Справочник Пользователя для National Instruments 321645c-01

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

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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.