 MHz.
PLL reference source = Internal.
RTSI clock source = Disabled.
SYNC duty cycle = 50%.
Timebase = 40 MHz.
Trigger mode = Continuous.
Trigger source = Automatic (the software provides the triggers).
Update clock source = Internal.
• DSA devices
– Analog Input defaults
Gain = 0 dB.
Coupling = AC coupling.
Start Trigger = Automatic.
Stop Trigger = Disabled.
– Analog Output defaults
Attenuation = 0 dB
Output Enable = Off.
– Digital Input and Output defaults
Direction = Input.