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NI 5122/5124 Calibration Procedure
24
ni.com
Note
The same time source is used for both channel 0 and channel 1, so you only need to
verify the timing accuracy on one channel.
You have finished verifying the timing accuracy of the NI 5122/5124.
Bandwidth and Flatness
Complete the following steps for each of the six configurations listed in
Table 10 (NI 5122) or Table 11 (NI 5124) to verify the bandwidth and
flatness for each digitizer channel.
1.
Call
niScope_ConfigureChanCharacteristics
(niScope
Configure Chan Characteristics VI) with the following parameters:
•
channelList
:
"0"
•
inputImpedance
: The Input Impedance value for the current
iteration in Table 10 (NI 5122) or Table 11 (NI 5124)
•
maxInputFrequency
: The Maximum Input Frequency for the
current iteration in Table 10 (NI 5122) or Table 11 (NI 5124)
2.
Call
niScope_ConfigureVertical
(niScope Configure
Vertical VI) with the following parameters:
•
channelList
:
"0"
•
range
: The Range value for the current iteration in Table 10
(NI 5122) or Table 11 (NI 5124)
•
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
:
30,000
•
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 calibrator test head directly to the channel 0 input of the
digitizer. Configure the calibrator to output a 50 kHz sine wave with
peak-to-peak voltage amplitude set to half the vertical range of the