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National Instruments Corporation
25
NI 5450 Calibration Procedure
6.
Connect the calibrator test head directly to the channel 0 input of the
digitizer.
7.
Output the
Positive Offset
voltage listed in Table 9 for the current
iteration with a 1 M
Ω
load impedance.
8.
Wait 2,500 ms for the impedance matching of the calibrator to settle.
9.
Initiate a waveform acquisition using the niScope Initiate
Acquisition VI.
10. 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. The resulting value
is the
Measured Positive Input Voltage
LabVIEW VI
C/C++ Function Call
Call
niScope_Initiate
Acquisition
with the following
parameter:
vi
: The instrument handle from
niScope_init
LabVIEW VI
C/C++ Function Call
Call
niScope_FetchMeasurement
with
the following parameters:
vi
: The instrument handle from
niScope_init
timeout
:
1.0
channelList
:
"0"
scalarMeasFunction
:
NISCOPE_
VAL_VOLTAGE_AVERAGE