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NI PXI-5663 Calibration Procedure
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© National Instruments
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As-Found and As-Left Limits
The as-found limits are the published specifications for the NI 5663. NI uses these limits to
determine whether the NI 5663 meets the device specifications when it is received for
calibration.
The as-left limits are equal to the published NI specifications for the NI 5663, less guard bands
for temperature drift and drift over time. NI uses these limits to determine whether the NI 5663
meets the device specifications over its calibration interval.
Note
Where there is no difference between an “As Found” and an “As Left” limit,
only a “Test Limit” is specified.
Verification Procedures
Verification tests the following NI 5663 specifications:
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Absolute accuracy
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Average noise level
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LO output power
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Non-input-related spurs (residual spurs)
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Sideband spurs
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Phase noise
Verification of the NI 5663 is complete only after you have successfully completed all tests in
this section.
Caution
The connectors on the DUT and test equipment are fragile. Perform the
instructions in this procedure with great care to prevent damaging any DUTs or test
equipment.
Verifying Reference Accuracy
The NI 5663 reference accuracy specification is derived from the NI 5652 frequency accuracy.
For more information about NI PXI-5652 calibration values, refer to the
NI PXI-5650/5651/5652
Calibration Procedure
available at
ni.com/manuals
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Absolute Accuracy Verification
Table 5 shows the test limits.
Reference Levels Less than -30 dBm
1.
Connect the RF source to the power splitter input through the 3.5 mm-to-3.5 mm cable.
2.
Connect the power splitter reference output to power sensor A.
3.
Connect the other power splitter output to the NI 5601 RF IN connector through the 30 dB
attenuator and 3.5 mm (m)-to-3.5 mm (m) adapter.