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NI 5122/5124/5142 Calibration Procedure
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. Configure
the calibrator to output a 50 kHz sine wave with peak-to-peak voltage amplitude set to half
the vertical range of the digitizer. Configure the load impedance of the calibrator to match
the input impedance of the digitizer.
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 RMS measurement using the
niScope Fetch Measurement (poly) VI. Select the Measurement Scalar DBL instance of the
VI. This value is the
Measured RMS Voltage of 50 kHz Sine Wave
used in step 11e.
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
:
30,000
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