NI 5622 Calibration Procedure
40
ni.com
13. This step varies depending on the programming language used.
(LabVIEW)
Calculate the SSB phase noise of the acquired signal using the
mod_Phase Noise Calculation VI located at:
<LabVIEW Directory>\
vi.lib\addons\Modulation\Analog\support
.
(C/C++)
Calculate the SSB phase noise of the acquired signal.
14. Repeat steps 11 through 13 fifteen times to obtain an average SSB
phase noise spectrum.
15. Compare the last phase noise results to the
Published Specifications
for the current iteration listed in Table 7. If the results are within the
selected test limit, the device has passed this portion of the verification.
16. Repeat steps 7 through 15, for each iteration in Table 7.
17. End the session using the niScope Close VI.
You have finished verifying the SSB phase noise for the NI 5622.
LabVIEW VI
Input Parameters
Set the following parameters:
offset stop (Hz)
:
1,000,000
IQ data (complex)
: Complex
window
: Hanning
restart averaging (F)
:
TRUE
for
iteration 1;
FALSE
for iterations
2 through 10
averaging parameters»averaging
mode:
RMS averaging
averaging parameters»weighting
mode
: Linear
averaging parameters»number of
averages
:
15
desired offset values (Hz)
:
[
100, 1000, 10000
]
LabVIEW VI
C/C++ Function Call
Call
niScope_close
with the following
parameter:
vi
: The instrument handle from
niScope_init