NI PXIe-4464 Calibration Procedure
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© National Instruments
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7
3.
Start the task.
4.
Acquire readings with the NI PXIe-4464.
5.
On a per channel basis, average all of the acquired samples.
6.
Stop and clear the task.
7.
Compare the averaged values to the appropriate limits in Table 4. The average is the offset
at the -20 dB gain setting.
8.
Repeat steps 2 through 7 for each gain setting of the device. When performing step 2, set
the
gain
1
parameter to -10, 0, 10, 20, and 30 as required.
Table 3.
Gain Range and Corresponding Max and Min Voltages
Desired Gain Range (dB)
Max Voltage (V)
Min Voltage (V)
-20
42.4
-42.4
-10
31.6
-31.6
0
10.0
-10.0
10
3.16
-3.16
20
1.00
-1.00
30
0.316
-0.316
Table 4.
AI Offset Accuracy Limits
Device Gain
(dB)
As Found Test Limit
As Left Test Limit
Min (mV)
Max (mV)
Min (mV)
Max (mV)
-20
-9.0
9.0
-2.2
2.2
-10
-3.0
3.0
-0.75
0.75
0
-0.9
0.9
-0.25
0.25
10
-0.3
0.3
-0.1
0.1
20
-0.15
0.15
-0.05
0.05
30
-0.1
0.1
-0.05
0.05
1
Refer to Table 3 for the maximum and minimum voltages to specify to ensure the specified gain range is
used on the module.
