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NI PXI-5663 Calibration Procedure
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© National Instruments
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23
8.
Set the NI 5663 reference level according to Table 13 using the niRFSA Configure
Reference Level VI or the
niRFSA_ConfigureReferenceLevel
function.
9.
Set the NI 5663 center frequency according to Table 14 and span according to Table 15
using the Center Span instance of the niRFSA Configure Spectrum Frequency VI or the
niRFSA_ConfigureSpectrumFrequencyCenterSpan
function.
Note
Search span is used later in step 18.
10. Set the NI 5663 resolution bandwidth according to Table 15 for the span selected in step 9
using the niRFSA Configure Resolution Bandwidth VI or the
niRFSA_ConfigureResolutionBandwidth
function.
11. Use the niRFSA Property Node to set the following properties:
•
Spectrum Averaging Mode to
RMS Averaging
•
Spectrum Number of Averages to
10
or set the following attributes:
•
NIRFSA_ATTR_SPECTRUM_AVERAGING_MODE
to
NIRFSA_VAL_RMS_AVERAGING
•
NIRFSA_ATTR_SPECTRUM_NUMBER_OF_AVERAGES
to
10
Table 13.
NI 5663 Settings
Frequency Range
Reference Level
10 MHz to <6,600 MHz
-30 dBm
Table 14.
NI 5663 RF Frequencies
Start (MHz)
Stop (MHz)
Step (MHz)
10
90
20
100
900
200
1,000
1,000
1,000
Table 15.
NI 5663 Search Settings
Span
Resolution Bandwidth
Search Span
200 kHz
100 Hz
15 kHz
2 MHz
500 Hz
150 kHz
9.59 MHz
500 Hz
1.5 MHz