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NI PXI-5663 Calibration Procedure
5.
Lock the NI PXI-5652 to the reference used by the test equipment. Use the niRFSA
Configure Ref Clock VI or the
niRFSA_ConfigureRefClock
function.
6.
Set the NI 5663 to make a spectrum acquisition using the niRFSA Configure Acquisition
Type VI or the
niRFSA_ConfigureAcquisitionType
function.
7.
Set the NI 5663 for a resolution bandwidth according to Table 11 using the niRFSA
Configure Resolution Bandwidth VI or the
niRFSA_ConfigureResolutionBandwidth
function.
8.
Set the NI 5663 reference level according to Table 11 using the niRFSA Configure
Reference Level VI or the
niRFSA_ConfigureReferenceLevel
function.
9.
Set the NI 5663 center frequency and span per Table 11 using the Center Span instance of
the niRFSA Configure Spectrum Frequency VI or the
niRFSA_ConfigureSpectrumFrequencyCenterSpan
function.
10. Use the niRFSA Property Node to set the following properties:
•
Spectrum Averaging Mode to
RMS Averaging
•
Spectrum Number of Averages to
10
•
Spectrum Units to
Volts Squared
or set the following attributes:
•
NIRFSA_ATTR_SPECTRUM_AVERAGING_MODE
to
NIRFSA_VAL_RMS_AVERAGING
•
NIRFSA_ATTR_SPECTRUM_NUMBER_OF_AVERAGES
to 10
•
NIRFSA_ATTR_POWER_SPECTRUM_UNITS
to
NIRFSA_VAL_VOLTS_SQUARED
11. Commit the settings to hardware using the niRFSA Commit VI or the
niRFSA_Commit
function.
12. Set the NI 5663 to read the power spectrum using the niRFSA Read Power Spectrum
(Cluster) VI or the
niRFSA_ReadPowerSpectrumF64
function.
Table 11.
NI 5663 Settings for Non-Input-Related Spurs
NI 5663 Tuned
Frequency
RF
Attenuation
Reference
Level
Span
Resolution
Bandwidth
10 MHz to <120 MHz
0 dB
-60 dBm
10 MHz
500 Hz
120 MHz to <330 MHz
0 dB
-60 dBm
20 MHz
500 Hz
330 MHz to <6600 MHz
0 dB
-60 dBm
50 MHz
500 Hz