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PXIe-5673 Calibration Procedure
Verifying RF Harmonics
Complete the following steps to verify the harmonic performance of an PXIe-5673 module 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 the PXIe-5450 CLK IN front panel connector to any rubidium frequency reference
rear panel BNC connector through the BNC(m)-to-SMA(m) cable.
3.
Connect the PXIe-5450 CLK OUT front panel connector to the PXI-5650/5651/5652 REF
IN/OUT front panel connector.
4.
Connect any available rubidium frequency reference rear panel BNC connector to the
spectrum analyzer REF IN rear panel connector through the BNC(m)-to-BNC(m) cable.
5.
Generate a signal with the following niRFSG property settings:
•
Frequency (Hz): 100 MHz
•
Power Level (dBm): 0 dBm
•
Generation Mode: CW
•
Reference Clock Source: ClkIn
6.
Use the spectrum analyzer to measure the fundamental tone power using the following
spectrum analyzer parameter settings (name this measurement
F
):
•
Center frequency: Frequency from step 5
•
Reference level: +5 dBm
•
Frequency span: 0 Hz
•
Resolution bandwidth: 500 Hz
•
Sweep time: 5 ms
•
Reference clock source: External
7.
Use the spectrum analyzer to measure each harmonic tone listed in Table 11 using the
following spectrum analyzer settings (name this measurement
H
x
, where
x
is the harmonic
number):
•
Center frequency: (Frequency from step 5) × (harmonic number)
•
Reference level: +5 dBm
•
Frequency span: 0 Hz
•
Resolution bandwidth: 500 Hz
•
Sweep time: 5 ms
•
Reference clock source: External
Note
Only measure subharmonic tones at fundamental frequencies
≥
3.3 GHz.
