National Instruments NI 5922, Процедура калибровки

Страница: 21 / 28

© National Instruments Corporation 21 NI 5922 Calibration Procedure
2. Call
niScope_ConfigureVertical
(niScope Configure
Vertical VI) with the following parameters:
• channelList :
"0"
• range : The Range value for the current iteration in Table 8
• 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 : The Sample Rate value for the current iteration
in Table 8
• minNumPts :
500
• refPosition :
50.0
• numRecords :
400
• enforceRealtime :
NISCOPE_VAL_TRUE
4. Call
niScope_ConfigureTriggerEdge
(niScope Configure
Trigger Edge VI) with the following parameters:
• triggerSource :
"0"
• level :
–0.1
• slope :
NISCOPE_VAL_POSITIVE
• triggerCoupling :
NISCOPE_VAL_DC
• holdoff :
0
• delay :
0
5. Call
niScope_Commit
(niScope Commit VI) with the following
parameter:
• vi : The instrument handle you obtained from
niScope_init
6. Connect the scope calibrator to the channel 0 input of the digitizer.
Configure the calibrator as follows:
a. Set the calibrator to rising edge (500 ps) output mode.
b. Set the frequency to 500 Hz.
c. Set the peak-to-peak voltage amplitude to one tenth of the vertical
range used in step 2.
d. Set the load impedance of the calibrator to 50
Ω
.
7. Wait 1,000 ms for the impedance matching of the calibrator to settle.