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As a DSA module, the NI 9229/9239 does not synchronize to other 
modules and free-runs at its own fixed rate.

For more information, refer to the 

 section of this 

document. 

The NI 9229/9239 does not have the Turbo Bit configuration byte.

The NI 9229/9239 have four channels with nominal ranges of ±10 V and 
±60 V respectively. Each channel has an associated LSB weight, which is 
the number of volts per bit, and an offset, which is the number of volts per 
bit measured when the inputs are grounded.

LSB weight is referred to as Gain in the object dictionary.

The calibration data is stored in a U32 array, though each Offset field 
(subindex 1, 3, 5, and so on) should be interpreted as a signed value.

Use the calibration coefficients with the following equation to generate 
corrected data:

Table 55.  NI 9229/9239 Scan List Format

LSB Weight

Unsigned

pV/LSB

Offset

Signed

nV

(

)

(

)∗ LSB

---------

⎝

⎠

⎛

⎞∗10

12

–

-------

⎝

⎠

⎛

⎞

⎩

⎭

⎨

⎬

⎧

⎫

(

)∗10

9

–

-------

⎝

⎠

⎛

⎞

⎭

⎬

⎫

–

=