National Instruments NI 5922, Процедура калибровки

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NI 5922 Calibration Procedure 12 ni.com
Vertical Offset Accuracy
Complete the following steps to verify vertical offset accuracy of the
NI 5922. You must verify both channels and each iteration listed in
Table 3.
1. Disconnect all cabling from the BNC inputs of the NI 5922. No input
signal is needed because the NI 5922 internal 50
Ω
resistor connects
the input to ground.
2. Call
niScope_ConfigureChanCharacteristics
(niScope Configure Chan Characteristics VI) with the following
parameters:
• channelList :
"0"
• inputImpedance :
NISCOPE_VAL_50_OHM
• maxInputFrequency :
0
3. Call
niScope_ConfigureVertical
(niScope Configure
Vertical VI) with the following parameters:
• channelList :
"0"
• range : The Range value for the current iteration from Table 3
• offset :
0.0
• coupling :
NISCOPE_VAL_DC
• probeAttenuation :
1.0
• enabled :
NISCOPE_VAL_TRUE
4. Call
niScope_ConfigureHorizontalTiming
(niScope Configure
Horizontal Timing VI) with the following parameters:
• minSampleRate :
10,000,000
• minNumPts :
100,000
• refPosition :
50.0
• numRecords :
1
• enforceRealtime :
NISCOPE_VAL_TRUE
5. Call
niScope_InitiateAcquisition
. (niScope Initiate
Acquisition VI) with the following parameter:
• vi : The instrument handle you obtained from
niScope_init
6. Call
niScope_FetchMeasurement
(niScope Fetch
Measurement VI) with the following parameters:
• channelList :
"0"
• timeout :
1.0
• scalarMeasFunction :
NISCOPE_VAL_VOLTAGE_AVERAGE