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PXIe-5673E Calibration Procedure
5.
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 4
•
Reference level: +5 dBm
•
Frequency span: 0 Hz
•
Resolution bandwidth: 500 Hz
•
Sweep time: 5 ms
•
Reference clock source: External
6.
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 4 × 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.
7.
Calculate the power level in dBc of each harmonic tone
≤
6.6 GHz by subtracting the
fundamental power from step 5 from the harmonic power from step 6, as shown in the
following equation:
P
harmonic
=
H
x
-
F
8.
Compare the values calculated in step 7 to the corresponding limits in Table 11.
9.
Repeat steps 5 through 8 for the following frequency ranges:
•
PXIe-5650: 100 MHz to 500 MHz in 10 MHz increments, including endpoints and
500 MHz to 1.3 GHz in 50 MHz increments, including endpoints
•
PXIe-5651: 100 MHz to 500 MHz in 10 MHz increments, including endpoints and
500 MHz to 3.3 GHz in 50 MHz increments, including endpoints
•
PXIe-5652: 100 MHz to 500 MHz in 10 MHz increments, including endpoints, and
500 MHz to 6.6 GHz in 50 MHz increments, including endpoints.
