National Instruments NI PXI-5922, Руководство пользователя, Страница: 15 / 21

NI 5922 Calibration Procedure | © National Instruments | 15
11. Repeat steps 1 through 10 for channel 1, changing the value of the channelList parameter
from
"0"
to
"1"
.
Vertical Gain Accuracy
Complete the following steps to verify vertical gain accuracy of the NI 5922. You must verify
both channels and each iteration listed in Table 6.
1.
Call
niScope_ConfigureChanCharacteristics
(niScope Configure Chan
Characteristics VI) with the following parameters:
•
channelList :
"0"
• inputImpedance :
NISCOPE_VAL_1_MEG_OHM
• maxInputFrequency :
0
2. Call
niScope_ConfigureVertical
(niScope Configure Vertical VI) with the
following parameters:
•
channelList :
"0"
• range : The Range value for the current iteration from Table 6
• offset :
0.0
• coupling :
NISCOPE_VAL_DC
• probeAttenuation :
1.0
• enabled :
NISCOPE_VAL_TRUE
3. 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
4. Call
niScope_Commit
(niScope Commit VI) with the following parameter:
• vi : The instrument handle you obtained from
niScope_init
5. Connect the DC voltage calibrator source to the channel 0 input of the oscilloscope and
output the positive voltage from Table 6 that corresponds to the vertical range used.
6. Wait 2,500 ms for the calibrator to settle.
7. Call
niScope_InitiateAcquisition
(niScope Initiate Acquisition VI) with the
following parameter:
•
vi : The instrument handle you obtained from
niScope_init
Table 5. NI 5922 Input Bias Current
Calibration Test Limit Published Specification
±350 nA ±500 nA