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National Instruments Corporation
49
NI 5622 Calibration Procedure
13. Repeat steps 13a through 13e until you reach the
Stop Frequency
for
the current iteration in Table 10.
a.
Configure the signal generator to generate a 0.8 V
pk-pk
sine wave
with a frequency equal to the following formula:
Frequency
= (
Start Frequency
+ (
Index
×
Frequency Step
))
for the current iteration in Table 10.
b.
Wait the amount of time the manufacturer recommends for the
output to settle.
c.
Measure the power (in watts) of the sine wave using the power
meter. This value is the
Power Meter Measure Sine Wave Power
.
Use this value to calculate the
Measured Sine Wave Amplitude
used in step 13d.
where
a
=
Power Meter Measure Sine Wave Power
b =
Splitter Power Correction
d.
Adjust the frequency response using the niScope Cal Adjust
Frequency Response VI.
e.
Increment Index by 1.
14. Repeat steps 12 and 13 for each iteration in Table 10.
15. Disconnect or disable all inputs to the digitizer.
LabVIEW VI
C/C++ Function Call
Call
niScope_CalAdjustFrequency
Response
with the following parameters:
sessionHandle
: The session handle from
niScope_CalStart
channelName
:
“0”
range
:
1
stimulusAmp
: The
Measured Sine Wave
Amplitude
value
stimulusFreq
: The current frequency the
signal generator is generating
Measured Sine Wave Amplitude
10
a
×
10
b
20
------
×
=