![background image](http://html1.mh-extra.com/html/national-instruments/pxi-5663/pxi-5663_calibration-procedure_709886011.webp)
NI PXI-5663 Calibration Procedure
|
© National Instruments
|
11
9.
Set the NI 5663 for a resolution bandwidth according to Table 3 using the niRFSA
Configure Resolution Bandwidth VI or the
niRFSA_ConfigureResolutionBandwidth
function.
10. Set the NI 5663 reference level according to Table 3 using the niRFSA Configure
Reference Level VI or the
niRFSA_ConfigureReferenceLevel
function.
11. Set the NI 5663 center frequency according to Table 4 and span according to Table 3 using
the Center Span instance of the niRFSA Configure Spectrum Frequency VI or the
niRFSA_ConfigureSpectrumCenterFrequencySpan
function.
12. Commit the settings to hardware using the niRFSA Commit VI or the
niRFSA_Commit
function.
13. Set the RF source to the center frequency according to Table 4.
14. Adjust the RF source power using the following equation:
Channel A Power
+
RF Input Attenuated Calibration Factor
=
Reference Level
±1 dB.
Reference Level
is the value from Table 3. Use the appropriate RF frequency for the
channel A sensor. Calculation of the
RF Input Attenuated Calibration Factor
may require
interpolation.
Note
Set the signal generator to its maximum power if it does not have sufficient
power to reach the reference level.
15. Record the channel A power.
Table 3.
NI 5663 Settings (All Frequencies)
Device Setting
Value
Reference Level
-60 to 15 dBm, 5 dB steps
Span
5 MHz
Resolution Bandwidth
100 kHz
Table 4.
NI 5663 Center Frequencies
Beginning (MHz)
Ending (MHz)
Step (MHz)
10
100
10
200
300
100
330
—
—
400
6,400
200
6,590
—
—