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NI PXI-5663 Calibration Procedure
4.
Set the PN source power level to 0 dBm.
5.
Create a new session for the NI 5663 using the niRFSA Initialize VI or the
niRFSA_init
function.
6.
Lock the NI PXI-5652 to its onboard clock using the niRFSA Configure Ref Clock VI or
the
niRFSA_ConfigureRefClock
function.
7.
Set the NI 5663 reference level according to Table 17 using the niRFSA Configure
Reference Level VI or the
niRFSA_ConfigureReferenceLevel
function.
8.
Set the NI 5663 center frequency according to Table 18 and span according to Table 17
using the Center Span instance of the niRFSA Configure Spectrum Frequency VI or the
niRFSA_ConfigureSpectrumFrequencyCenterSpan
function.
9.
Set the NI 5663 to make a spectrum acquisition using the niRFSA Configure Acquisition
Type VI or the
niRFSA_ConfigureAcquisitionType
function.
10. Set the NI 5663 resolution bandwidth according to Table 17 using the niRFSA Configure
Resolution Bandwidth VI or the
niRFSA_ConfigureResolutionBandwidth
function.
11. Commit the settings to hardware using the niRFSA Commit VI or the
niRFSA_Commit
function.
12. Perform an internal self-calibration on the NI 5622 using the niRFSA Self Cal VI or the
niRFSA_SelfCal
function.
13. Set the PN source frequency to the PN source RF frequency in Table 18.
14. Correct the PN source frequency as necessary to obtain a signal centered at the NI 5663
tuned frequency.
Table 17.
NI 5663 Settings for Phase Noise
Frequency Range
Reference Level
Span
Resolution Bandwidth
All
0 dBm
30 kHz
100 Hz
Table 18.
NI 5663 Center Frequency, PN Source
RF FrequencySettings for NI 5663 Phase Noise
Start (MHz)
Stop (MHz)
Step (MHz)
500
—
—
1,000
—
—
1,500
—
—
2,000
—
—
2,900
—
—
3,000
—
—