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NI 5450 Calibration Procedure
30
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4.
Configure the horizontal properties using the niScope Configure
Horizontal Timing VI.
5.
Commit all the parameter settings to hardware using the niScope
Commit VI.
6.
Connect the scope calibrator test head directly to the channel 0 input
of the digitizer. Configure the calibrator to output an exact 11 MHz
sine wave with 1 V
pk-pk
amplitude and 50
Ω
load impedance.
7.
Wait 2,500 ms for the impedance matching and frequency of the
calibrator to settle.
8.
Read the last external cal temperature using the niScope Cal Fetch
Temperature VI.
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
:
250,000,000
refPosition
:
50.0
minNumPts
:
2,500,000
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_CalFetchTemperature
with the following parameter:
whichTemperature
: External Calibration