NI 9229 - Page 9

8 | ni.com | NI 9229/9239 Calibration Procedure
2. Configure function generator according to Table 9.
3. Set the function generator frequency to a value indicated in Table 12.
4. Acquire and average samples.
a. Create and configure an AI voltage task on the NI 9229/9239 according to Table 10.
b. Configure the AI voltage task timing according to Table 3.
c. Enable the function generator.
d. Start the task.
e. Read samples.
f. Disable the function generator.
g. Clear the task.
5. Calculate the phase for each channel on the NI 9229/9239. NI recommends using the
Extract Single Tone Information VI to calculate phase.
Table 9. Function Generator Configuration for Phase Matching Verification
Signal Type Amplitude (V
pk
)
Sinewave 9
Table 10. NI 9229/9239 Configuration for Phase Matching Verification
Module
Physical
Channels
Min (V) Max (V)
Scaled
Units
Terminal
Configuration
9229 AI0:3 -60 60 Vo l t s Differential
9239 AI0:3 -10 10 Vo l t s Differential
Table 11. NI 9229/9239 Timing Configuration
Sample Mode Samples Per Channel Rate
Finite Samples 25000 50000