16 | ni.com | NI PXI-5650/5651/5652 Calibration Procedure
• Reference Clock source: External
• Resolution bandwidth: 100 Hz
9. Measure the peak power using the spectrum analyzer with the settings from step 8 and
record the value. This value is the highest peak between 3 kHz and 100 kHz offset from the
fundamental frequency.
10. Subtract the measurement in step 7 from the measurement in step 9.
11. Verify that the result calculated in step 10 is within the >3 kHz Offset limits listed in
Table 7.
The following steps measure the nonharmonic levels freqOffset > 100 kHz where freqOffset is
the frequency offset from the tone being generated.
12. Configure the spectrum analyzer with the following settings:
• Center frequency: 200 MHz
• Reference level: +5 dBm
• Resolution bandwidth: 500 Hz
• Span: 100 kHz
• Reference Clock source: External
13. Measure the peak power using the spectrum analyzer with the settings from step 12, and
record the value.
14. Subtract the measurement from step 13 from the measurement in step 7.
15. Verify that the result is within the >100 kHz Offset limits specified in Table 7.
16. Repeat steps 12 through 15 for the remaining frequencies listed in the Test Point column in
Table 8.
17. Repeat steps 5 through 16 using the Center Frequency shown in Table 9.
Table 7. Nonharmonics at ≤0 dBm Output Power
RF Output Frequency
Test Limits
>3 kHz Offset (dBc) >100 kHz Offset (dBc)
500 kHz to <50 MHz <-57 <-57
50 MHz to <3.3 GHz <-65 <-70
3.3 GHz to 6.6 GHz <-50 <-65
To Next Page
Loading...
Need help?
General
