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National Instruments Corporation
61
NI 5450 Calibration Procedure
9.
Configure the calibrator to output the voltage listed under
Input (V)
in Table 19 (NI 5152), or Table 20 (NI 5153/5154) for the current
iteration. Configure the load impedance of the calibrator to 1 M
Ω
.
10. Wait 2,500 ms for the impedance matching of the calibrator to settle.
11. Adjust the vertical range using the niScope Cal Adjust Range VI.
12. Repeat steps 9 through 11 for each iteration in Table 20 (NI 5152), or
Table 21 (NI 5153/5154).
13. Using a BNC cable, connect REF FREQUENCY OUTPUT on the
back of the calibrator to the channel 0 input of the digitizer. Make sure
the output of the reference frequency is enabled and set to 10 MHz.
If you are not using a Fluke 9500B/Wavetek 9500 calibrator, connect
a precise 10 MHz, 1 V
pk-pk
sine or square wave source to the channel 0
input.
14. Calibrate the sample rate of the digitizer using the niScope Cal Adjust
VCXO VI.
Note
The 10 MHz stimulus is automatically taken from channel 0.
15. Disconnect or disable all inputs to the digitizer.
LabVIEW VI
C/C++ Function Call
Call
niScope_CalAdjustRange
with
the following parameters:
vi
: The instrument handle from
niScope_CalStart
channelName
:
"NISCOPE_VAL_EXTERNAL"
range
: The
Range
value listed in Table 20
(NI 5152), Table 21 (NI 5153/5154) for
the current iteration
stimulus
: The
Input (V)
value listed in
Table 20 (NI 5152), Table 21
(NI 5153/5154) for the current iteration
LabVIEW VI
C/C++ Function Call
Call
niScope_CalAdjust
VCXO
with the following parameters:
vi
: The instrument handle from
niScope_CalStart
stimulusFreq
:
10,000,000