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NI 5122/5124/5142 Calibration Procedure
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© National Instruments
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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
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