![background image](http://html1.mh-extra.com/html/national-instruments/pxi-5663/pxi-5663_calibration-procedure_709886018.webp)
18
|
ni.com
|
NI PXI-5663 Calibration Procedure
8.
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.
9.
Set the NI 5663 center frequency according to Table 9 using the Center Span instance of
the niRFSA Configure Spectrum Frequency VI or the
niRFSA_ConfigureSpectrumFrequencyCenterSpan
function.
10. Commit the settings to hardware using the niRFSA Commit VI or the
niRFSA_Commit
function.
Note
The NI PXI-5652 and NI PXIe-5601 are tuned so that they can control the
NI PXIe-5601 internal state. The NI PXI-5652 is not otherwise used in this test.
11. Set the RF source to the center frequency shown in Table 9.
12. At each center frequency, perform the following steps:
a.
Adjust the RF source power to satisfy the following equation:
Channel A Power
+
RF Input Calibration Factor
= 0 dBm ±0.5 dB
Use the appropriate RF frequency for the channel A sensor. Calculation of the
RF
Input Calibration Factor
may require interpolation.
b.
Measure and record the channel B power. This value is the
LO Output Power
. Use the
appropriate RF frequency for the channel B sensor.
13. Compare the
LO Output Power
to the test limits in Table 10.
14. Repeat steps 9 through 13 for all frequencies in Table 9.
15. Close the NI 5663 session using the niRFSA Close VI or the
niRFSA_close
function.
If the results are within the selected test limit, the device has passed this portion of the
verification.
Table 9.
NI 5663 LO Output Power Settings
Center Frequency
Start (MHz)
Stop (MHz)
Step (MHz)
Span (Hz)
10
6,510
100
100
6,600
—
—
100
Table 10.
LO Output Verification Test Limits
Frequency
Test Limit
10 MHz to 6.6 GHz
0 dBm ±3.5 dB (nominal)
Note
: LO Input Power = 0 dBm ±0.5 dB.