NI 5922 Calibration Procedure
24
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Trigger Sensitivity
Complete the following steps to verify trigger sensitivity for the external
trigger channel of the NI 5922.
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
:
10
•
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
:
15,000,000
•
minNumPts
:
1,000
•
refPosition
:
50.0
•
numRecords
:
50
•
enforceRealtime
:
NISCOPE_VAL_TRUE
4.
Call
niScope_ConfigureTriggerEdge
with the following
parameters:
•
triggerSource
:
VAL_EXTERNAL
•
level
:
0.03125
•
slope
:
NISCOPE_VAL_POSITIVE
•
triggerCoupling
:
NISCOPE_VAL_DC
•
holdoff
:
0
•
delay
:
0
Note
The trigger level is set to center the trigger hysteresis window at 0.0 V.
5.
Call
niScope_Commit
(niScope Commit VI) with the following
parameter:
•
vi
: The instrument handle you obtained from
niScope_init
