National Instruments NI PCI-5122, Calibration Procedure, Page: 19 / 46

NI 5122/5124/5142 Calibration Procedure | © National Instruments | 19
5. Commit all the parameter settings to hardware using the niScope Commit VI.
6. Connect the calibrator test head directly to the channel 0 input of the digitizer and output
0.75 V with a 1 M
Ω load impedance.
7. Wait 2,500 ms for the impedance matching and frequency of the calibrator to settle.
8. Initiate a waveform acquisition using the niScope Initiate Acquisition VI.
9. Fetch a waveform from the digitizer and perform a voltage average measurement using the
niScope Fetch Measurement (poly) VI. Select the Measurement Scalar DBL instance of the
VI. This value is the
Measured Positive Voltage used in step 16.
LabVIEW VI C/C++ Function Call
Call
niScope_Configure
HorizontalTiming
with the
following parameters:
enforceRealtime :
NISCOPE_VAL_TRUE
numRecords :
1
vi : The instrument handle from
niScope_init
minSampleRate :
10,000,000
refPosition :
50.0
minNumPts :
100,000
LabVIEW VI C/C++ Function Call
Call
niScope_Commit
with
the following parameter:
vi : The instrument handle from
niScope_init
LabVIEW VI C/C++ Function Call
Call
niScope_Initiate
Acquisition
with the
following parameter:
vi : The instrument handle from
niScope_init