National Instruments PXIe-5611, Процедура калибровки

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NI PXIe-5611 Calibration Procedure 20 ni.com
13. Set the NI-RFSG Power Level property to
–60
dBm, and repeat steps 7
through 9 using only the spectrum analyzer and its measured
correction to measure the power accuracy using the following
spectrum analyzer parameter settings:
• Center frequency: frequency in step 7 + 1 MHz
• Reference level: –30 dBm
• Frequency span: 0 Hz
• Resolution bandwidth: 500 Hz
• Sweep time: 20 ms
• Reference clock source: External
• Attenuation: 5 dB
• Preamplifier: On
14. Set the NI-RFSG Power Level property to
–90
dBm and repeat steps 7
through 9 using only the spectrum analyzer and its measured
correction to measure the power accuracy using the following
spectrum analyzer parameter settings:
• Center frequency: frequency in step 7 + 1 MHz
• Reference level: –30 dBm
• Frequency span: 0 Hz
• Resolution bandwidth: 500 Hz
• Sweep time: 200 ms
• Reference clock source: External
• Attenuation: 5 dB
• Preamplifier: On
15. Compare the measured values from steps 7 through 14 to the
corresponding limits in Table 8.
If the results are within the selected test limit, the device has passed this
portion of the verification.
Table 8. RF Path Gain Verification Test Limits
Output Power (dBm) Power Accuracy Test Limits (dB)
5 ±0.75
0 ±0.75
–30 ±0.75
–60 ±0.75
–90 ±0.75