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PXIe-5673 Calibration Procedure
7.
Use the spectrum analyzer to measure the mean power within the configured span of the
spectrum analyzer using the following spectrum analyzer parameter settings and record the
value:
•
Center frequency: (Frequency in step 6) + 10 kHz
•
Reference level: 0 dBm
•
Frequency span: 100 Hz
•
Resolution bandwidth: 10 Hz
•
Reference clock source: External
•
Trace averaging: 20 traces
8.
Apply the following equation to the value measured in step 7:
phase noise
SSB
at 10 kHz offset = Measurement
- 10log (
RBW
)
9.
Subtract the measurement recorded in step 6 from the value calculated in step 8.
10. Verify that the value calculated in step 9 meets the limits as specified in Table 13.
11. Repeat steps 6 through 10 for the remaining frequencies listed in the
Frequency
column in
Table 13.
If the results are within the selected test limit, the device has passed this portion of the
verification.
Verifying Frequency Accuracy
Complete the following steps to verify the frequency accuracy of an PXIe-5673 using a spectrum
analyzer.
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 any available rubidium frequency reference rear panel BNC connector to the
spectrum analyzer REF IN rear panel connector through the BNC(m)-to-SMA(m) cable.
Table 13.
SSB Phase Noise at 10 kHz Offset
CW Source
Frequency (GHz)
Test Limit (dBc/Hz)
PXI-5650/5651/5652
0.5
<-111
1.0
<-105
PXI-5651/5652
2.0
<-98
3.0
<-95
PXI-5652
4.0
<-93
5.0
<-90
6.6
<-90
