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NI PXIe-5693 Calibration Procedure
23. Compare the calculated noise figure
values to the verification test limits in Table 6.
24. Close the NI 5693 session.
If the noise figure verification procedure determines that the NI 5693 is outside of its limits, refer
to
Worldwide Support and Services
for information about support resources or service requests.
Verifying In-Band Third Order Intercept (TOI)
1.
Connect the RF source 1 RF OUT connector to the low frequency power combiner input
using the SMA (m)-to-SMA (m) cable.
2.
Connect the RF source 2 RF OUT connector to the other low frequency power combiner
input using the SMA (m)-to-SMA (m) cable.
3.
Connect the low frequency power combiner output to the power splitter input using the
SMA (m)-to-SMA (m) cable.
4.
Connect the 20 dB attenuator to the reference output of the power splitter.
5.
Connect power sensor A to the 20 dB attenuator.
6.
Connect the other output of the power splitter to the NI 5693 RF IN connector using the
SMA (m)-to-SMA (m) adapter.
7.
Connect the 10 MHz clock reference output connector on the RF source 1 back panel to the
10 MHz clock reference input connector on the RF source 2 back panel using the
BNC (m)-to-BNC (m) cable.
8.
Connect the 10 MHz clock reference output connector on the RF source 2 back panel to the
clock reference connector on the spectrum analyzer using the BNC (m)-to-BNC (m) cable.
Table 6.
Noise Figure Verification Test Limits
Frequency
As-Found Limit (dB)
As-Left Limit (dB)
20 MHz to 150 MHz
13
11.1
>150 MHz to 2.5 GHz
14.5
12.9
>2.5 GHz to 3.2 GHz
15
13.5
>3.2 GHz to 5.5 GHz
18
16
>5.5 GHz to 7 GHz
18.5
17
