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NI PXIe-5693 Calibration Procedure
Note
For frequencies >700 MHz, use the high frequency power combiner in place
of the low frequency power combiner.
38. Compare the calculated out-of-band TOI
values to the verification test limits in Table 11
and Table 12 as appropriate.
39. Close the NI 5693 session.
If the out-of-band TOI 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 Reverse Isolation
1.
Connect the RF source 1 to the power splitter input using the SMA (m)-to-SMA (m) cable.
2.
Connect the 20 dB attenuator to the reference output of the power splitter.
3.
Connect power sensor A to the 20 dB attenuator.
4.
Connect the other output of the power splitter to the NI 5693 RF OUT connector using the
SMA (m)-to-SMA (m) adapter.
5.
Connect the 10 MHz clock reference output connector on the RF source 1 back panel to the
spectrum analyzer REF IN connector using the BNC (m)-to-BNC (m) cable.
Table 11.
Out-of-Band TOI Verification Test Limits Preamp Disabled
Center Frequency
As-Found Limit (dB)
As-Left Limit (dB)
20 MHz to 150 MHz
38
41.6
>150 MHz to 2.5 GHz
30
32
>2.5 GHz to 7 GHz
29
31
Table 12.
Out-of-Band TOI Verification Test Limits Preamp Enabled
Center Frequency
As-Found Limit (dB)
As-Left Limit (dB)
20 MHz to 150 MHz
10
11.3
>150 MHz to 2.5 GHz
0
1.7
>2.5 GHz to 7 GHz
9
11.1
