PXIe-5673 Calibration Procedure
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© National Instruments
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23
8.
Calculate the power level in dBc of each harmonic tone
≤
6.6 GHz by subtracting the
fundamental power from step 6 from the harmonic power from step 7, as shown in the
following equation:
P
harmonic
=
H
x
-
F
9.
Compare the values calculated in step 8 to the corresponding limits in Table 11.
10. Repeat steps 6 through 9 for the following frequency ranges:
•
PXI-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
•
PXI-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
•
PXI-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
Note
Harmonic, subharmonic, and non-integer harmonic levels outside the device
frequency range are typical.
If the results are within the selected test limit, the device has passed this portion of the
verification.
Verifying Baseband Linearity-Related Spurs
Complete the following steps to verify the baseband-related spur levels of the 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 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.
Table 11.
RF Harmonic Power Upper Test Limits
Harmo-
nic
PXIe-5650/5651/
5652
PXIe-5651/
5652
PXIe-5652
100 MHz
to
250 MHz
>250 MHz
to 1.3 GHz
>1.3 GHz
to
2.2 GHz
>2.2 GHz
to
3.3 GHz
>3.3 GHz
to
3.5 GHz
>3.5 GHz
to
4.4 GHz
>4.4 GHz
to
6.6 GHz
2nd
(2F)
-23.0 dBc
-28.0 dBc
-23.0
dBc
-23.0
dBc
—
—
—
3rd
(3F)
-23.0 dBc
-28.0 dBc
-23.0
dBc
—
—
—
—
Half
(0.5F)
—
—
—
—
-34.0
dBc
-34.0
dBc
-34.0
dBc
1.5
(1.5F)
—
—
—
—
-41.0
dBc
-46.0
dBc
—
