NI 5622 Calibration Procedure
28
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23. Calculate the power difference using the following formula:
where
a
=
Digitizer Measured Sine Wave Amplitude
b
=
Flatness Gain Correction Factor
c
=
Power Meter Measured Sine Wave Power
d
=
Digitizer Measured Sine Wave Reference Amplitude
e
=
Reference Flatness Gain Correction Factor
f
=
Power Meter Measured Sine Wave Reference Power
Compare the result to the
Published Specifications
for the current
iteration listed in Table 5. If the results are within the selected test
limit, the device has passed this portion of the verification.
24. Repeat steps 6 through 23 for each iteration in Table 5.
25. End the session using the niScope Close VI.
You have finished verifying the bandpass amplitude flatness for the
NI 5622.
LabVIEW VI
C/C++ Function Call
Call
niScope_close
with the following
parameter:
vi
: The instrument handle from
niScope_init
power
10 log
10
×
a b
×
(
)
2
f
×
d e
×
(
)
2
c
×
----------------------------
=
