PXIe-5673E Calibration Procedure
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© National Instruments
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17
14. Set the niRFSG 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
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Attenuation: 5 dB
•
Preamplifier: On
15. Measure tone power with the spectrum analyzer and calculate the adjusted tone power
using the
AdjustedMeasurement [i]
equation from Step 13.
16. Compare the measured values from steps 7 through 14 to the corresponding limits in
Table 7.
If the results are within the selected test limit, the device has passed this portion of the
verification.
Verifying Output Intermodulation Products
Complete the following steps to verify the output intermodulation (IMD) performance of an
PXIe-5673E using a spectrum analyzer. Complete this test for each iteration in Table 8.
1.
Connect the PXIe-5611 RF OUT front panel connector to the spectrum analyzer RF INPUT
front panel connector through the SMA(m)-to-SMA(m) cable.
2.
Connect the PXIe-5650/5651/5652 REF IN/OUT front panel connector to any rubidium
frequency reference rear panel BNC connector through the BNC(m)-to-SMA(m) cable.
3.
Connect any available rubidium frequency reference rear panel BNC connector to the
spectrum analyzer REF IN rear panel connector through the BNC(m)-BNC(m) cable.
Table 7.
Output Power Level Accuracy Verification Test Limits
Output Power (dBm)
As-Found Limit (dB)
As-Left Limit (dB)
5
±0.75
±0.55
0
±0.75
±0.55
-10
±0.75
±0.55
-30
±0.75
±0.55
-60
±0.75
±0.55
-90
±0.75
±0.55
